add axis labels matplotlib make circles circular by changing dimensions of the plot box. There s also the axis labels title and legend to consider when you want to customize your axes but also taking into account the axis scales and gridlines might come in handy. Legends labels and titles . I am plotting a time series heatmap and I am struggling to add labels to the x axis y axis and assign a title. Output. Mar 26 2019 Lastly let 39 s just add some labels and styles and put it all together. show Matplotlib x axis label. pyplot as plt Matplotlib Plotting in Python Yann Tambouret. savefig 39 1. Create a list d with values 25 50 75 100 125 . 1 instead of 1. The problem is that now the x axis doesn t have a line so we ll have to add one ourselves. heatmap data_plot plt. So when I graph a whole day the x axis labels basically turn into a black bar because they overlap so much. There are a few ways to invoke it On startup you can add a command line argument ipython notebook pylab or ipython notebook pylab inline The first can be used with the notebook or with the normal IPython interpreter. Some toolkits which extend the functionality of Python Matplotlib are IPython has a built in mode to work cleanly with matplotlib figures. to the current axes in the current figure. Solution is to show string values as labels and range len x would display values through 1 to 5 in x axis. axis quot xzero quot . Using quot twinx quot funcion you can add x axis at the top of the figure. set_xlabel 39 X axis 39 fontsize 12 ax. plot function can be used to draw lines please see below example. The axes an instance of the class plt. You can plot interactively You can plot programmatically ie use a script You can embed in a GUI iPython If you are using version prior to matplotlib 2. norm mu By default the y axis tick labels use exponential notation with an exponent value of 4 and a base of 10. plot x xi 1 for xi in x plt. Figure can be thought of as a single container which contains all the objects representing axes graphics text labels etc. 28 Jul 2013 This is a common enough situation that Matplotlib has a standard procedure for handling Lines 17 18 set the axis labels and Line 20 does the plotting. Generating visualization with Pyplot is very easy. Remember that Matplotlib calculates the x Mar 16 2019 Finishing Touches add nicely formatted labels and title. Things like quot labelpad quot parameters in xlabel or ylabel command are currently ignored. 1 but the first label is at 1. Customize Pie Chart. Create an axis associated with figure fig using add_subplot. Matplotlib can be used in Python scripts the Python and IPython shell the jupyter notebook web application servers and four graphical user interface toolkits. Returns osm osr tuple of ndarrays The first method is like normal plotting first draw the main plot then add a colorbar to the main plot. Feb 26 2020 import matplotlib. Python Matplotlib Seaborn import numpy as np import matplotlib. Making the bar plots. Simple Subplot . collections. I believe this article itself is sufficient to get started with plotly in whichever language you prefer R or Python. 3. plot y 39 bo 39 add little blue o 39 s at each point plt. xlabel plt. This seems like such a common thing that it should be easy but it 39 s one of the most commonly asked questions on StackOverflow for both seaborn and matplotlib. When you plot you get back an ax element. layout tuple optional. Now let s add annotations to the line. edit note that sometimes matplotlib sets labels 39 39 so it might look like a label is not present when in fact it is and just isn t displaying anything. To start import matplotlib. Any colormap can be reversed by appending 39 _r 39 so 39 RdYlGn_r 39 is the reversed Red Yellow Green colormap. Matplotlib is a library for making 2D plots of arrays in Python. added minor tick labels on x and y axes We got minor ticks for free when we log scaled our axis but if we want to add nbsp To add labels on x and y axis while using basemap a solution is to use the pyplot functions xlabel and or ylabel plt. Now that we covered the basics of how to create a figure canvas and adding axes instances to the canvas let 39 s look at how decorate nbsp I use matplotlib 39 s pyplot regularly to generate plots for product analytics or One of the downsides of plotting dates on the x axis is that the x tick labels usually end up that doesn 39 t obstruct some of your data you can add some transparency. . twinx and then plot on different axes . Matplotlib Series Overview Jul 31 2019 Change the size of x axis labels. We wish to display only the stock symbols and their respective single day percentage price change. This sub package is already imported as plt. DataFrame. Plotting of graphs is a part of data vistualization and this property can be achieved by making use of Matplotlib. e. 25. If the bins are spaced out at 15 minute intervals it makes sense to label the x axis at these same intervals. To make sure you re Jun 18 2020 Axes It is the region where data is plotted on a Matplotlib plot. xlabel quot Sex quot Adjust the label of the x axis gt gt gt plt. pyplot as plt Plot a line based on the x and y axis value list. We create an empty Matplotlib plot and define the figure size. Call plt. However we are going to look at some of the easier things we can do just with Pandas. Axes is what we see above a bounding box with ticks and labels which will eventually contain other plot elements. 7 or 3. set_title or . set_context 39 talk 39 Create a grouped bar chart with job as the x axis and gender as the variable we 39 re grouping on so there are two bars per job. Due to its pluggable nature this package can be used in any GUI applications Web application servers or simple Python scripts. Then we use axes. clf using some dummy data for this example xs np. Make them slightly larger than your axis tick labels so they stand out. For instance with our first set of data the range of the y axis is 0 40 so it has a height of 40 axis points while in the second set the y axis range is 0 1400 so a height of 1400 axis points. Apr 22 2020 We can interact with the axes object directly or use DataFrame. subplots_adjust top 0. Nov 07 2016 Step 4 Adding Titles and Labels. The default font is BitstreamVeraSans Roman but we want to try out something else. They tell us more about the plot and is it essential you include them on every plot you make. class center middle W4995 Applied Machine Learning Visualization and Matplotlib 01 27 20 Andreas C. yticks from matplotlib. In matplotlib text can be added either relative to an individual axis object or to the whole figure. Jul 02 2019 Often though you d like to add axis labels which involves understanding the intricacies of Matplotlib syntax. Now add the bar charts themselves. You can use the plot x y method to create a line chart. ax. xticks for x axis labeling and matplotlib. xlabel quot label quot Example import numpy as np import seaborn as sn import matplotlib. Also it clones the global nature of MATLAB. 5. Each Axes has an X Axis and a Y Axis like in the image above . The xticks or yticks methods are used to set the label positions. dimension. Naturally you need to have your variables plotted before you can add labels to them With . pyplot import from matplotlib. Now just call this function on your axis when you instantiate them and it will take care of the rest. Figure at Matplotlib is a library in Python that creates 2D graphs to visualize data. In order to set the same scale for both axes we can use the axis function This great tutorial of Matplotlib is perfect for developers new to Python and NumPy axc fig. twinx In this article we 39 ll take a look at the classic example of this phenomenon rotating axis tick labels. What can I do to fix this I 39 ve considered only showing one x tick per 60 one per hour but I 39 m more interested in learning the best practices. We can do this in the matplotlib software in Python using the set_xticks function to set where the ticks appear along the x axis and we can use the set_yticks function to set where the ticks appear along the y axis. pylab which allow the user to create plots with code quite similar to MATLAB figure generating code Pyplot tutorial . We add a y label for the vertical axis with the set_ylabel function. Here is how to do it Bar Charts in Matplotlib. labelpad scalar optional default None. Bar charts are used to display values associated with categorical data. Default is None which means that no plot is created. subplot_tool Launch a subplot tool window for a figure. You can use a single axis label centered in the plot frame to label multiple subplot axes. We will add x axis label and y axis label to our Matplotlib plot using nbsp Glyph renderers axes grids and annotations all have a visible property that can Finally to change the distance between the axis label and the major tick labels Future releases will add additional options for laying out legend positions. Aug 14 2013 Apparently I need to add an axis where I will place the colorbar. You can control the defaults of almost every property in matplotlib figure size and dpi line width color and style axes axis and grid properties text and font properties and so on. The artist supports customization either directly from the Colorbar object or from the matplotlibrc. In case subplots True share x axis and set some x axis labels to invisible defaults to True if ax is None nbsp How to change interval on x axis Scatter Plot Pie Chart. In this article we will show you some examples of legends using matplotlib. That 39 s because when the Axes are first created Matplotlib makes a reasonable guess at how much space the ticks and axis labels are going to take and places the plot accordingly. In this post we will see how we can plot a stacked bar graph using Python s Matplotlib library. 0. Getting Started. set_xticks x This ensures we have one tick per year otherwise we get fewer ax May 30 2015 There is useful option in matplotlib which is quite obscure on the internet given how useful it is so it goes into the blog. grid False plt. Content Management System CMS Task Management Project Portfolio Management Time Tracking PDF Education from functools import lru_cache import numpy as np import scipy. figure fig. The idea is to load the original figure as an image and use matplotlib to display it. Use matplotlib Draw Line. Change the font just for the title or axis labels. axes x np. Histogram How to add nbsp 20 Mar 2008 You can use a single axis label centered in the plot frame to label multiple subplot axes. twinx Create a plot of y sin x on the first row x1 np. Sep 14 2016 matplotlib v1. 0 Thanks You can try adjusting the labels and ticks using matplotlib. lenght_fraction 39 or 0. In this case the range function was used to create a sequence of numbers that was used to specify the y axis tick label locations. These commands add text to the Axes title add a title xlabel add an axis label to the x axis ylabel add an axis label to the y axis text add text at an arbitrary location annotate add an annotation with optional arrow The lines plt. plot x2 y2 label quot line 2 quot plt. Using a single axis label to annotate multiple subplot axes When using multiple subplots with the same axis units it is redundant to label each axis individually and makes the graph overly complex. from mpl_toolkits. Let s add some axis labels and a title to make our scatter plot easier to understand. I have tried using xlabel 39 Days in a year 39 and I get this syntax error AttributeError 39 AxesImage 39 object has no property 39 xlabel 39 May 25 2014 This is a short demo showing how to make abstract plots in matplotlib that have arrows pointing in the x and y direction as axis. subplots 3 4 sharex True sharey True add a big axes hide frame fig. We ll begin by adding a title. To modify a label that simply reads percent clarify by writing percentage of and the name of what the y variable is referring to. When we want to put legend somewhere in a figure using Matplotlib most of the time the option loc 39 best 39 will produce the desired results. Axis numerical labeling can be changed using the xticks and yticks commands. Quarter polar plot with matplotlib. rcParams by default. I 39 ve been working with matplotlib. 22 Jan 2019 Now let 39 s add the basic plot features Title Legend X and Y axis labels. com The latest version of this IPython notebook lecture is available at http github. If we know how to transform from matplotlib s coordinate system to the figure coordinates we can add to the existing plot. In Matplotlib we have a module named PYLAB This brings all the classes and functions of NumPy and Matplotlib. figure ax plt. imshow z extent 1 1 1 1 How to change imshow axis values labels in matplotlib Customize the axis values As a first step let 39 s add axis labels and a title to the plot. Axis These are the number line like objects. Update 3 There is a bug in Matplotlib 2. pie . Name it as fig. The font family size and color for the tick labels are stored under the tickfont axis This example shows how to add a title and axis labels to a chart by using the title xlabel and ylabel functions. One critical element is to always add accurate axis labels. We also add a title and axis labels which is highly recommended in your own work. make circles circular by changing axis limits. Related course. Finally by default matplotlib will connect all points we plot but we can turn this off by passing an empty linestyle . Apr 29 2020 Reorder labels in legend Confused about pyplot and matplotlib See Matplotlib Pyplot Pylab etc What 39 s the difference between these and when to use each All examples assume you 39 re working on the pyplot interface. Nov 19 2009 import matplotlib. The axis label has also been renamed and reformatted with a different font size and color. set_title 39 UK election results 39 ax . Aug 12 2019 An informative plot does not only present the data itself well but annotates the content in a way that readers will quickly grasp it. Once you have an axes object the coordinates can either be nbsp 20 Aug 2020 Matplotlib is a multi platform data visualization library built on NumPy arrays and pad Float Distance in points between tick and label nbsp 22 Apr 2020 We can add a y axis label to the secondary y axis in Matplotlib by interacting with the axes object and directly using pandas. The solution provided for each issue. set_ylabel 39 Seats 39 ax . add_legend self legend_data title Draw a legend maybe placing it outside axes and resizing the figure. and sets the coordinate system. female Jun 28 2014 You don 39 t want your viewers squinting to read your plot. Functions To Add Axis Labels In Matplotlib. show the axes and labels work exactly how we want The following are 30 code examples for showing how to use matplotlib. Legends can be placed in various positions A legend can be placed inside or outside the chart and the position can be moved. xlabel This is a Matplotlib function we can use to add label to the x axis of our plot. You can do this for any nbsp 12 Oct 2010 Use the second argument of xticks to set the labels import numpy as np import matplotlib. Spacing in points from the axes bounding box including ticks and tick labels nbsp Use matplotlib. Don 39 t forget to add. subplots figsize 5 6 Create a figure and one subplot gt gt gt plt. scatter df . auto Automatic scaling fill plot box with data Matplotlib has native support for legends. For example you could add a vertical line around the most recent holiday with text exclaiming that this is the holiday season. The only real pandas call we re making here is ma. Matplotlib Scatter Plot with Labels. Dec 20 2017 matplotlib inline import pandas as pd import matplotlib. Here is how to do it In . A compilation of the Top 50 matplotlib plots most useful in data analysis and visualization. 3. Note. Here is a nbsp 31 Jul 2019 You can create distance between the x axis by specifying the label pad argument to a value in the set_xlabel method. show Displaying the plot. The multi bar chart is made by drawing four separate bar charts on the same axes offset each bar chart by a certain amount so they appear side by side. gre_total temp. com Set axis label rotation and font The orientation of the axis tick mark labels is configured using the tickangle axis property. units and assign both statements to _. We do so below using a di erent color and line type. In this matplotlib tutorial we will plot some graphs and change some properties like fonts labels ranges etc. pyplot as plt data_plot np. If you are using version prior to matplotlib 2. Importing the library import matplotlib. 1. Then I cropped the image to the retain only With the custom x axis labels and removal of top and right axes ticks the boxplot now looks like the following If you are curious to learn more about creating boxplots with matplotlib you may find the following links helpful. figsize tuple. png 39 This produces The original plot was Maybe creating the plots using functions from sage might be easier than using matplotlib. Set the Exponent property of the ruler object associated with the y axis. table Add a table to Nov 15 2017 import numpy as np import matplotlib. Addin the label in a bar chart. See full list on dummies. The exponent label and the tick labels change accordingly. Each question includes a specific Matplotlib topic you need to learn When you complete each issue you get more familiar with Data data visualization using matplotlib. Make a simple plot We first import the matplotlib and numpy modules. ylabel to add axis labels to a plot. In this Matplotlib tutorial we 39 re going to cover how we can have multiple Y axis on the same subplot. The library has these two useful functions that does exactly this. axvline and . Recall that the xlabel and ylabel commands take care of the axis name labels. In case subplots True share y axis and set some y axis labels to invisible. annotate label this is the text x y Apr 28 2020 Set_size Method to Set Fontsize of Title and Axes in Matplotlib At first we return axes of the plot using gca method. You can plot interactively You can plot programmatically ie use a script You can embed in a GUI iPython axis related command of the original matplotlib may NOT work. subplot suplot subplot In Matplotlib the figure an instance of class plt. 2. However sometimes we may want to have finer control over where the legend should be in the image. Recall that matplotlib s object oriented approach makes it easy to include more than one plot in a figure by creating additional axis objects fig ax1 ax2 plt. Label X Axis as time seconds . With matplotlib you need to create subplots and share the xaxes. bins int or sequence default 10. plot method to add a y axis label to the secondary y axis in Matplotlib. ylabel 39 This is the Y axis label 39 plt. In a plot the distance between the axeslabel and the axes can be tuned by adding an argument labelpad which when positive increases the distance and which when negative decreases it. Python scripts the Python and IPython shells the Jupyter notebook web application servers and four graphical user interface Aug 17 2011 Now we ll turn off the y axis ax1. pi 100 y1 np. figure. Doing so will cause a group of tabs titled Chart Tools to appear in Excel s toolbar with the Design Layout and Format tabs residing within it. Sometimes it is necessary or desirable to place the legend outside the plot. Because the two plots have different y axis we need to create another axes object with the same x axis using . We also add the title to the plot and set the title s font size and its distance from the plot using the set_position method. 1 Turn on axis lines and labels off Turn off axis lines and labels equal Set equal scaling i. accept parameters same as matplotlib. Now we can jump into how to add labels and titles to the graph. We set the y label to quot Time Squared quot in the code. set_label Function. In this tutorial you 39 ll learn how to add and configure axis labels in matplotlib plots. stats as ss import matplotlib. 7 via Anaconda OSX Attempting to fine tune the positioning of the tick labels only works orthogonal to the direction of the axis in question. They take care of setting the graph limits and generating the ticks the marks on the axis and tick labels strings labelling the ticks . If you provide a single list or array to the plot command matplotlib assumes it is a sequence of y values and automatically generates the x values for you. It accepts two arguments plt. Let s go ahead to making plots. MatPlotLib Tutorial. If we provide a single list or array to the plot command matplotlib assumes it is a sequence of y values and automatically generates the x values. Each Axes has an x axis and a y axis which contain ticks which have major and minor ticklines and ticklabels. plot y plt. The position of the colorbar artist can be decided as for the legend. title quot A Title quot Add plot title gt gt gt plt. As we can see in the above output there is no label on the x axis and on the y axis. plot . sourceforge. xlabel . Nov 15 2017 import numpy as np import matplotlib. In the case of our example code we even already nbsp 20 Dec 2019 In this tutorial we will learn how to add axis labels to a Matplotlib plot. Args axes Dictionary controlling line properties passed to matplotlib. xlabel and Matplotlib Line chart A line chart can be created using the Matplotlib plot function. add_subplot gs1 0 the position of the axes labels nor the Y axis tick labels. ylabel . axes. pyplot as plt data np. postTestScore s 300 c df . Jul 11 2018 With the small code we can create a simple graph through python matplotlib. This tutorial explains matplotlib 39 s way of making python plot like scatterplots bar charts and customize th components like figure subplots legend title. Tips from stackoverflow and checking out python s website itself led me to the proper conclusion fig figure figsize 12 6 p1 fig . _Dimension object label optional label associated with the scale bar default None no label is shown length_fraction length of the scale bar as a fraction of the axes s width default rcParams 39 scalebar. sin x By default matplotlib will find the minimum and maximum of your data on both axes and use this as the range to plot your data. pyplot as xyz a 5 9 7 b 2 20 4 xyz. Further line 15 contains sharey parameter which sets ticks in the y axis of subfig2 equal to subfig1. Bar plot showing daily total precipitation with the x axis dates cleaned up and the format customized so they are easier to read. This is not unique but seems to work with matplotlib 1. To add labels to the axes of a chart in Microsoft Excel 2007 or 2010 you need to Click anywhere on the chart you want to add axis labels to. And that is why I recommend you to use the spines instead. This list helps you to choose what visualization to show for what type of problem using python 39 s matplotlib and seaborn library. yaxis. Matplotlib has so far in all our previous examples automatically taken over the task of spacing points on the axis. pyplot as plt import numpy as np def my_plotter ax data1 data2 param_dict quot quot quot A helper function to make a graph Parameters ax Axes The axes to draw to data1 array The x data data2 array The y data param_dict dict Dictionary of kwargs to pass to ax. Code faster with the Kite plugin for your code editor featuring Line of Code Completions and cloudless processing. Apr 11 2020 a matplotlib_scalebar. Draw a graph with pandas and keep what 39 s returned ax df. First import matplotlib and numpy these are useful for charting. By default labels are aligned with the left edge of the y axis label and with the baseline of the title. Axis. By adapting twinx to the colorbar axis and by shifting the position of labels and ticks you can draw an figure like the example on this page. Jul 23 2020 The matplotlib. Now that we know our script is working properly we can begin adding information to our plot. def myApp import matplotlib. Furthermore we can custom labels to the ticks and ultimately it provides us a freehand for well data visualization. May 26 2020 Do data visualization in Python with Matplotlib. legend ax1 39 Temp 39 And the issue is that this line of code is not resulting in my plot containing a legend. Since python ranges start with 0 the default x vector has the same length as y but starts with 0. Matplotlib can be used in . The following syntax can be used to add a text label to the x tick axis using matplotlib in built function pyplot. Matplotlib Plotting in Python Yann Tambouret. Create a list t with values 5 10 15 20 25 . The value of tickangle is the angle of rotation in the clockwise direction of the labels from vertical in units of degrees. The size in inches of the figure to create. fig ax plt . Formatting the X axis labels. Apr 03 2012 Sometimes it is convenient to plot 2 data sets that have not the same range within the same plots. Next we add an x label for the horizontal axis and we add a y label for the vertical axis. ax2v ax2. loc best is optional parameter in line 15. Mar 27 2013 What is MatPlotLib From the MatPlotLib Website matplotlib. We add the title before the plt. pyplot as plt import numpy as np plt. Bharat Bhole. Then explicitly add an axes where the colorbar resides. 3 2 are used for two subplots as illustrated in Fig. pyplot. To set the title use the set_title method in the axes instance In 17 ax. gridlines to add gridlines and tick labels to a map. tick_params labelcolor 39 none 39 top False bottom False left False right False plt. secondary_yaxis you will now be able to make child axes with only one axis visible. plt. Change Font and Add Data Markers 7. Include multiple characters in the superscript by enclosing them in curly braces . axis. To do this first we need to define a new axis but this axis will be a quot twin quot of the ax2 x axis. show the axes and labels work exactly how we want Matplotlib Line chart A line chart can be created using the Matplotlib plot function. plot kind 39 scatter 39 x 39 GDP_per_capita 39 y 39 life_expectancy 39 Set the x scale because otherwise it goes into weird negative numbers ax. plot Returns out list list of artists Matplotlib comes with a set of default settings that allow customizing all kinds of properties. normal loc 3 scale 0. set for xlim such as xlim quot 2005 06 01 quot quot 2005 08 31 quot to have the tick marks start on June 1st and finish on Aug 31st. Kite is a free autocomplete for Python developers. For your case I submitted this boxplot example that shows you other functionality that could be useful like rotating the tick mark text adding upper Y axis tick marks and labels adding color to the Jul 10 2019 Axes The X and Y axis some plots may have a third axis too Legend Contains the labels of each plot Each element of a plot can be manipulated in Matplotlib s as we will see later. Jun 08 2020 Visualization with Pyplot. I am looking for the most concise way to set axis labels and their font size. How to add labels to the plot Adding the labels to the nbsp Now add axis labels to the plot using plt. Then we shift the text just a bit from there and insert. Use matplotlib. A lot of times graphs can be self explanatory but having a title to the graph labels on the axis and a legend that explains what each line is can be necessary. This slide will show how to set continuous tick labels for an axis. It has a million and one methods two of which are set_xlabel and set_ylabel. For this book we will assume at least Python 2. set is to set specific aesthetics for the current plot and we run sns. R. set_visible False Replace get_yaxis with get_xaxis to access the x axis. set_size title_size axes. This is also a challenge. ylim 0 100 Adjust the limits of the y axis As you can see I had to use matplotlib to rotate the x axis titles so I could actually read them. tight Set limits just large enough to show all data. Labels are the text on the axes. Mar 03 2015 In matplotlib the figure an instance of the class plt. 8 ax1 fig. set_xlabel . Label the axes of a plot. xticks fontsize 14 . Before plotting the figure obviously you have to import the necessary python libraries lets import them. snipped Is there a way to force the label to start at 1. set_ylabel . set_ylabel 39 Y axis 39 fontsize 12 I also know Jul 18 2019 The method of plotting is not so good so I 39 d like to show an improved way to draw second tick axis on the colorbar. As a side note notice how the x label no longer fits on the graph after growing the x axis tick labels. pyplot as plt import numpy as np add matplotlib inline if using a Jupyter notebook remove if using a . Here is a solution. Share this post Pyplot is a module of Matplotlib which provides simple functions to add plot elements like lines images text etc. subplots Create a figure and a set of subplots. legend bool or reverse Place legend on axis subplots. The goal is to create a pie chart based on the above data. In this recipe we are going to see how to set an axis range. pyplot as plt import Set the y axis label ax. xlabel 39 x axis 39 Set the y axis label of the current axis. Boxplot example on matplotlib website. Note that you can also specify the start and end of the labels by adding a parameter to ax. What Is Matplotlib Matplotlib is a Python 2D plotting library which produces publication quality figures in a variety . Sharing Axis ticks Here same y axis ticks i. legend list of titles . pylab as plt fig ax plt. The interface for manipulating these parameters are two pairs of functions. When using the axis option the tickmarks or gridlines for a single axis can be specified using the tickmarks s or gridlines s option. Line chart examples Line chart. Dec 19 2016 Create the Matplotlib figure and define the plot. Is There any way to do that What I 39 ve tried plt. the place where it does not touch the plotted curve. In Python matplotlib we can customize the plot using a few more built in methods. The tickmark specification for all axes may be given through a single tickmarks s1 s2 or tickmarks s1 s2 s3 option for 2 D and 3 D plots respectively where s1 s2 and s3 have the same form as s. Define the x axis and corresponding y axis values as lists. pyplot as plt OutlineInstallationBasic ClassesGenerating GraphsAnalyzing GraphsSave LoadPlotting Matplotlib Adding Edges Adding an edge between nodes that don t exist will automatically add those nodes add nodes from takes any iterable collection and any type anything that has a iter method gt gt gt g nx. Matplotlib PDF from matplotlib. Each of the rectangles has four corners of course and we re looking for the upper right. This parameter find the best place for the legend i. subplots module. plot x xi 2 for xi in x plt. title. pyplot as plt import numpy as np y np. sin x1 Add a label for the legend function1 ax1 Now just call this function on your axis when you instantiate them and it will take care of the rest. title 39 Dummy Plot 39 plt. Step 2 Plot the Pie Chart using Matplotlib. Plot them on canvas using . Since Matplotlib is built on top of NumPy array it needs to incorporate NumPy routine as well. pyplot as plt fig axes plt. Without labels the values portrayed don 39 t have any nbsp How to set the global font title legend entries and axis titles in python. I already The following are 30 code examples for showing how to use matplotlib. Axis grid lines. pyplot as plt import matplotlib. pyplot as plt X 1 2 3 4 5 X axis points Y 2 4 6 8 10 Y axis points plt. Because I 39 m lazy we 39 ll do as little as possible to add the minor ticks. In the listing line 15 and 16 create two subplots. annotate temp. 3 using Listing 3. 1 introduces a way to add a secondary axis on a plot for cases like converting radians to degrees on the same plot. show line in our script. set_label function in axis module of matplotlib library is used to set the label that will be displayed in the legend. For new users matplotlib often feels overwhelming. Change the exponent value to 2. rand 100 for i in range 3 adding upper Y axis tick marks and labels adding color to the boxes etc. subplots figsize Example. M ller Hi everybody. To change the axis values a solution is to use the extent option extent x_min x_max y_min y_max for example . figure fig. For example we cannot use seaborn to modify a plot 39 s title change x or y axis labels or add annotations to nbsp Adding labels. Johansson jrjohansson at gmail. Update 2 I ve figured out changing legend title fonts too. set_visible False Then you can loop over the labels setting them to visible or not depending on the density you want. Feb 18 2014 ACM AVX awk axis background bar bar chart bash BED black black market border bot net C chromosome cline code CUDA data structure Dutta eland fastq file font footer format git graph graphics header IEEE images includegraphics Journal label latex lecture linked list Makefile mapped mapping matplotlib megablast metapost novoalign novocraft May 02 2019 To add axis labels in Microsoft Excel 2007 and 2010. Use log scaling or symlog scaling on y axis 3. We can change the color of labels and percent labels by set_color property of matplotlib. Sep 10 2020 Plotting of data can be extensively made possible in an interactive way by Matplotlib which is a plotting library that can be demonstrated in Python scripts. The code is based on this matplotlib demo. Lucky for us adding labels to axes in Matplotlib is very easy. I would like to label my bubble plot with the labels being INSIDE the bubbles. Dec 21 2019 import matplotlib. I am aware I can do this ax. May 20 2019 Matplotlib 3. Let us add the title X axis label Y axis label and set limit range on both axes. Matplotlib 39 s default tick locators and formatters are designed to be generally sufficient in many common situations. pyplot as plt fig plt. net . Thankfully there s a way to do this entirely using pandas. quiver method works. ylabel 39 y axis 39 xyz. For example we may want to put the legend outside of the axes which is impossible using loc 39 best 39 . You can pass fontname to . Explained in simplified parts so you gain the knowledge and a clear understanding of how to add modify and layout the various components in a plot. Some toolkits which extend the functionality of Python Matplotlib are Jan 04 2017 Introduction to Matplotlib. set_xticklabels with Jan Feb Mar For colors matplotlib features a few built in colors which can be seen here or you can specify then as a hex triplet. xlabel 39 x axis 39 xyz. Create a line plot and add a title and axis labels to the chart. Apr 19 2020 Matplotlib is a library in Python and it is numerical mathematical extension for NumPy library. In our case we 39 re interested in plotting stock price and volume on the same graph and same subplot. Syntax Axis. To the example you cited one can add from matplotlib. Line charts are one of the many chart types it can create. This does not change the font for the numbers on the axes. subplots_adjust Tune the subplot layout. xticks fontsize 14 May 06 2020 Matplotlib. pyplot as plt line 1 points x1 10 20 30 y1 20 40 10 plotting the line 1 points plt. The packages matplotlib. Aug 23 2018 2. Oct 29 2017 Update See the bottom of the answer for a slightly better way of doing it. If we can find out what the height of the y axis is in axis points we can have the label gaps be a fixed fraction of that height. Related course Matplotlib Examples and Video Course. ticker. cmap is a ColorMap a matplotlib object that is essentially a mapping of floats to RGBA colors. plot 1 3 2 4 plt. format y plt. plot x xi 3 for xi in x plt. import numpy as np import matplotlib. It was developed by John Hunter in 2002. subplots_adjust top 0. . To make it clear what our data represents let s include a title as well as labels for each axis. How to do that The plt object has corresponding methods to add each nbsp 7 Jan 2017 Add Chart Titles Axis Labels Fancy Legend Horizontal Line 5. 1 1. plot x1 y1 label quot line 1 quot line 2 points x2 10 20 30 y2 40 10 30 plotting the line 2 points plt. pyplot as plt The matplotlib. matplotlib. The idea is to adjust the existing axes manually to make room for an additional colorbar. pyplot as plt x 1 2 3 y 5 7 4 x2 1 2 3 y2 10 14 12 One simple way using subplots . The explicit way. xlabel 39 This is the X axis label 39 plt. example usr bin env python import nbsp If you use the object oriented interface to Matplotlib you should already have a reference to the axes. Something like this. add_subplot 121 column_render datasets 0 PICKER logData LOG minIn datasets COLOR_SCALE . title give our histogram axis labels and a title. show Oct 02 2009 Hi all I 39 ve been struggling with plotting charts in python. pyplot as plt Define numbers of generated data points and bins per axis. set_size x_size and axes. show command to the end so that it shows both plots. Figures with subplots are created using the make_subplots function from the plotly. It is powerful flexible and has a dizzying array of chart types for you to choose from. These examples are extracted from open source projects. I tried converting the x axis array to datetime objects but that doesn 39 t work. style list or dict. yticks for y axis labeling Aug 16 2020 Therefore matplotlib allowed us to add the ticks manually with our choice . You can add these components using the Axes object . ylabel quot Survived quot Adjust the label of the y axis. pyplot as plt x range 1 10 plt. Anyhow adjusting the pad between axis and the axis label in the axes_grid toolkit way is. You use the method xlabel and ylabel for naming the x and y axis label. pyplot as plt initializing the x axis data technologies 39 Data Science 39 39 Cyber Security 39 39 Web Development 39 39 Android Development 39 39 Data Analyst 39 initializing the y axis data number_of_students 78 49 112 129 59 Giving the I 39 ll add that when learning how to use matplotlib I found the thumbnail gallery to be really useful for finding relevant code and examples. Here is an example of creating a figure that includes two scatter traces which are side by side since there are 2 columns and 1 row in the subplot layout. Just about any version of these packages released in the past 3 years should work for most examples in this book exceptions are noted in this book . In this article one can learn from the generalized syntax for plotly in R and Python and follow the examples to get good grasp of possibilities for creating different plots using plotly. set_xlim 0 70000 Set the x No chart is complete without a labelled x and y axis and potentially a title and or caption. xlabel matplotlib. We will begin by importing Matplotlib using import matplotlib. PathCollection at 0x10ca42b00 gt Scatterplot of preTestScore and postTestScore with the size 300 and the color determined by sex plt . A lot of times graphs can be self explanatory but having a title to t Jan 13 2018 Python Matplotlib Tips Add second x axis at top of figure using Python and matplotlib. py script matplotlib inline Quiver plot with one arrow Let 39 s buid a simple quiver plot that contains one arrow to see how matplotlib 39 s ax. This is illustrated in the below code snippet. 1 matplotlib does not take string values in x axis in bar graph so we need to find workaround to solve this problem. Mar 27 2013 Firstly one should in general stay away from pie charts showing an area when the data relates to the arc lengths is confusing. Name it as ax. Direct Interaction With axes Object We can make a plot with two different y axis by using two different axes objects with the help of twinx function. For example the command gt gt gt tx plt. The requisite packages are numpy matplotlib basemap and scipy. 25 plt. xticks can be used for this task. title 39 Mindmajix 39 xyz. Adding a title uses the set_title method. In matplotlib they are called x ticks and so we use the plt. As an example dataset we 39 ll look at a table of Olympic medal winners. With the help of Axes. of hardcopy formats and interactive environments across platforms. com In this tutorial we 39 re going to cover legends titles and labels within Matplotlib. The plt. Text . 2 In line 11 label sin is added which is displayed by legend command in line 15. You can vote up the ones you like or vote down the ones you don 39 t like and go to the original project or source file by following the links above each example. Specify axis labels with pandas. Mar 25 2015 In matplotlib I want to get a specific tick on the x axis to label a particular value. Provides a new artist for matplotlib to display a colorbar instead of an axis as it is the default in matplotlib. In many cases axis labels or a title actually aren 39 t needed so always ask yourself whether they 39 re redundant or necessary. And for corresponding labels you can use . Next plot the pie chart using matplotlib. plot function. The first group sets the aesthetic style of the plot and the second scales various elements of the figure so that it can be easily incorporated into different contexts. The examples below show GeoCAT comp functions being utilized in real world use cases. ylabel quot common Y quot Barplot Matplotlib Yan Holtz In this post we show how to add title and axis label to your python chart using matplotlib . set_title quot title quot Axis labels Similarly with the methods set_xlabel and set_ylabel we can set the labels of the X and Y axes lt matplotlib. set_xticks you can give exact position of your ticks so say using 31 59 89 adds ticks for these days you can put numbers corrresponding with ends or mids of months. Aug 24 2020 imporitng the pyplot submodule of matplotlib module and giving the alias nickname as plt. A stacked bar graph also known as a stacked bar chart is a graph that is used to break down and compare parts Jan 05 2017 Hey Lanre Thank you. Notice that the y axis goes from 1. ylabel quot Survived quot Adjust the label of the y axis gt gt gt plt. Grid It is the dotted line that divides the axes into multiple equal square spaces. The following are 30 code examples for showing how to use matplotlib. Use log scaling or symlog scaling on x axis. You can use the template below to assist with the plotting of the chart Matplotlib. Use the plot function. add_subplot 211 nbsp 5 Jan 2020 The label text. Figure can be supposed of as a single container that consists of all the objects denoting axes graphics text and labels. Matplotlib have an inbuilt defined function matplotlib. Matplotlib has so far in all our previous examples automatically nbsp Brandon Rohrer Ticks in Matplotlib. Add legend to plot. s This parameter is converted to a string by calling str. subplots 1 1 figsize 10 6 make the figure with the size 10 x 6 inches fig. I am trying to add a legend to this heatmap that explains the variance in color on the map the warmer colors mean a higher temp . With Pandas plot labelling of the axis is achieved using the Matplotlib syntax on the plt object imported from pyplot. In jupyter need the matplotlib inline command to Axis labels grids In 3 plt. xticks function. As a first step I opened Cibirka s figure in GIMP but any other graphics editor will do. pyplot as plt plt. get_yaxis . The idea is to remove the default axis completely and insert arrows with the correct dimensions as substitute axis Customizing the axis labels requires using the set_xlabel and set_ylabel methods of the Axes object. subplots num_rows num_columns Once you have your fig and two axis objects defined you can add data to each axis and define the plot with unique characteristics. switch_backend Close all open figures and set the Matplotlib backend. Matplotlib is the leading visualization library in Python. Graph a b b c c Nov 14 2018 import matplotlib. axvline x 0 plt. axes . Label the line as d 5t. The argument names speak by themselves so I Initialize the matplotlib figure and FacetGrid object. J. We set the x label to quot Time quot in the code. From the example above we add the following two lines to the bottom label_offset lowerAxes quot y quot label_offset upperAxes quot y quot When we use plt. Give a name to x axis and y axis using . import matplotlib. pyplot and plotted bar charts. The Axes Class contains most of the figure elements Axis Tick Line2D Text Polygon etc. subplots 1 1 Share the x axis for both the axes ax1 ax2 ax2 ax1. gt gt gt plt. xticks defines the location of the x axis tick labels. How to add labels to the plot Adding the labels to the figure except the pie chart is the same. Matplotlib is a Python library for creating charts. yticks for y axis labeling Axis labels and legend That s the plot itself created but we still need to add some axis labels and a legend Notice that features like labels and titles are added in separate steps ax . Matplotlib Setting Ticks and Tick Labels Ticks are the markers denoting data points on axes. However it is sometimes preferable to manually set this range to get a better view of the data 39 s extrema. mplot3d import Axes3D import numpy as np import matplotlib import matplotlib. facet_data self Aug 16 2020 Therefore matplotlib allowed us to add the ticks manually with our choice . Sep 02 2017 Changing the color of labels on the chart. text. xticks linspace 5 25 5 with titles axis labels and legends. Also note that we moved the plt. plot x np. logy bool or sym default False. We add an x label for the horizontal axis with the set_xlabel function. Line 18 and 19 add x and y label to curves. Among other things resizing a pie chart have a tendency to make people change their interpretation of the relation between the slices. The legend method adds the legend to the plot. Matplotlib maintains a handy visual reference guide to ColorMaps in its docs. plot a b xyz. Access the ruler object through the YAxis property of the Axes object. Here is the same data visualized as a 3D histogram here we use only 20 bins for efficiency . Let look the code. add Jan 05 2020 matplotlib. Use Seaborn 39 s context settings to make fonts larger. pyplot together into a common namespace. This page shows how to draw two axis to one colorbar using python and matplotlib. Usage Examples . scaled Set equal scaling i. Seaborn splits matplotlib parameters into two independent groups. facet_axis self row_i col_j Make the axis identified by these indices active and return it. Nov 01 2017 for label in ax. But we want to modify the range of x and y coordinates let say x axis now extends from 0 to 6 and y axis now extends to 0 to 25 after modifying. xlabel xlabel fontdict None labelpad None kwargs source Set the label for the x axis. import seaborn as sns sns . Jan 28 2014 Scientific Axis Label with Matplotlib in Python Edgar 28 January 2014 To set the axis of a plot with matplotlib in Python to scientific formation an easy way is to use ticklabel_format the documentation is here . Set x label. Example 3 import numpy as np import matplotlib. Plot y f x . xticks ticks labels ticks a list of positions to place the ticks labels a list of labels to describe each tick This page describes several customisations you can apply on the axis of your matplotlib chart. xlabel quot common X quot plt. Dec 20 2017 lt matplotlib. And say we have a y axis where the range is from 0 to 20. Here is an example applied on a barplot but the same method works for nbsp 7 Mar 2017 Functions dealing with text like label title etc. In this exercise you will customize the content of the axis labels and add a title to a plot. grid plt Aug 14 2013 Apparently I need to add an axis where I will place the colorbar. Using the underlying matplotlib library you can change just about every aspect of what your plots look like and it can get complicated. Matplotlib keeps a global reference to the global figure and axes objects Some of the customizations like adding titles and labels are very simple to use with nbsp In the notebook insert at the beginning of the notebook the following magic When we set tick values we can also provide a corresponding label in the nbsp Make plots of DataFrame using matplotlib pylab. pyplot is a graph plotting package which can be used to construct 2 dimensional graphics using Python programming language. May 22 2018 The Axes is the area on which we plot our data and any labels ticks associated with it. linspace 0 10 1000 ax. text methods respectively Here is the same data visualized as a 3D histogram here we use only 20 bins for efficiency . yticks range 65 86 5 fontsize 14 Along the same vein make sure your axis labels are large enough to be easily read as well. ylabel and plt. preTestScore df . In addition to the classic pyplot module we need other Matplotlib submodules cm color map Considering the way we re going to prepare the plot we need to specify the color map of the graphical elements FuncFormatter We will use this to change the way the Y axis labels are displayed You can try adding two lines to your code to get the axis intersected at 0 0 like this. A solution to change the size of x axis labels is to use the pyplot function xticks . xticks range 1850 2011 20 fontsize 14 plt. com jrjohansson scientific python lectures Feb 26 2020 Matplotlib Practice with solution of exercises Matplotlib is a Python 2D plotting library which produces publication quality figures in a variety of hardcopy formats and interactive environments across platforms. pyplot module or a Matplotlib Axes object can be used or a custom object with the same methods. sns. To solve the first problem we need to rename the numbers on the x axis. I can get some nice styling done like setting the title axes labels and even the figure size. 1 build np111py27_0 via Anaconda Python 2. Collection. Suppose we want to add another plot the quadratic approximation to the cosine function. random. Finally line 21 adds the grid lines to the plot. arange 1 5 0. Introduction Matplotlib is a tool for data visualization and this tool built upon the Numpy and Scipy framework. A step by step tutorial on how to plot functions like y x 2 y x 3 y sin x y cos x y e x in Python w Matplotlib. Labels help people understand the significance of each axis of any graph you create. Up til now the plot hasn 39 t had any labels or a title so let 39 s add those now. show Output Jun 09 2020 What included in this Matplotlib Exercise This exercise contains ten questions. python import matplotlib. They also demonstrate how GeoCAT comp can be used to make plots with Matplotlib using Cartopy and PyNGL work in progress . Format X and Y Axis Tick Labels 6. Matplotlib also able to create simple plots with just a few commands and along with limited 3D graphic Project Management. xlabel 39 Longitude 39 labelpad 40 nbsp A solution to change the size of x axis labels is to use the pyplot function xticks matplotlib. add_subplot 111 frameon False hide tick and tick label of the big axes plt. Figure titles A title can be added to each axis instance in a gure. The character modifies the character immediately following it. All code is available online on this jupyter notebook. We can explicitly define the grid the x and y axis scale and labels title and display options. versionchanged 0. To add the x axis line You can change labels add grids change colors and so on. You can do this with the xlabel ylabel and title functions available in matplotlib. xticks . xlabel quot Numbers quot plt. plot X Y Plotting the line plot plt. See full list on tutorialspoint. random. The key functions needed are xlabel to add an x axis label ylabel to add a y axis label title to add a May 24 2019 How to change imshow axis values labels in matplotlib Change imshow axis values using the option extent. It also shows how to customize the appearance of the axes text by changing the font size. Tuple of rows columns for the layout of the histograms. This page shows how to add second x axis at the top of the figure using python and matplotlib. Dec 20 2019 And we can do this by adding labels to our axes. The matplotlib line style per column. matplotlib and provides a high level interface for drawing attractive statistical graphics. index temp. Let s start by importing the required libraries import pandas as pd import numpy as np import matplotlib. plot y 39 bs 39 Here is the resulting chart. This adds support for such labels plus various options for alignment. 29 Nov 2015 To do this we can call matplotlib 39 s get_ylim method on an Axes object to get the y axis range. The matplotlib code is conceptually divided into three parts the pylab interface is the set of functions provided by matplotlib. set_label self s Parameters This method accepts the following parameters. Add plot title. The final step for this chart is to format the labels associated with the X axis. xlabel nbsp In this post we show how to add title and axis label to your python chart using matplotlib. get_xticklabels 2 label. Ideally I d like to format the ticks on the y axis but I couldn t figure out how to do that without using plt. set_size y_size to change the font sizes of the title x axis label and y axis label respectively. For the font size you can use size fontsize from matplotlib nbsp In this tutorial we 39 re going to cover legends titles and labels within Matplotlib. Matplotlib provide different ways to add a colorbar explicit or implicit way. Let s assumed we ve plotted some stuff. One will use the left y axes and the other will use the right y axis. suptitle Add a centred title to the figure. 0 that s causing tick labels for logarithmic axes to revert to the default font. bar xs ys zip joins x and y coordinates in pairs for x y in zip xs ys label quot . A label is simply a May 18 2019 Simple axes labels Label the axes of a plot. despine self kwargs Remove axis spines from the facets. figure import Apr 08 2018 Axis Grids gt gt gt f ax plt. linspace mu o mu o 100 rv ss. The label positions will also be used as the tick labels if the labels parameter is Aug 23 2018 2. 17 Aug 2011 How to remove the y axis or frame from a matplotlib plot. rand 6 5 map sn. set in the end to set everything back to default settings. PR Summary In scientific publications sub panels are often enumerated a b c identifying them for reference in the figure legend or main text. Apr 23 2020 Notice that on the plot above the x axis and the y axis have different scales the distance between 0 and 5 on the x axis is bigger than the distance between 0 and 20 on the y axis. pyplot and nbsp 4 Mar 2018 Add X and Y axis labels Adjust the figure size Adjust individual font sizes of plot elements Adjust padding between the title and plot Adjust nbsp 4 May 2020 Rotate axis Increase the size from the x ticks and y ticks in the axes Add label to the axes and choose their font size and separation nbsp GeoAxes. suptitle 39 Example of a Legend Being Placed Outside of Plot 39 The data x 1 2 3 y1 1 2 4 y2 2 4 8 y3 3 5 14 Labels to Increasing the font size can cause axis labels to overlap amp X2013 Matplotlib is not yet smart enough to compensate for this. 4 size 10 plt. There are many different marker styles to choose from here is a full list . The Axis. The x axis values ranges from 0 3 and the y axis from 1 4. xlabel and matplotlib. arange 0 10 1 ys np. Here is an example applied on a barplot but the same method works for other chart types. 2f quot . but having a title to the graph labels on the axis and a legend that explains we plot as we 39 ve seen already only this time we add another parameter quot label. Aug 30 2019 If you give it only one array then it assumes that those are values for the y axis so it automatically calculates the x axis. Visually the display looks nice. LABELPAD 10. Jun 22 2020 Create an axis at a specific location inside a regular grid. The following code shows how to do it. Visualization always helps in better analysis of data and enhance the decision making abilities of the user. xlabel and plt. linspace 0 4 np. Draw a line by plotting t values on X Axis and d values on Y Axis. xaxis. logx bool or sym default False. While we can just plot a line we are not limited to that. axhline y 0 plt. Text object which are return type of function plot. One way of doing this is by adding vertical and or horizontal lines and supplementary text to your visualization. GitHub Gist instantly share code notes and snippets. Mar 26 2019 A few comments here. I know how to use axvline to get a vertical line marking that point which is good and I know how to add annotations onto the graph itself but is there a way of getting an additional tick mark at that particular x value in addition to the regular marks Taylor diagram for python matplotlib. Oct 18 2018 This blog specifies how to create pie chart with value labels donut chart and nested pie chart and how to adjust labels 39 size and position with matplotlib in Python. widgets as widgets probability density function generator chached lru_cache beacuse it redraws each time def get_pdf mu sigma 1 offset 4 o sigma offset x np. The matplotlib. annotate to specify a particular font. Official matplotlib documentation on boxplots. set_xticklabels with Jan Feb Mar Doing the data labels is a little tricky and we re relying on the fact that Matplotlib s bar graph has each of the bars in order as children of the axis object. Apr 12 2020 import matplotlib. Oct 15 2019 The output we get is a blank plot with axes ranging from 0 to 1 as shown above. python note that this a nbsp 3 Apr 2012 One will use the left y axes and the other will use the right y axis. But in the pie figure you have to define the labels a list and then pass it inside the pie methods. pyplot as plt Create the figure and two axes two rows one column fig ax1 plt. Let say we have to plot some graph in matplotlib which have x axis and y axis coordinate let say x axis extends from 0 to 10 and y axis extends according to the relation between x and y. grid plt. Number of histogram bins to be used. So say we have an x axis where the range is from 0 to 10. Data Visualization with Matplotlib In this tutorial we 39 re going to cover legends titles and labels within Matplotlib. bar function however takes a list of positions and values the labels for x are then provided by plt. label. ticker import MultipleLocator FormatStrFormatter In my previous post we have seen how we can plot multiple bar graph on a single plot. Display a superscript in the title using the character. plot nbsp python documentation Adding more features to a simple plot axis labels title axis ticks grid and legend. axis 0 20 0 40 plt. These examples are applied on the X axis but can naturally be imitated for the Y axis Title Ticks Labels Limits The title of the axis can be customised through the xlabel function ylabel respectively . I am adding ax1. For that you can add a section that is specific to that axis Clarify the y axis label on your histogram by changing frequency to number of and adding the name of what the y variable is referring to. And the instances of Axes supports callbacks through a callbacks attribute. secondary_xaxis and Axes. The Axes object is a container that holds the axes the ticks the labels The problem is that now the x axis doesn 39 t have a line so we 39 ll have to add one ourselves. Ticks are the markers denoting data points on axes. Today we 39 ll be diving into visualization and You may be wondering why the x axis ranges from 0 2 and the y axis from 1 3. Uses the value in matplotlib. sin x1 Add a label for the legend function1 ax1 Dec 11 2019 Steps involved in plotting a graph. font_manager as font_manager. set_ylabel Adding the legend and showing the plot Matplotlib is a Python module for plotting. add axis labels matplotlib

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