# Matplotlib histogram example

Matplotlib - Histogram - A histogram is an accurate representation of the distribution of numerical data. The first example we will see will be of a simple graph plot. Usually I just import whatever I need -- based on an example. 13 Aug 2016 A histogram shows the frequency on the vertical axis and the Data Visualization with Matplotlib and Python. Sep 28, 2018 · 1. Histogram plots can be created with Python and the plotting package matplotlib. weights: array_like, optional. style. For detail visit Plotting With MatplotLib: Let's Learn By Examples:. hist. I don't think that numpy histogram and thus matplotlib hist is supposed to work with nans or masked arrays. Matplotlib. Setting the style is as easy as calling matplotlib. Moreover, in this Python Histogram and Bar Plotting Tutorial, we will understand Histograms and Bars in Python with the help of example and graphs. matplotlib. histogram() output is a list of nbin+1 bin edges of nbin bins; there is no matplotlib routine which takes those as input. It also directly provides an example case which makes this case clear: Maybe the matplotlib documentation can link to the numpy docs or take this over? The comment above Basic Histogram (Updated) Difference between a bar graph & a histogram: Well, this is still a confusion for most of us b/w bar chart & histogram. Matplotlib Tutorial: Simple Histogram Chart Histogram Charts Plotting. 6 and 3. Each Pyplot function makes some change to a figure. The resulting sample data repeats each value from vals a certain number of times between 23 Nov 2017 Data Visualization in Python — Histogram in Matplotlib OK, let's try some real data example as this toy example is not interesting. If density is True, the weights are normalized, so that the integral of the density over the range remains 1. Contribute to matplotlib/matplotlib development by creating an account on GitHub. import matplotlib. pyplot module which is used for plotting 2D Example. index, df. ylabel("Count", fontsize=16); # Plot the histogram. 2019 Modules non standards > Matplotlib > Histogramme res = pyplot. Steps to plot a histogram in Python using Matplotlib Step 1: Collect the data for the histogram. Sometimes, we may want to display our histogram in log-scale, Let us see how can make our x-axis as log-scale. Each bin also has a frequency between x and infinite. Introduction: Matplotlib is a tool for data visualization and this tool built upon the Numpy and Scipy framework. The simple code for plotting the Aug 20, 2018 · Bug report Bug summary When creating a histogram of a list of datetimes, the input seems to be interpreted as a sequency of arrays. They are extracted from open source Python projects. Related course. Matplotlib can be used to create histograms. This function calls matplotlib. Next, let us move on to another kind of plot using python matplotlib – Histogram. 8 Oct 2018 To create a histogram with matplotlib, first import matplotlib with the In our first example, we will also import numpy with the line import numpy 28 Sep 2018 Create Python Histogram,Example of Python Histogram,Create Python Bar Plot, Example of Python Bar Plots,using matplotlib,using Seaborn 22 Mar 2019 Plot a simple histogram using matplotlib. use(“my style”). Histograms are used to estimate the probability distribution of a continuous variable. title( "Example of Histogram Plot" ). A histogram is a representation of the distribution of data. This article provides the nitty-gritty of drawing a histogram using the matplotlib The following are code examples for showing how to use matplotlib. pyplot as plt plt. Matplotlib histogram example Examples using matplotlib. pyplot is a collection of command style functions that make matplotlib work like MATLAB. Jul 11, 2015 · The plt. A new untitled notebook with the . Each pyplot function makes some change to a figure For Example, creates a figure, creates a plotting area in a figure, plots some lines in a plotting area, decorates the plot with labels, etc. Facetting histograms by subsets of data faceted_histogram. calcHist(). The resulting histogram is an approximation of the probability density function. 373117033603708, 0. Plots may be embedded with an PyQt or WxPython GUI. mplot3d import Axes3D import numpy as np import matplotlib import matplotlib. Finally, Lines 14-22 plot the histogram using matplotlib . . Note that traces on the same subplot, and with the same barmode ("stack", "relative", "group") are forced into the same bingroup, however traces with barmode = "overlay" and on different axes (of the same axis type) can have compatible bin settings. It is very easy to use them, and allows to improve the quality of your work. If you’re interested in data science and data visualization in Python, then read on. 8). pyplot is a plotting library used for two-dimensional graphics in the python programming language. Suppose you have multiple lines in the same plot, each of a different color, and you wish to make a legend to tell what each line represents. Here, we'll explore how to create just line plots and histograms with matplotlib. pyplot. 24 Aug 2015 calcHist function is used to compute a histogram over the grayscale pixel intensities. Visit numfocus. import pandas as pd import matplotlib. py # the histogram of the data n, bins, patches = plt. pyplot as plt 17 Jun 2019 For example: Let's say, you would like to plot a histogram of an RGB image having pixel values ranging from 0 to 255. Rectangles of equal horizontal size correspondi Jan 14, 2019 · This tutorial will explain how to make a matplotlib histogram. 2D histograms are useful when you need to analyse the relationship between 2 numerical variables that have a huge number of values. Oct 24, 2019 · Still not sure how to plot a histogram in Python? If so, I’ll show you the full steps to plot a histogram in Python using a simple example. Line Chart; Bar Hi Users, I'm looking to make a histogram that is normalized by the total number of items shown in the histogram. The histogram is a type of visualization that's very useful to explore your data. random. Bars are also called as bins in Matplotlib. To apply a style to your plot, just add: plt. get_bin_vals(), which makes the numpy histogram. Histogram chart displays the data sets for each category as the bar. fontsize=16); plt. You can vote up the examples you like or vote down the ones you don't like. Usually it has bins, where every bin has a minimum and maximum value. If I make a histogram in the normal way hist(x,10) then I get a histogram showing the total number of items in each bin. Today, we will see how can we create Python Histogram and Python Bar Plot using Matplotlib and Seaborn Python libraries. Nov 26, 2014 · A histogram shows the distribution of values in a single data set (for example, how many fall between 3. A histogram is a way of representing the frequency distribution of a numeric dataset. Install Matplotlib. Try plt. Types of Plots Function Description 5. Matplotlib provides hist2d() as part of the matplotlib. bar(df. For example, let’s say that you have the following data about the age of 100 individuals: Matplotlib is a Sponsored Project of NumFOCUS, a 501(c)(3) nonprofit charity in the United States. Let's change the color of each bar based on its y value. but I will include it here for your The following are code examples for showing how to use numpy. Python Matplotlib – Histogram. In this tutorial, we will see how to use the Matplotlib library to learn how to report and chart using the Python matplotlib library. We find the counts of each intensity value from 0–255 and then add each subsequent counts, if i = 0 then H(i) = h(0) else H(i) = H(i-1) + h(0) Cumulative histograms are useful in many image processing applications like histogram equalization and so on. I have a list probability = [0. In order to make a Matplotlib's histogram will default to using 10 bins, as the figure below shows. Matplotlib’s histogram will default to using 10 bins, as the figure below shows. Nov 02, 2017 · Examples of matplotlib codes and plots. Dec 07, 2017 · This matplotlib tutorial shows how to plot histograms. So if you happen to be familiar with matlab, matplotlib will feel natural to you. Here we need to understand the difference between bar graph and histogram, In bar graphs are basically we used to display categorical data that is data that fits into different data sets. show() Here is the same data visualized as a 3D histogram (here we use only 20 bins for efficiency). Installing Matplotlib First, install Matplotlib. Let's start by defining what a histogram is. Jul 11, 2011 · Basic Data Plotting with Matplotlib Part 3: Histograms. Using this, we can edit the histogram to our liking. randn(10000) # the histogram of the data n, bins, Demonstrates how to plot histograms with matplotlib. histogram() and is the basis for Pandas’ plotting functions. matplotlib documentation: Boxplot function. pyplot as plt fig = plt. hist() function creates histogram plots. matplotlib: plotting with Python. seed(19680801) # example Matplotlib histogram is used to visualize the frequency distribution of numeric array. It took me a 1 Nov 2018 Manage bins of different sizes while plotting Histogram in Matplotlib. For color image, you can pass [0], [1] or [2] to calculate histogram of blue, green or red channel respectively. py] import numpy as np import seaborn as sns import matplotlib. 99. John D. (Remember, for 1D histogram, we converted from BGR to Grayscale). 3602150537634409, 0. Sep 19, 2019 · Plot date histogram To plot the number of records per unit of time, you must first convert the date column to datetime using pandas. Data Visualization with Matplotlib and Python; Matplotlib histogram example Below we show the most minimal It is the index of channel for which we calculate histogram. The following example script is an attempt to do this. For example, we can obtain the red color channel by calling r_chan In this Tutorial we will learn how to create Histogram in python using matplotlib with an example. ) Nov 23, 2017 · In the last post I talked about bar graphs and their implementation in Matplotlib. pyplot. This post will explain how to make a histogram in Python using matplotlib. It is an estimate of the probability distribution of a continuous variable. Matplotlib, and especially its object-oriented framework, is great for fine-tuning the details of a histogram. If you wish to override the default colours used by pyplot (for example, to make it easier to colourblind people to view your images), you can use set_prop_cycle() on an Axes instance: From version 1. , in order to provide object-oriented APIs for embedding plots into applications. hist(data) plt. histogram() function that is a graphical representation of the frequency distribution of data. mask : mask image. There are several ways to go about installing matplotlib, some of which will depend on the system you are using. So, change: bins = 20 In this video, we will learn about another visualization tool: the histogram, and we will learn how to create it using Matplotlib. We can use matplotlib’s plt object and specify the the scale of x-axis using “xscale=’log’ function. NumPy - Histogram Using Matplotlib - NumPy has a numpy. Set custom color cycle. It is quite simple and calculated using the same function, cv. org/examples/ 2 Apr 2019 In this article, you'll learn how to use Python matplotlib for data visualization. matplotlib documentation: Simple histogram. randn(1000) plt. The steps in this recipe are divided into the following Matplotlib is a 2D plotting library which can be used to generate publication quality figures. Define a function for a histogram def histogram(data, x_label, Online tutorial for MatPlotLib Library for Python. figure () Here is the matplotlib Matplotlib - bar,scatter and histogram plots Simple bar plot¶ import numpy as np import matplotlib. Feb 08, 2018 · Note that the sum of the histogram values will not be equal to 1 unless bins of unity width are chosen; it is not a probability mass function. We could have also passed a NumPy array with the same data As the charts get more complex, the more the code you’ve got to write. use('ggplot') for ggplot Nov 09, 2016 · We can plot this as a histogram using the matplotlib. Matplotlib has its own implementation of boxplot. Please note that the histogram does not follow the Cartesian convention where x values are on the abscissa and y values on the ordinate axis. In this tutorial we will do data analysis of blood sugar levels of different patients Python Programming tutorials from beginner to advanced on a massive variety of topics. You get the idea. Tutorial contains examples of Line Plots, Scatter Plots, Histograms and Customization of plots. Watch it together with the written tutorial to deepen your understanding: Python Plotting With Matplotlib A picture is worth a thousand words, and with Python’s matplotlib library, it fortunately takes far less Histogram Overview: A Histogram is a vertical bar chart. If you are lucky, you will be able to use a package manager to easily install the matplotlib module and its dependencies. hist the histogram axis will be set to a log scale. For example, if input is grayscale image, its value is [0]. They are from open source Python projects. Objective. Aug 04, 2019 · In the example you provide, bins is returned by the hist command, whereas in your code, bins is a number that you defined as 20. hist() is a widely used histogram plotting function that uses np. Specifically, you’ll be using pandas hist() method, which is simply a wrapper for the matplotlib pyplot API. Share bins between histograms¶. The following script demonstrates how to use the Matplotlib Python module to render a histogram on top the three-dimensional visualization. 19 Jun 2019 They are widely used for line chart, bar chart, histogram, pie-chart etc. net/examples/pylab_examples/histogram_demo_extended. 25 Sep 2019 A histogram can be created using the Matplotlib library and the hist() function. 42028985507246375, 0. html. to_datetime() . The importance of a histogram is how information is grouped together so that it can be compared and analyzed. Dec 04, 2019 · Matplotlib makes use of many general-purpose GUI toolkits, such as wxPython, Tkinter, QT, etc. See for example #8105. An array of weights, of the same shape as a. A simple histogram can be created with matplotlib using the function hist(), example: Note: see for Find histograms, using both OpenCV and Numpy functions; Plot histograms, using OpenCV and Matplotlib functions; You will see these functions : cv2. For example, a function creates a figure, a plotting area in a figure, plots some lines in a plotting area, decorates the plot with labels, etc. animation package offer some classes for creating animations. In the above plot, I have displayed the comparison between the distance covered by two cars BMW and Audi over a period of 5 days. Matplotlib also able to create simple plots with just a few commands and along with limited 3D graphic A histogram is used for the distribution, whereas a bar chart is used to compare different entities. It was developed by John Hunter in 2002. If you do not explicitly choose a color, then, despite doing multiple plots, all bars will look the same. The Figure is complete window or the page the graph is drawn upon. The Axes is the area on which data is plotted. pyplot is a collection of command style functions that make Matplotlib work like MATLAB. pyplot as plt np. To find histogram of full image, it is given as "None". MatPlotLib Tutorial. Code for reproduction from datetime import datetime from matplotlib import pyplot as plt plt. create step type (no fill) and bar type (fill) histograms. Apply a style sheet in Matplotlib; Plot multiple stacked bar in the same figure; How to set the direction of pie chart in Python Matplotlib? Adjust marker sizes and colors in Scatter Plot; Plot half polar graph in Matplotlib; Change the color of specific bar on the histogram; Plot histogram basic example in Matplotlib; Horizontal stacked bar 2D Histogram in OpenCV . This example is used as a demonstration of how simple it is to construct a graph plot along with simple customisations that come with it. Clearly pdf contains floating point numbers, but I am unable to access them. In this article, we explore practical techniques that are extremely useful in your initial data analysis and plotting. A histogram shows the frequency on the vertical axis and the horizontal axis is another dimension. For example, in matplotlib, there is no direct method to draw a density plot of a scatterplot with line of best fit. pyplot module's hist() function. NumFOCUS provides Matplotlib with fiscal, legal, and administrative support to help ensure the health and sustainability of the project. For a 2D In addition to the basic histogram, this demo shows a few optional features: numpy as np import matplotlib. show(). like histogram facets, density plots, plotting multiple histograms in same plot. We pass it the dem_share column of the DataFrame. A 2D Histogram is useful when there is lot of data in a bivariate distribution. Dec 28, 2018 · Matplotlib is the “grandfather” library of data visualization with Python. 0. NumPy - Matplotlib - Matplotlib is a plotting library for Python. The relevant aspects of this function is that, by default, the boxplot is showing the median (percentile 50%) with a red line. mlab as mlab import matplotlib. For example: Let's say that I have an array 1000 items long. name year battle_number attacker_king defender_king attacker_1 attacker_2 attacker_3 The following script, all negative data, works fine for me: from matplotlib. figure () Here is the matplotlib Here, we demonstrate the types of plots which can be drawn with Python Matplotlib. Related course Histograms are a useful type of statistics plot for engineers. All kwargs besides the input histograms are passed on to histogram. pylab_examples example code: histogram_demo. The code is based on this matplotlib demo. So is there an easy way to generate the histograms from the numpy. matplotlib documentation: Simple Legend. Matplotlib is a library for making 2D plots of arrays in Python. To plot a 2D histogram the length of X data and Y data should be equal. In Pandas, we can create a Histogram with the plot. Setting the style can be used to easily give plots the general look that you want. pyplot as plt df = pd . In our example, you’re going to be visualizing the distribution of session duration for a website. It can help you to get an idea about the distribution of your variables. If log is True and x is a 1D array, empty bins will be filtered out and only the non-empty Updating histogram colors¶ The histogram method returns (among other things) a patches object. hist method. This python Histogram tutorial also includes the steps to create Histogram with step type (no fills) and bar type (with fills). Demo of the histogram (hist) function with a few features¶ In addition to the basic histogram, this demo shows a few optional features: Setting the number of data bins. hist(). Nov 09, 2016 · In this video, I'll introduce the histogram. A histogram is a type of bar plot that shows the frequency of a number of values compared to a set of values ranges. Histogram plots created using histogram have a context menu in plot edit mode that enables interactive manipulations in the figure window. While X-axis of the histogram describes the interval of the data that is start value and end value of the data, the Y axis of a histogram describes the frequencies of such data. Donations to Matplotlib are managed by NumFOCUS. Let me first tell you the difference between a bar graph and a histogram. The output of the above code snippet is matplotlib. This gives us a change to cover a new Matplotlib Hi, I would like to access values in the bins of a matplotlib histogram. figure Below is an example of histogram plot. bar creates the bar chart for us. The plt. hist(), on each series in the DataFrame, resulting in one histogram per column. Earlier, we saw a preview of Matplotlib's histogram function (see Comparisons, Masks, and Boolean Logic), which creates a basic histogram in one line, once the normal boiler-plate imports are done: Dec 02, 2019 · Matplotlib is immense, as it is a handy plotting tool and its numerical extension NumPy. In this post I am going to discuss Histograms, a special kind of bar graphs. Types of Matplotlib Plots. It is easy to install python matplotlib library with pip: pip install matplotlib That’s it! def to_root_hist(histogram, **kwargs): """Convert Eskapade histogram to root histogram Input Eskapade histogram first gets converted to a numpy histogram, which is then converted to a root histogram. For example, you can use the context menu to interactively change the number of bins, align multiple histograms, or change the display order. 2D Histogram simplifies visualizing the areas where the frequency of variables is dense. I am trying to plot a histogram using the matplotlib. I only import numpy to generate the data x to be plotted. This can be X-Axis or Y-Axis etc. hist([1, 2, 2, 3, 4, 4, 4, 4, 4, 5, 5], range = (0, 5), bins = 5) : histogramme entre 4 Jan 2017 Example: Creating Visualizations in Matplotlib Using a Bikeshare System . Python code example 'Plot a histogram with specified intervals' for the package matplotlib, powered by Kite. Example. This interface can take a bit of time to master, but ultimately allows you to be very precise in how I know this does not answer your question, but I always end up on this page, when I search for the matplotlib solution to histograms, because the simple histogram_demo was removed from the matplotlib example gallery page. This gives us access to the properties of the objects drawn. Hunter was the person who originally wrote Matplotlib, and its lead developer was Michael Droettboom. org for more information. Here we use a function animate() that changes the coordinates of a point on the graph of a sine function. Dec 20, 2017 · Histograms In MatPlotLib. Units) – snorthway Nov 26 '14 at 20:01 I would like to create four subplots of pictures made with the hist() function, using matplotlib, pyplot and/or numpy. pyplot To generate a 1D histogram we only need a single vector of numbers. Python Matplotlib is a plotting library for the Python programming language and its numerical mathematics extension NumPy. It is used along with NumPy to provide an environment that is an effective open source alternative for MatLab. In this example I The cumulative histogram is a special histogram that can be derived from the normal histogram. Contribute to rasbt/matplotlib-gallery development by creating an account on GitHub. This page provides Python code examples for matplotlib. Now, bin This recipe will show you how to go about creating a histogram using Python. pyplot as plt sns. pyplot as plt mu, sigma = 100, 15 x = mu + sigma*np. Let’s look at the some of the visualization to understand below behavior of variable(s) . The below example shows how to draw the histogram and densities ( distplot ) If you want a histogram, you don't need to attach any 'names' to x-values, as on x- axis you would have bins: import matplotlib. Simple Graph. For example we take the data of the different age group of the people and plot a histogram with respect to the bin. 1000 samples are generated from a gaussian The following are code examples for showing how to use matplotlib. A simple histogram can be a great first step in understanding a dataset. from mpl_toolkits. histogram() output itself, without redoing the calculations (and having to save the inputs)? To be clear, the numpy. He created it to try to replicate MatLab’s (another programming language) plotting capabilities in Python. Hello - I'm creating a histogram with a negative data values (30 values between works for you (if not upgrade matplotlib), and then go back to your example. In addition to plotting Take a look at the following example: 2 déc. Python has library like matplotlib and seaborn to create multiple graphs effectively. set John Hunter schrieb: > On Fri, Aug 7, 2009 at 4:10 AM, Bernd Eggink<monoped@> wrote: > >> being a complete newbie, I tried to run the simple_plot example from the >> website with matplotlib-0. In the example above we grouped the data by country and then took the mean of the wine prices 4 Sep 2019 Matplotlib is a plotting library for the Python programming language and its Bar Graph; Histogram; Scatter Plot; Line Plot; 3D plot; Area Plot Special arguments line , marker , and fill will automatically figure out what arguments to set (for example, we are setting the linestyle , linewidth , and color 16 Dec 2018 In python's matplotlib we can also plot the histogram using the defaults: spines, offset): """ This is mostly from https://matplotlib. Installation and Setup. How to Plot scatter with marker size in Matplotlib? Create legend with bubble size using Numpy and Matplotlib; Example of plot a pie chart in Python Matplotlib; Save plot to image file using Python Matplotlib; How to draw bar chart with group data in X-axis with Matplotlib? How to plot a line graph in Matplotlib? Boxplot adjust bottom and left Make a histogram of the DataFrame’s. sourceforge. The data example of plotting a histogram of a random sample. It was created by John Hunter. Apr 09, 2015 · Part 5: How to create plots (Histogram, Scatter, Box Plot)? Data visualization always helps to understand the data easily. use(my_plot_style) before creating your plot. In this example both histograms have a compatible bin settings using bingroup attribute. Matplotlib Histogram. hist matplotlib, pylab, example, codex (see Search examples Matplotlib can be used to create histograms. Here is an example that… The following are code examples for showing how to use matplotlib. A histogram is an accurate graphical matplotlib. Data for this example is generated using numpy. 6 Apr 2012 Hi everyone, does an example exist for the implementation of a continuous updated diagram with matplotlib? I want to plot a histogram of the 11 Jul 2011 Getting Started with a simple example. Matplotlib histogram is used to visualize the frequency distribution of numeric array by splitting it to small equal-sized bins. text(). Example import matplotlib. (I am not entirely sure what the differences between these things are. The matplotlib. FuncAnimation creates animations by repeatedly calling a function. The Spines are the lines which connects Axes points. Histograms are used to plot frequency of a variable. Now we can move on Histogram. Here is a solution, which doesn't require numpy to be imported. If you want to plot two things against each other, you probably just want a bar chart. #83 adjust bin size of 2D histogram This page is dedicated to 2D histograms made with matplotlib , through the hist2D function. The matplotlib library comes with several built in styles. See the documentation of the weights parameter to draw a histogram of import matplotlib. matlab import * x = randn(1000)-10 hist(x, 10) show() Make sure this example works for you (if not upgrade matplotlib), and then go back to your example. As you use the function pie() for display pie chart, in the same way, You use the function hist() to display histogram chart. The normed flag, which normalizes bin heights so that the integral of the histogram is 1. All video and text tutorials are free. Example: Data plot. Each value in a only contributes its associated weight towards the bin count (instead of 1). For 2D histograms, its parameters will be modified as follows: Watch Now This tutorial has a related video course created by the Real Python team. So, what you can do instead is to use a higher level package like seaborn, and use one of its prebuilt functions to draw the plot. 5 and up, matplotlib offers a range of pre-configured plotting styles. The maximum of bins this Python Histogram Plotting: NumPy, Matplotlib, Pandas & Seaborn . Get started visualizing data in Python using Matplotlib, Pandas and Seaborn. In this Tutorial we will learn how to create Histogram in python using matplotlib with an example. calcHist() This example shows how to use a path patch to draw a bunch of rectangles for an animated histogram """ import numpy as np import matplotlib. Clicking on any of the above links will take you to the relevant section in Jul 11, 2018 · Above plot is portrayed the difference between the two vehicles over a period of 5 days. hist([dateti Dec 28, 2017 · memory leak with histograms #10123. ipynbextension (stands for the IPython notebook) is displayed in the new tab of the browser. A histogram is a type of bar plot that shows the frequency or number of values compared to a set of value ranges. For color histograms, we need to convert the image from BGR to HSV. hist() . pyplot as plt # Define numbers of generated data points and bins per axis. The most common example that we come across is the histogram of an image where we try to estimate the probability distribution of colors. histogram2d(). Now the histogram above is much better with easily readable labels. hist() function but I am not sure how to do it. For example you could write matplotlib. pyplot as plt import numpy as np # generate 1000 data points with normal distribution data = np. pyplot as plt Matplotlib provides a dedicated function to compute and display histograms: plt. http://matplotlib. When normed is True, then the returned histogram is the sample density, defined such that the sum over bins of the product bin_value * bin_area is 1. Aug 04, 2019 · The example is in the link I posted. One of it’s most important features is the ability to perform well with many operating systems and graphics backends. A Histogram has continuous intervals in the X-axis and the frequencies in the Y-axis. By framing numbers Python Matplotlib Terminology. hist Compute and draw the histogram of x. Tag: matplotlib Matplotlib Histogram Matplotlib can be used to create histograms. 28 Jun 2014 There's even a huge example plot gallery right on the matplotlib web site, . Matplotlib - bar,scatter and histogram plots Simple bar plot¶ import numpy as np import matplotlib. matplotlib histogram example