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Python Matplotlib Library

Let’s learn about the Python Matplotlib Library in this tutorial. The Python Matplotlib Library provides many interfaces and functionality for 2D graphics.

Python Matplotlib Library

Matplotlib is a high-quality plotting library that enables programmers to create 2D plots and graphs. We can use PyPlot to construct plots. PyPlot is a collection of methods within the Matplotlib library that allows users to construct plots easily.

Import PyPlot

To use PyPlot methods, we need to import it. We can import and use Pyplot in the following ways:

Syntax

The general syntax to import PyPlot is:

import matplotlib.pyplot as <alias>

In this alternative approach, we must issue every pyplot command

matplotlib.pyplot.<command>

Example

In this example, we will import the matplotlib module in the program.

# Line chart using PyPlot
# Python Tutorials – www.TestingDocs.com

import matplotlib.pyplot as pypt

# Define two lists
a=[12,25,37,49]
b=[210,43,650,187]

# Plotting the data
pypt.plot(a,b,’b’)
pypt.show()

Python Matplotlib Library

Notice that we have provided pypt alias as the shorthand for matplotlib.pyplot. We can invoke PyPlot’s methods using the alias. For example, to plot the two lists, a and b, we can use the following plot command:

pypt.plot(a , b)

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