MatPlotLib - Graphs

This MatPlotLib library enables you to create visual representations of data using list data.

Basics

Import Statement

import matplotlib.pyplot as plt

Plot Data

plt.plot([1, 2, 3, 4]) // one series

plt.plot([1, 2, 3, 4], [1, 4, 9, 16]) / x and y coordinates

Graph Types - Examples https://python-graph-gallery.com/matplotlib/

plt.bar(name, values)

plt.scatter(names, values)

Plot Labels

plt.title('title of graph')

plt.ylabel('some numbers')

plt.xlable('x label')

For every x, y pair of arguments, there is an optional third argument which is the format string that indicates the color and the line type of the plot. 

'b'    # blue markers with default shape

'ro'   # red circles

'g-'   # green solid line

'--'   # dashed line with default color

'k^:'  # black triangle_up markers connected by a dotted line

Save the Plot as an Image

//plot name, file name to save as

plt.savefig('foo.png')

Example Plot

import matplotlib.pyplot as plt

plt.plot([1, 2, 3, 4], [1, 4, 9, 16], 'ro')

plt.axis([0, 6, 0, 20])

plt.savefig('foo.png')