Matplotlib

A simple line graph

import matplotlib.pyplot as plt
a=[1,2,3,4,5]
b=[100,25,70,80,100]
plt.plot(a,b)
plt.show()

A bar graph

import matplotlib.pyplot as plt
a=[1,2,3,4,5]
b=[100,25,70,80,100]
fig = plt.figure()
ax = fig.add_subplot(111)
ax.bar(a,b)
plt.savefig("graph.png")

Two bar diagrams beside

• bar(left, height, width)

• Can be single values or arrays

import numpy as np
import matplotlib.pyplot as plt

a=[1,2,3,4,5]
b=[100,25,70,80,100]
c=[90,35,80,80,90]

width=0.25
fig = plt.figure()
ax = fig.add_subplot(111)

plt.bar(np.array(a), b, width, color="r")
plt.bar(np.array(a) + width, c, width)
plt.show()