matplotlib matshow labels

Question

I start using matplotlib a month ago, so I\'m still learning.
I\'m trying to do a heatmap with matshow. My code is the following:

data = numpy.array(a).resha         


        

Answer 1

The other way to do this is to specify the ticks, and then set the corresponding labels. Then you don't have to worry about the extra out of bounds tick. This comes up in lots of matplotlib demos. So here, note the extra calls the ax.set_xticks and ax.set_yticks

import numpy as np
import matplotlib.pyplot as plt

alpha = ['ABC', 'DEF', 'GHI', 'JKL']

data = np.random.random((4,4))

fig = plt.figure()
ax = fig.add_subplot(111)
cax = ax.matshow(data, interpolation='nearest')
fig.colorbar(cax)

xaxis = np.arange(len(alpha))
ax.set_xticks(xaxis)
ax.set_yticks(xaxis)
ax.set_xticklabels(alpha)
ax.set_yticklabels(alpha)

plt.show()