Add legend to colorbar

import matplotlib.pyplot as plt
import numpy as np
from matplotlib.colors import ListedColormap

#discrete color scheme
cMap = ListedColormap(['white', 'green', 'blue','red'])

#data
np.random.seed(42)
data = np.random.rand(4, 4)
fig, ax = plt.subplots()
heatmap = ax.pcolor(data, cmap=cMap)

#legend
cbar = plt.colorbar(heatmap)
cbar.ax.set_yticklabels(['0','1','2','>3'])
cbar.set_label('# of contacts', rotation=270)

# put the major ticks at the middle of each cell
ax.set_xticks(np.arange(data.shape[1]) + 0.5, minor=False)
ax.set_yticks(np.arange(data.shape[0]) + 0.5, minor=False)
ax.invert_yaxis()

#labels
column_labels = list('ABCD')
row_labels = list('WXYZ')
ax.set_xticklabels(column_labels, minor=False)
ax.set_yticklabels(row_labels, minor=False)

plt.show()

Source: stackoverflow.com

Similar codes

0 vote193 views1 answer
Django save another class data while saving a class
Python
0 vote197 views1 answer
Snake water gun game in python
Python
0 vote276 views1 answer
How i dynamically populate to CORS_ALLOWED_ORIGINS in django rest framework
Python Django
0 vote236 views1 answer
Locate certs path for python
Python
11 votes195 views2 answers
Find data in sheet pandas
Python
10 votes183 views5 answers
Pandas strip whitespace
Python
0 vote179 views1 answer
Cairo.context transform vertical text python
Python
0 vote190 views1 answer
Df groupby loop
Python
0 vote207 views1 answer
How to change dtype object to int
Python
0 vote248 views1 answer
How to populate an image to template in django from views
Python Django