Top label for Matplotlib colorbars

To place a top label for colorbars, we can use colorbar's axis to set the title.

Steps

• Create random data using numpy.
• Use imshow() method to represent data into an image, with colormap "PuBuGn" and interpolation= "nearest".
• Create a colorbar for a scalar mappable instance, im
• Set the title on the ax (of colorbar) using set_title() method.
• To display the figure, use show() method.

Example

import numpy as np
from matplotlib import pyplot as plt
plt.rcParams["figure.figsize"] = [7.00, 3.50]
plt.rcParams["figure.autolayout"] = True
data = np.random.randn(4, 4)
im = plt.imshow(data, interpolation='nearest', cmap="PuBuGn")
clb = plt.colorbar(im)
clb.ax.set_title('Color Bar Title')
plt.show()

Output