Syntax error How to set the number of ticks in plt.colorbar in Matplotlib?

How to set the number of ticks in plt.colorbar in Matplotlib?

To set the number of ticks in a colorbar, we can take the following steps−

  • Create random data using numpy
  • Display the data as an image, i.e., on a 2D regular raster.
  • Make a colorbar using colorbar() method with an image scalar mappable object.
  • Set the ticks and tick labels of the colorbar using set_ticks() and set_ticklabels() methods.
  • 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.rand(4, 4)
im = plt.imshow(data, cmap="copper")
cbar = plt.colorbar(im)
cbar.set_ticks([0.2, 0.4, 0.6, 0.8])
cbar.set_ticklabels(["A", "B", "C", "D"])
plt.show()

Output

Updated on: 2021-05-15T12:30:17+05:30

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