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Set two Matplotlib imshow plots to have the same colormap scale
To set two matplotlib imshow() plots to have the same colormap scale, we can take the following
Steps
- Set the figure size and adjust the padding between and around the subplots.
- Create d1 and d2 matrices using Numpy.
- Get the resultant matrix to get the maximum and minmum value.
- Use amin and amax methods for minimum and maximum values.
- Create a new figure or activate an existing figure.
- Add an '~.axes.Axes' to the figure as part of a subplot arrangement, with nrows=1, ncols=2 at index 1
- Using imshow() method with vmin and vmax, define the data range that the colormap covers.
- Repeat steps 6 and 7 with data
- To display the figure, use show() method.
Example
import numpy as np from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True data1 = np.random.randn(4, 4) data2 = np.random.randn(4, 4) resultant = np.array([data1, data2]) min_val, max_val = np.amin(resultant), np.amax(resultant) fig = plt.figure() ax = fig.add_subplot(1, 2, 1) ax.imshow(data1, cmap="plasma", vmin=min_val, vmax=max_val) ax2 = fig.add_subplot(1, 2, 2) ax2.imshow(data2, cmap="plasma", vmin=min_val, vmax=max_val) plt.show()
Output
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