Plot a colorbar along with the image#

This example shows how to plot a colorbar besides the brain.

../_images/plot_colorbar_5_0.png

Example data

The example data is a NumPy array combining masked data of both hemispheres, based on a face-selectivity map from Jiahui et al. (2020) Figure 5.

import numpy as np
from brainplotlib import brain_plot, example_data
import matplotlib.pyplot as plt

print(example_data.shape, example_data.dtype)

(18742,) float64

Get color scale information

The return_scale parameter allows returning the color scale information along with the image itself, which can then be used by plt.colorbar.

img, scale = brain_plot(
    example_data, vmax=10, vmin=-10, cmap='seismic', return_scale=True)

fig = plt.figure(
    figsize=(img.shape[1] / 300, img.shape[0] / 300), dpi=300)
plt.imshow(img)
plt.axis('off')
cbar = plt.colorbar(scale, shrink=0.8, aspect=30)
plt.show()

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