Modifying the coordinate formatter#

Modify the coordinate formatter to report the image "z" value of the nearest pixel given x and y. This functionality is built in by default; this example just showcases how to customize the format_coord function.

import numpy as np
import matplotlib.pyplot as plt

# Fixing random state for reproducibility

X = 10*np.random.rand(5, 3)

fig, ax = plt.subplots()

def format_coord(x, y):
    col = round(x)
    row = round(y)
    nrows, ncols = X.shape
    if 0 <= col < ncols and 0 <= row < nrows:
        z = X[row, col]
        return f'x={x:1.4f}, y={y:1.4f}, z={z:1.4f}'
        return f'x={x:1.4f}, y={y:1.4f}'

ax.format_coord = format_coord
image zcoord


The use of the following functions, methods, classes and modules is shown in this example:

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