.. DO NOT EDIT. .. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY. .. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE: .. "gallery/images_contours_and_fields/image_zcoord.py" .. LINE NUMBERS ARE GIVEN BELOW. .. only:: html .. note:: :class: sphx-glr-download-link-note Click :ref:`here ` to download the full example code .. rst-class:: sphx-glr-example-title .. _sphx_glr_gallery_images_contours_and_fields_image_zcoord.py: ================================== 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, but it is still useful to show how to customize the `~.axes.Axes.format_coord` function. .. GENERATED FROM PYTHON SOURCE LINES 12-39 .. code-block:: default import numpy as np import matplotlib.pyplot as plt # Fixing random state for reproducibility np.random.seed(19680801) X = 10*np.random.rand(5, 3) fig, ax = plt.subplots() ax.imshow(X) numrows, numcols = X.shape def format_coord(x, y): col = int(x + 0.5) row = int(y + 0.5) if 0 <= col < numcols and 0 <= row < numrows: z = X[row, col] return 'x=%1.4f, y=%1.4f, z=%1.4f' % (x, y, z) else: return 'x=%1.4f, y=%1.4f' % (x, y) ax.format_coord = format_coord plt.show() .. image:: /gallery/images_contours_and_fields/images/sphx_glr_image_zcoord_001.png :alt: image zcoord :class: sphx-glr-single-img .. GENERATED FROM PYTHON SOURCE LINES 40-47 .. admonition:: References The use of the following functions, methods, classes and modules is shown in this example: - `matplotlib.axes.Axes.format_coord` - `matplotlib.axes.Axes.imshow` .. _sphx_glr_download_gallery_images_contours_and_fields_image_zcoord.py: .. only :: html .. container:: sphx-glr-footer :class: sphx-glr-footer-example .. container:: sphx-glr-download sphx-glr-download-python :download:`Download Python source code: image_zcoord.py ` .. container:: sphx-glr-download sphx-glr-download-jupyter :download:`Download Jupyter notebook: image_zcoord.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature Keywords: matplotlib code example, codex, python plot, pyplot `Gallery generated by Sphinx-Gallery `_