.. 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_interpolation_methods.py: ================================= Interpolations for imshow/matshow ================================= This example displays the difference between interpolation methods for :meth:`~.axes.Axes.imshow` and :meth:`~.axes.Axes.matshow`. If `interpolation` is None, it defaults to the ``image.interpolation`` :doc:`rc parameter `. If the interpolation is ``'none'``, then no interpolation is performed for the Agg, ps and pdf backends. Other backends will default to ``'nearest'``. For the Agg, ps and pdf backends, ``interpolation = 'none'`` works well when a big image is scaled down, while ``interpolation = 'nearest'`` works well when a small image is scaled up. .. code-block:: python import matplotlib.pyplot as plt import numpy as np methods = [None, 'none', 'nearest', 'bilinear', 'bicubic', 'spline16', 'spline36', 'hanning', 'hamming', 'hermite', 'kaiser', 'quadric', 'catrom', 'gaussian', 'bessel', 'mitchell', 'sinc', 'lanczos'] # Fixing random state for reproducibility np.random.seed(19680801) grid = np.random.rand(4, 4) fig, axs = plt.subplots(nrows=3, ncols=6, figsize=(9.3, 6), subplot_kw={'xticks': [], 'yticks': []}) fig.subplots_adjust(left=0.03, right=0.97, hspace=0.3, wspace=0.05) for ax, interp_method in zip(axs.flat, methods): ax.imshow(grid, interpolation=interp_method, cmap='viridis') ax.set_title(str(interp_method)) plt.tight_layout() plt.show() .. image:: /gallery/images_contours_and_fields/images/sphx_glr_interpolation_methods_001.png :class: sphx-glr-single-img ------------ References """""""""" The use of the following functions and methods is shown in this example: .. code-block:: python import matplotlib matplotlib.axes.Axes.imshow matplotlib.pyplot.imshow .. _sphx_glr_download_gallery_images_contours_and_fields_interpolation_methods.py: .. only :: html .. container:: sphx-glr-footer :class: sphx-glr-footer-example .. container:: sphx-glr-download :download:`Download Python source code: interpolation_methods.py ` .. container:: sphx-glr-download :download:`Download Jupyter notebook: interpolation_methods.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature Keywords: matplotlib code example, codex, python plot, pyplot `Gallery generated by Sphinx-Gallery `_