.. 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_layer_images.py:
============
Layer Images
============
Layer images above one another using alpha blending
.. code-block:: default
import matplotlib.pyplot as plt
import numpy as np
def func3(x, y):
return (1 - x / 2 + x**5 + y**3) * np.exp(-(x**2 + y**2))
# make these smaller to increase the resolution
dx, dy = 0.05, 0.05
x = np.arange(-3.0, 3.0, dx)
y = np.arange(-3.0, 3.0, dy)
X, Y = np.meshgrid(x, y)
# when layering multiple images, the images need to have the same
# extent. This does not mean they need to have the same shape, but
# they both need to render to the same coordinate system determined by
# xmin, xmax, ymin, ymax. Note if you use different interpolations
# for the images their apparent extent could be different due to
# interpolation edge effects
extent = np.min(x), np.max(x), np.min(y), np.max(y)
fig = plt.figure(frameon=False)
Z1 = np.add.outer(range(8), range(8)) % 2 # chessboard
im1 = plt.imshow(Z1, cmap=plt.cm.gray, interpolation='nearest',
extent=extent)
Z2 = func3(X, Y)
im2 = plt.imshow(Z2, cmap=plt.cm.viridis, alpha=.9, interpolation='bilinear',
extent=extent)
plt.show()
.. image:: /gallery/images_contours_and_fields/images/sphx_glr_layer_images_001.png
:alt: layer images
:class: sphx-glr-single-img
------------
References
""""""""""
The use of the following functions and methods is shown
in this example:
.. code-block:: default
import matplotlib
matplotlib.axes.Axes.imshow
matplotlib.pyplot.imshow
.. rst-class:: sphx-glr-script-out
Out:
.. code-block:: none
.. _sphx_glr_download_gallery_images_contours_and_fields_layer_images.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: layer_images.py `
.. container:: sphx-glr-download sphx-glr-download-jupyter
:download:`Download Jupyter notebook: layer_images.ipynb `
.. only:: html
.. rst-class:: sphx-glr-signature
Keywords: matplotlib code example, codex, python plot, pyplot
`Gallery generated by Sphinx-Gallery
`_