.. 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_lines_bars_and_markers_fill_betweenx_demo.py: ================== Fill Betweenx Demo ================== Using `~.Axes.fill_betweenx` to color along the horizontal direction between two curves. .. rst-class:: sphx-glr-horizontal * .. image:: /gallery/lines_bars_and_markers/images/sphx_glr_fill_betweenx_demo_001.png :class: sphx-glr-multi-img * .. image:: /gallery/lines_bars_and_markers/images/sphx_glr_fill_betweenx_demo_002.png :class: sphx-glr-multi-img .. code-block:: default import matplotlib.pyplot as plt import numpy as np y = np.arange(0.0, 2, 0.01) x1 = np.sin(2 * np.pi * y) x2 = 1.2 * np.sin(4 * np.pi * y) fig, [ax1, ax2, ax3] = plt.subplots(1, 3, sharey=True, figsize=(6, 6)) ax1.fill_betweenx(y, 0, x1) ax1.set_title('between (x1, 0)') ax2.fill_betweenx(y, x1, 1) ax2.set_title('between (x1, 1)') ax2.set_xlabel('x') ax3.fill_betweenx(y, x1, x2) ax3.set_title('between (x1, x2)') # now fill between x1 and x2 where a logical condition is met. Note # this is different than calling # fill_between(y[where], x1[where], x2[where]) # because of edge effects over multiple contiguous regions. fig, [ax, ax1] = plt.subplots(1, 2, sharey=True, figsize=(6, 6)) ax.plot(x1, y, x2, y, color='black') ax.fill_betweenx(y, x1, x2, where=x2 >= x1, facecolor='green') ax.fill_betweenx(y, x1, x2, where=x2 <= x1, facecolor='red') ax.set_title('fill_betweenx where') # Test support for masked arrays. x2 = np.ma.masked_greater(x2, 1.0) ax1.plot(x1, y, x2, y, color='black') ax1.fill_betweenx(y, x1, x2, where=x2 >= x1, facecolor='green') ax1.fill_betweenx(y, x1, x2, where=x2 <= x1, facecolor='red') ax1.set_title('regions with x2 > 1 are masked') # This example illustrates a problem; because of the data # gridding, there are undesired unfilled triangles at the crossover # points. A brute-force solution would be to interpolate all # arrays to a very fine grid before plotting. plt.show() .. _sphx_glr_download_gallery_lines_bars_and_markers_fill_betweenx_demo.py: .. only :: html .. container:: sphx-glr-footer :class: sphx-glr-footer-example .. container:: sphx-glr-download :download:`Download Python source code: fill_betweenx_demo.py ` .. container:: sphx-glr-download :download:`Download Jupyter notebook: fill_betweenx_demo.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature Keywords: matplotlib code example, codex, python plot, pyplot `Gallery generated by Sphinx-Gallery `_