.. _api-span_regions: api example code: span_regions.py ================================= .. plot:: /home/tcaswell/other_source/matplotlib/doc/mpl_examples/api/span_regions.py :: """ Illustrate some helper functions for shading regions where a logical mask is True See :meth:`matplotlib.collections.BrokenBarHCollection.span_where` """ import numpy as np import matplotlib.pyplot as plt import matplotlib.collections as collections t = np.arange(0.0, 2, 0.01) s1 = np.sin(2*np.pi*t) s2 = 1.2*np.sin(4*np.pi*t) fig, ax = plt.subplots() ax.set_title('using span_where') ax.plot(t, s1, color='black') ax.axhline(0, color='black', lw=2) collection = collections.BrokenBarHCollection.span_where( t, ymin=0, ymax=1, where=s1>0, facecolor='green', alpha=0.5) ax.add_collection(collection) collection = collections.BrokenBarHCollection.span_where( t, ymin=-1, ymax=0, where=s1<0, facecolor='red', alpha=0.5) ax.add_collection(collection) plt.show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)