.. _api-sankey_demo_links: api example code: sankey_demo_links.py ====================================== .. plot:: /home/tcaswell/src/p/matplotlib/doc/mpl_examples/api/sankey_demo_links.py :: """ ====================================== Long chain of connections using Sankey ====================================== Demonstrate/test the Sankey class by producing a long chain of connections. """ from itertools import cycle import matplotlib.pyplot as plt from matplotlib.sankey import Sankey links_per_side = 6 def side(sankey, n=1): """Generate a side chain.""" prior = len(sankey.diagrams) for i in range(0, 2*n, 2): sankey.add(flows=[1, -1], orientations=[-1, -1], patchlabel=str(prior + i), prior=prior + i - 1, connect=(1, 0), alpha=0.5) sankey.add(flows=[1, -1], orientations=[1, 1], patchlabel=str(prior + i + 1), prior=prior + i, connect=(1, 0), alpha=0.5) def corner(sankey): """Generate a corner link.""" prior = len(sankey.diagrams) sankey.add(flows=[1, -1], orientations=[0, 1], patchlabel=str(prior), facecolor='k', prior=prior - 1, connect=(1, 0), alpha=0.5) fig = plt.figure() ax = fig.add_subplot(1, 1, 1, xticks=[], yticks=[], title="Why would you want to do this?\n(But you could.)") sankey = Sankey(ax=ax, unit=None) sankey.add(flows=[1, -1], orientations=[0, 1], patchlabel="0", facecolor='k', rotation=45) side(sankey, n=links_per_side) corner(sankey) side(sankey, n=links_per_side) corner(sankey) side(sankey, n=links_per_side) corner(sankey) side(sankey, n=links_per_side) sankey.finish() # Notice: # 1. The alignment doesn't drift significantly (if at all; with 16007 # subdiagrams there is still closure). # 2. The first diagram is rotated 45 deg, so all other diagrams are rotated # accordingly. plt.show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)