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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

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<title>Long chain of connections using Sankey — Matplotlib 2.0.2.post4416.dev0+g1df513f documentation</title>

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<h1>Long chain of connections using Sankey<a class="headerlink" href="#long-chain-of-connections-using-sankey" title="Permalink to this headline">¶</a></h1>

Demonstrate/test the Sankey class by producing a long chain of connections.

<div class="highlight-python"><div class="highlight"><pre>from itertools import cycle

import matplotlib.pyplot as plt

from matplotlib.sankey import <a href="../../api/sankey_api.html#matplotlib.sankey.Sankey" title="View documentation for matplotlib.sankey.Sankey">Sankey</a>

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],

prior=prior + i, connect=(1, 0), alpha=0.5)

def corner(sankey):

"""Generate a corner link."""

sankey.add(flows=[1, -1], orientations=[0, 1],

patchlabel=str(prior), facecolor='k',

prior=prior - 1, connect=(1, 0), alpha=0.5)

fig = <a href="../../api/_as_gen/matplotlib.figure.figaspect.html#matplotlib.figure" title="View documentation for matplotlib.pyplot.figure">plt.figure</a>()

ax = fig.add_subplot(1, 1, 1, xticks=[], yticks=[],

title="Why would you want to do this?\n(But you could.)")

sankey = <a href="../../api/sankey_api.html#matplotlib.sankey.Sankey" title="View documentation for matplotlib.sankey.Sankey">Sankey</a>(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)

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.

<a href="../../api/_as_gen/matplotlib.pyplot.show.html#matplotlib.pyplot.show" title="View documentation for matplotlib.pyplot.show">plt.show</a>()

</pre></div>

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Total running time of the script: ( 0 minutes 0.108 seconds)

<a class="reference download internal" href="../../_downloads/sankey_links.py" download=""><code class="xref download docutils literal">Download Python source code: sankey_links.py</code></a></div>

<a class="reference download internal" href="../../_downloads/sankey_links.ipynb" download=""><code class="xref download docutils literal">Download Jupyter notebook: sankey_links.ipynb</code></a></div>

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