.. 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_specialty_plots_sankey_links.py:
======================================
Long chain of connections using Sankey
======================================
Demonstrate/test the Sankey class by producing a long chain of connections.
.. code-block:: default
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()
.. image:: /gallery/specialty_plots/images/sphx_glr_sankey_links_001.png
:class: sphx-glr-single-img
------------
References
""""""""""
The use of the following functions, methods, classes and modules is shown
in this example:
.. code-block:: default
import matplotlib
matplotlib.sankey
matplotlib.sankey.Sankey
matplotlib.sankey.Sankey.add
matplotlib.sankey.Sankey.finish
.. rst-class:: sphx-glr-script-out
Out:
.. code-block:: none
.. _sphx_glr_download_gallery_specialty_plots_sankey_links.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: sankey_links.py `
.. container:: sphx-glr-download sphx-glr-download-jupyter
:download:`Download Jupyter notebook: sankey_links.ipynb `
.. only:: html
.. rst-class:: sphx-glr-signature
Keywords: matplotlib code example, codex, python plot, pyplot
`Gallery generated by Sphinx-Gallery
`_