.. 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_api_sankey_links.py: ====================================== Long chain of connections using Sankey ====================================== Demonstrate/test the Sankey class by producing a long chain of connections. .. image:: /gallery/api/images/sphx_glr_sankey_links_001.png :class: sphx-glr-single-img .. code-block:: python 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() .. _sphx_glr_download_gallery_api_sankey_links.py: .. only :: html .. container:: sphx-glr-footer :class: sphx-glr-footer-example .. container:: sphx-glr-download :download:`Download Python source code: sankey_links.py ` .. container:: sphx-glr-download :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 `_