Version 3.1.2
matplotlib

Table of Contents

Related Topics

Ellipse Collection

Drawing a collection of ellipses. While this would equally be possible using a EllipseCollection or PathCollection, the use of an EllipseCollection allows for much shorter code.

==================
Ellipse Collection
==================

Drawing a collection of ellipses. While this would equally be possible using
a `~.collections.EllipseCollection` or `~.collections.PathCollection`, the use
of an `~.collections.EllipseCollection` allows for much shorter code.
"""
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.collections import EllipseCollection

x = np.arange(10)
y = np.arange(15)
X, Y = np.meshgrid(x, y)

XY = np.column_stack((X.ravel(), Y.ravel()))

ww = X / 10.0
hh = Y / 15.0
aa = X * 9


fig, ax = plt.subplots()

ec = EllipseCollection(ww, hh, aa, units='x', offsets=XY,
                       transOffset=ax.transData)
ec.set_array((X + Y).ravel())
ax.add_collection(ec)
ax.autoscale_view()
ax.set_xlabel('X')
ax.set_ylabel('y')
cbar = plt.colorbar(ec)
cbar.set_label('X+Y')
plt.show()
Traceback (most recent call last):
  File "/build/matplotlib-mO9dyQ/matplotlib-3.1.2/examples/shapes_and_collections/ellipse_collection.py", line 1
    ==================
    ^
SyntaxError: invalid syntax

References

The use of the following functions, methods, classes and modules is shown in this example:

import matplotlib
matplotlib.collections
matplotlib.collections.EllipseCollection
matplotlib.axes.Axes.add_collection
matplotlib.axes.Axes.autoscale_view
matplotlib.cm.ScalarMappable.set_array

Keywords: matplotlib code example, codex, python plot, pyplot Gallery generated by Sphinx-Gallery