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api example code: patch_collection.pyΒΆ

(Source code, png, hires.png, pdf)

../../_images/patch_collection.png
import numpy as np
import matplotlib
from matplotlib.patches import Circle, Wedge, Polygon
from matplotlib.collections import PatchCollection
import matplotlib.pyplot as plt


fig, ax = plt.subplots()

resolution = 50 # the number of vertices
N = 3
x       = np.random.rand(N)
y       = np.random.rand(N)
radii   = 0.1*np.random.rand(N)
patches = []
for x1,y1,r in zip(x, y, radii):
    circle = Circle((x1,y1), r)
    patches.append(circle)

x       = np.random.rand(N)
y       = np.random.rand(N)
radii   = 0.1*np.random.rand(N)
theta1  = 360.0*np.random.rand(N)
theta2  = 360.0*np.random.rand(N)
for x1,y1,r,t1,t2 in zip(x, y, radii, theta1, theta2):
    wedge = Wedge((x1,y1), r, t1, t2)
    patches.append(wedge)

# Some limiting conditions on Wedge
patches += [
    Wedge((.3,.7), .1, 0, 360),             # Full circle
    Wedge((.7,.8), .2, 0, 360, width=0.05), # Full ring
    Wedge((.8,.3), .2, 0, 45),              # Full sector
    Wedge((.8,.3), .2, 45, 90, width=0.10), # Ring sector
]

for i in range(N):
    polygon = Polygon(np.random.rand(N,2), True)
    patches.append(polygon)

colors = 100*np.random.rand(len(patches))
p = PatchCollection(patches, cmap=matplotlib.cm.jet, alpha=0.4)
p.set_array(np.array(colors))
ax.add_collection(p)
plt.colorbar(p)

plt.show()

Keywords: python, matplotlib, pylab, example, codex (see Search examples)