CODEWITHSUNDEEP
pythonmatplotlibgradientpatchimshow
Xeno6x
Xeno6x

Reputation: 85

How to fill a circle with a gradient?

Is there a way to fill a circle created by :

ax.add_patch(ptc.Circle(.....)

with a vertical gradient from a colormap :

grad = cm.get_cmap('plasma', 100)

The expected output:

expected output

I don't know how to do this, but according to the picture someone got it with imshow ().

Thanks

Upvotes: 1

Views: 1814

Answers (1)

JohanC
JohanC

Reputation: 80329

You can draw an image and set a clip path:

import numpy as np
import matplotlib.pyplot as plt

x, y, r = 0, 35, 25
fig, ax = plt.subplots()
img = ax.imshow(np.linspace(0, 1, 256).reshape(-1, 1), cmap='plasma',
                extent=[x - r, x + r, y - r, y + r], origin='lower')
circle = plt.Circle((x, y), r, transform=ax.transData)
img.set_clip_path(circle)
ax.use_sticky_edges = False
ax.margins(x=0.05, y=0.05)
plt.show()

resulting plot

Upvotes: 4

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