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pylab_examples example code: agg_buffer_to_array.pyΒΆ

(Source code)

import matplotlib
from pylab import figure, show
import numpy as np

# make an agg figure
fig = figure()
ax = fig.add_subplot(111)
ax.set_title('a simple figure')

# grab the pixel buffer and dump it into a numpy array
buf = fig.canvas.buffer_rgba()
l, b, w, h = fig.bbox.bounds
# The array needs to be copied, because the underlying buffer
# may be reallocated when the window is resized.
X = np.frombuffer(buf, np.uint8).copy()
X.shape = h,w,4

# now display the array X as an Axes in a new figure
fig2 = figure()
ax2 = fig2.add_subplot(111, frameon=False)

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