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Bug fix and general touch ups for hist3d_demo example (#1702) #6260

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merged 2 commits into from
Apr 2, 2016
Merged

Bug fix and general touch ups for hist3d_demo example (#1702) #6260

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9b9ed32
Issue #1702 transpose bugfix
TrishGillett Mar 16, 2016
4340a91
Fix bin range and tidy up comments.
TrishGillett Apr 2, 2016
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Issue #1702 transpose bugfix
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@TrishGillett
TrishGillett committed Apr 1, 2016
commit 9b9ed321ba4af06ea2fdcaaa9cbbf1026cacbba8
10 changes: 6 additions & 4 deletions examples/mplot3d/hist3d_demo.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,6 @@
# Note: np.meshgrid produces arrays in (ny, nx), so flatten is called with 'F'.
# For numpy >= 1.7, this can be avoided by calling meshgrid with indexing='ij'.

from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import numpy as np
Expand All @@ -7,12 +10,11 @@
x, y = np.random.rand(2, 100) * 4
hist, xedges, yedges = np.histogram2d(x, y, bins=4)

elements = (len(xedges) - 1) * (len(yedges) - 1)
xpos, ypos = np.meshgrid(xedges[:-1] + 0.25, yedges[:-1] + 0.25)
xpos = xpos.flatten('F')
ypos = ypos.flatten('F')
zpos = np.zeros_like(xpos)

xpos = xpos.flatten()
ypos = ypos.flatten()
zpos = np.zeros(elements)
dx = 0.5 * np.ones_like(zpos)
dy = dx.copy()
dz = hist.flatten()
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