10000 STY: update with use of plt.subplots(), other readability edits by mscross · Pull Request #4361 · matplotlib/matplotlib · GitHub
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STY: update with use of plt.subplots(), other readability edits #4361

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Apr 21, 2015
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STY: update with use of plt.subplots(), other readability edits #4361

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29 changes: 15 additions & 14 deletions examples/images_contours_and_fields/pcolormesh_levels.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@
y, x = np.mgrid[slice(1, 5 + dy, dy),
slice(1, 5 + dx, dx)]

z = np.sin(x) ** 10 + np.cos(10 + y * x) * np.cos(x)
z = np.sin(x)**10 + np.cos(10 + y*x) * np.cos(x)

# x and y are bounds, so z should be the value *inside* those bounds.
# Therefore, remove the last value from the z array.
Expand All @@ -31,22 +31,23 @@
cmap = plt.get_cmap('PiYG')
norm = BoundaryNorm(levels, ncolors=cmap.N, clip=True)

plt.subplot(2, 1, 1)
im = plt.pcolormesh(x, y, z, cmap=cmap, norm=norm)
plt.colorbar()
# set the limits of the plot to the limits of the data
plt.axis([x.min(), x.max(), y.min(), y.max()])
plt.title('pcolormesh with levels')
fig, (ax0, ax1) = plt.subplots(nrows=2)

im = ax0.pcolormesh(x, y, z, cmap=cmap, norm=norm)
fig.colorbar(im, ax=ax0)
ax0.set_title('pcolormesh with levels')


plt.subplot(2, 1, 2)
# contours are *point* based plots, so convert our bound into point
# centers
plt.contourf(x[:-1, :-1] + dx / 2.,
y[:-1, :-1] + dy / 2., z, levels=levels,
cmap=cmap)
plt.colorbar()
plt.title('contourf with levels')

cf = ax1.contourf(x[:-1, :-1] + dx/2.,
y[:-1, :-1] + dy/2., z, levels=levels,
cmap=cmap)
fig.colorbar(cf, ax=ax1)
ax1.set_title('contourf with levels')

# adjust spacing between subplots so `ax1` title and `ax0` tick labels
# don't overlap
fig.tight_layout()

plt.show()
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