def light_filter_pie(ax):
fracs = [15,30,45, 10]
explode=(0, 0.05, 0, 0)
pies = ax.pie(fracs, explode=explode)
ax.patch.set_visible(True)
light_filter = LightFilter(9)
for p in pies[0]:
p.set_agg_filter(light_filter)
p.set_rasterized(True) # to support mixed-mode renderers
p.set(ec="none",
lw=2)
gauss = DropShadowFilter(9, offsets=(3,4), alpha=0.7)
shadow = FilteredArtistList(pies[0], gauss)
ax.add_artist(shadow)
shadow.set_zorder(pies[0][0].get_zorder()-0.1)
def filtered_text(ax):
# mostly copied from contour_demo.py
# prepare image
delta = 0.025
x = np.arange(-3.0, 3.0, delta)
y = np.arange(-2.0, 2.0, delta)
X, Y = np.meshgrid(x, y)
Z1 = mlab.bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0)
Z2 = mlab.bivariate_normal(X, Y, 1.5, 0.5, 1, 1)
# difference of Gaussians
Z = 10.0 * (Z2 - Z1)
# draw
im = ax.imshow(Z, interpolation='bilinear', origin='lower',
cmap=cm.gray, extent=(-3,3,-2,2))
levels = np.arange(-1.2, 1.6, 0.2)
CS = ax.contour(Z, levels,
origin='lower',
linewidths=2,
extent=(-3,3,-2,2))
ax.set_aspect("auto")
# contour label
cl = ax.clabel(CS, levels[1::2], # label every second level
inline=1,
fmt='%1.1f',
fontsize=11)
# change clable color to black
from matplotlib.patheffects import Normal
for t in cl:
t.set_color("k")
t.set_path_effects([Normal()]) # to force TextPath (i.e., same font in all backends)
# Add white glows to improve visibility of labels.
white_glows = FilteredArtistList(cl, GrowFilter(3))
ax.add_artist(white_glows)
white_glows.set_zorder(cl[0].get_zorder()-0.1)
ax.xaxis.set_visible(False)
ax.yaxis.set_visible(False)
def drop_shadow_line(ax):
# copyed from examples/misc/svg_filter_line.py
# draw lines
l1, = ax.plot([0.1, 0.5, 0.9], [0.1, 0.9, 0.5], "bo-",
mec="b", mfc="w", lw=5, mew=3, ms=10, label="Line 1")
l2, = ax.plot([0.1, 0.5, 0.9], [0.5, 0.2, 0.7], "ro-",
mec="r", mfc="w", lw=5, mew=3, ms=10, label="Line 1")
gauss = DropShadowFilter(4, offsets=(4, -6))
shadow = FilteredArtistList([l1, l2], gauss)
ax.add_artist(shadow)
shadow.set_zorder(l1.get_zorder()-0.1)
ax.set_xlim(0., 1.)
ax.set_ylim(0., 1.)
ax.xaxis.set_visible(False)
ax.yaxis.set_visible(False)
def drop_shadow_patches(ax):
# copyed from barchart_demo.py
N = 5
menMeans = (20, 35, 30, 35, 27)
ind = np.arange(N) # the x locations for the groups
width = 0.35 # the width of the bars
rects1 = ax.bar(ind, menMeans, width, color='r', ec="w", lw=2)
womenMeans = (25, 32, 34, 20, 25)
rects2 = ax.bar(ind+width+0.1, womenMeans, width, color='y', ec="w", lw=2)
gauss = DropShadowFilter(5, offsets=(1,1), )
shadow = FilteredArtistList(rects1+rects2, gauss)
ax.add_artist(shadow)
shadow.set_zorder(rects1[0].get_zorder()-0.1)
ax.set_xlim(ind[0]-0.5, ind[-1]+1.5)
ax.set_ylim(0, 40)
ax.xaxis.set_visible(False)
ax.yaxis.set_visible(False)
