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Commit 8aadd0a

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author
Egor Panfilov
committed
Refactored annotation_demoX examples
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‎examples/pylab_examples/annotation_demo.py

Copy file name to clipboardExpand all lines: examples/pylab_examples/annotation_demo.py
+89-99Lines changed: 89 additions & 99 deletions
Original file line numberDiff line numberDiff line change
@@ -39,104 +39,94 @@
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import numpy as np
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if 1:
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# if only one location is given, the text and xypoint being
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# annotated are assumed to be the same
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fig = plt.figure()
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ax = fig.add_subplot(111, autoscale_on=False, xlim=(-1, 5), ylim=(-3, 5))
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t = np.arange(0.0, 5.0, 0.01)
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s = np.cos(2*np.pi*t)
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line, = ax.plot(t, s)
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ax.annotate('figure pixels',
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xy=(10, 10), xycoords='figure pixels')
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ax.annotate('figure points', xy=(80, 80),
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xycoords='figure points')
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ax.annotate('point offset from data', xy=(2, 1),
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xycoords='data',
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xytext=(-15, 25), textcoords='offset points',
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arrowprops=dict(facecolor='black', shrink=0.05),
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horizontalalignment='right', verticalalignment='bottom',
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)
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ax.annotate('axes fraction', xy=(3, 1), xycoords='data',
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xytext=(0.8, 0.95), textcoords='axes fraction',
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arrowprops=dict(facecolor='black', shrink=0.05),
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horizontalalignment='right', verticalalignment='top',
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)
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ax.annotate('figure fraction', xy=(.025, .975),
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xycoords='figure fraction',
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horizontalalignment='left', verticalalignment='top',
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fontsize=20)
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# use negative points or pixels to specify from right, top -10, 10
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# is 10 points to the left of the right side of the axes and 10
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# points above the bottom
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ax.annotate('pixel offset from axes fraction', xy=(1, 0),
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xycoords='axes fraction',
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xytext=(-20, 20),
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textcoords='offset pixels',
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horizontalalignment='right',
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verticalalignment='bottom')
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if 1:
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# you can specify the xypoint and the xytext in different
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# positions and coordinate systems, and optionally turn on a
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# connecting line and mark the point with a marker. Annotations
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# work on polar axes too. In the example below, the xy point is
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# in native coordinates (xycoords defaults to 'data'). For a
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# polar axes, this is in (theta, radius) space. The text in this
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# example is placed in the fractional figure coordinate system.
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# Text keyword args like horizontal and vertical alignment are
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# respected
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fig = plt.figure()
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ax = fig.add_subplot(111, projection='polar')
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r = np.arange(0, 1, 0.001)
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theta = 2*2*np.pi*r
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line, = ax.plot(theta, r)
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ind = 800
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thisr, thistheta = r[ind], theta[ind]
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ax.plot([thistheta], [thisr], 'o')
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ax.annotate('a polar annotation',
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xy=(thistheta, thisr), # theta, radius
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xytext=(0.05, 0.05), # fraction, fraction
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textcoords='figure fraction',
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arrowprops=dict(facecolor='black', shrink=0.05),
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horizontalalignment='left',
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verticalalignment='bottom',
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)
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if 1:
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# You can also use polar notation on a cartesian axes. Here the
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# native coordinate system ('data') is cartesian, so you need to
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# specify the xycoords and textcoords as 'polar' if you want to
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# use (theta, radius)
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el = Ellipse((0, 0), 10, 20, facecolor='r', alpha=0.5)
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fig = plt.figure()
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ax = fig.add_subplot(111, aspect='equal')
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ax.add_artist(el)
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el.set_clip_box(ax.bbox)
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ax.annotate('the top',
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xy=(np.pi/2., 10.), # theta, radius
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xytext=(np.pi/3, 20.), # theta, radius
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xycoords='polar',
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textcoords='polar',
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arrowprops=dict(facecolor='black', shrink=0.05),
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horizontalalignment='left',
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verticalalignment='bottom',
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clip_on=True, # clip to the axes bounding box
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)
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ax.set_xlim(-20, 20)
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ax.set_ylim(-20, 20)
42+
# If only one location is given, the text and xypoint being
43+
# annotated are assumed to be the same
44+
fig = plt.figure()
45+
ax = fig.add_subplot(111, autoscale_on=False, xlim=(-1, 5), ylim=(-3, 5))
46+
47+
t = np.arange(0.0, 5.0, 0.01)
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s = np.cos(2*np.pi*t)
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line, = ax.plot(t, s)
50+
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ax.annotate('figure pixels',
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xy=(10, 10), xycoords='figure pixels')
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ax.annotate('figure points',
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xy=(80, 80), xycoords='figure points')
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ax.annotate('point offset from data',
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xy=(2, 1), xycoords='data',
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xytext=(-15, 25), textcoords='offset points',
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arrowprops=dict(facecolor='black', shrink=0.05),
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horizontalalignment='right', verticalalignment='bottom')
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63+
ax.annotate('axes fraction',
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xy=(3, 1), xycoords='data',
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xytext=(0.8, 0.95), textcoords='axes fraction',
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arrowprops=dict(facecolor='black', shrink=0.05),
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horizontalalignment='right', verticalalignment='top')
68+
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ax.annotate('figure fraction',
70+
xy=(.025, .975), xycoords='figure fraction',
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horizontalalignment='left', verticalalignment='top',
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fontsize=20)
73+
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# use negative points or pixels to specify from right, top -10, 10
75+
# is 10 points to the left of the right side of the axes and 10
76+
# points above the bottom
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ax.annotate('pixel offset from axes fraction',
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xy=(1, 0), xycoords='axes fraction',
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xytext=(-20, 20), textcoords='offset pixels',
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horizontalalignment='right',
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verticalalignment='bottom')
82+
83+
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# You can specify the xypoint and the xytext in different positions and
85+
# coordinate systems, and optionally turn on a connecting line and mark
86+
# the point with a marker. Annotations work on polar axes too.
87+
# In the example below, the xy point is in native coordinates (xycoords
88+
# defaults to 'data'). For a polar axes, this is in (theta, radius) space.
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# The text in the example is placed in the fractional figure coordinate system.
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# Text keyword args like horizontal and vertical alignment are respected.
91+
fig = plt.figure()
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ax = fig.add_subplot(111, projection='polar')
93+
r = np.arange(0, 1, 0.001)
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theta = 2*2*np.pi*r
95+
line, = ax.plot(theta, r)
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ind = 800
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thisr, thistheta = r[ind], theta[ind]
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ax.plot([thistheta], [thisr], 'o')
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ax.annotate('a polar annotation',
101+
xy=(thistheta, thisr), # theta, radius
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xytext=(0.05, 0.05), # fraction, fraction
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textcoords='figure fraction',
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arrowprops=dict(facecolor='black', shrink=0.05),
105+
horizontalalignment='left',
106+
verticalalignment='bottom')
107+
108+
109+
# You can also use polar notation on a cartesian axes. Here the native
110+
# coordinate system ('data') is cartesian, so you need to specify the
111+
# xycoords and textcoords as 'polar' if you want to use (theta, radius).
112+
113+
el = Ellipse((0, 0), 10, 20, facecolor='r', alpha=0.5)
114+
115+
fig = plt.figure()
116+
ax = fig.add_subplot(111, aspect='equal')
117+
ax.add_artist(el)
118+
el.set_clip_box(ax.bbox)
119+
ax.annotate('the top',
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xy=(np.pi/2., 10.), # theta, radius
121+
xytext=(np.pi/3, 20.), # theta, radius
122+
xycoords='polar',
123+
textcoords='polar',
124+
arrowprops=dict(facecolor='black', shrink=0.05),
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horizontalalignment='left',
126+
verticalalignment='bottom',
127+
clip_on=True) # clip to the axes bounding box
128+
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ax.set_xlim([-20, 20])
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ax.set_ylim([-20, 20])
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plt.show()

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