1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
"""
==========
Polar plot
==========
Demo of a line plot on a polar axis.
The second plot shows the same data, but with the radial axis starting at r=1
and the angular axis starting at 0 degrees and ending at 225 degrees. Setting
the origin of the radial axis to 0 allows the radial ticks to be placed at the
same location as the first plot.
"""
import matplotlib.pyplot as plt
import numpy as np
r = np.arange(0, 2, 0.01)
theta = 2 * np.pi * r
fig, axs = plt.subplots(2, 1, figsize=(5, 8), subplot_kw={'projection': 'polar'},
layout='constrained')
ax = axs[0]
ax.plot(theta, r)
ax.set_rmax(2)
ax.set_rticks([0.5, 1, 1.5, 2]) # Fewer radial ticks
ax.set_rlabel_position(-22.5) # Move radial labels away from plotted line
ax.grid(True)
ax.set_title("A line plot on a polar axis", va='bottom')
ax = axs[1]
ax.plot(theta, r)
ax.set_rmax(2)
ax.set_rmin(1) # Change the radial axis to only go from 1 to 2
ax.set_rorigin(0) # Set the origin of the radial axis to 0
ax.set_thetamin(0)
ax.set_thetamax(225)
ax.set_rticks([1, 1.5, 2]) # Fewer radial ticks
ax.set_rlabel_position(-22.5) # Move radial labels away from plotted line
ax.grid(True)
ax.set_title("Same plot, but with reduced axis limits", va='bottom')
plt.show()
# %%
#
# .. admonition:: References
#
# The use of the following functions, methods, classes and modules is shown
# in this example:
#
# - `matplotlib.axes.Axes.plot` / `matplotlib.pyplot.plot`
# - `matplotlib.projections.polar`
# - `matplotlib.projections.polar.PolarAxes`
# - `matplotlib.projections.polar.PolarAxes.set_rticks`
# - `matplotlib.projections.polar.PolarAxes.set_rmin`
# - `matplotlib.projections.polar.PolarAxes.set_rorigin`
# - `matplotlib.projections.polar.PolarAxes.set_rmax`
# - `matplotlib.projections.polar.PolarAxes.set_rlabel_position`
#
# .. tags::
#
# plot-type: polar
# level: beginner
|
