Matplotlib中的极坐标图是一半还是四分之一? [英] Half or quarter polar plots in Matplotlib?

问题描述

我正在尝试制作一个极坐标图，而不是Matplotlib中的360度坐标图，它类似于

I am trying to make a polar plot that goes 180 degrees instead of 360 in Matplotlib similar to http://www.mathworks.com/matlabcentral/fileexchange/27230-half-polar-coordinates-figure-plot-function-halfpolar in MATLAB. Any ideas?

解决方案

The following works in matplotlib 2.1 or higher. There is also an example on the matplotlib page.
You may use a usual polar plot, ax = fig.add_subplot(111, polar=True) and confine the theta range. For a half polar plot

ax.set_thetamin(0)
ax.set_thetamax(180)

or for a quarter polar plot

ax.set_thetamin(0)
ax.set_thetamax(90)

Complete example:

import matplotlib.pyplot as plt
import numpy as np

theta = np.linspace(0,np.pi)
r = np.sin(theta)

fig = plt.figure()
ax = fig.add_subplot(111, polar=True)
c = ax.scatter(theta, r, c=r, s=10, cmap='hsv', alpha=0.75)

ax.set_thetamin(0)
ax.set_thetamax(180)

plt.show()

这篇关于Matplotlib中的极坐标图是一半还是四分之一?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！