极轴上的图例

极轴图上的图例演示。

import matplotlib.pyplot as plt
import numpy as np
# radar green, solid grid lines
plt.rc('grid', color='#316931', linewidth=1, linestyle='-')
plt.rc('xtick', labelsize=15)
plt.rc('ytick', labelsize=15)
# force square figure and square axes looks better for polar, IMO
fig = plt.figure(figsize=(8, 8))
ax = fig.add_axes([0.1, 0.1, 0.8, 0.8],
                  projection='polar', facecolor='#d5de9c')
r = np.arange(0, 3.0, 0.01)
theta = 2 * np.pi * r
ax.plot(theta, r, color='#ee8d18', lw=3, label='a line')
ax.plot(0.5 * theta, r, color='blue', ls='--', lw=3, label='another line')
ax.legend()
plt.show()

参考

此示例显示了以下函数、方法、类和模块的使用：

import matplotlib
matplotlib.axes.Axes.plot
matplotlib.axes.Axes.legend
matplotlib.projections.polar
matplotlib.projections.polar.PolarAxes

下载这个示例

• 下载python源码: polar_legend.py
• 下载Jupyter notebook: polar_legend.ipynb