如何將笛卡爾坐標軸添加到 matplotlib 中的極坐標圖中？

Question

我有一個極地等高線圖，我想向其中添加笛卡爾軸。 我怎樣才能做到這一點？ 似乎沒有這方面的文檔。

import numpy as np
import matplotlib.pyplot as plt

def f(x, y):
    return np.sin(x) ** 10 + np.cos(10 + y * x) * np.cos(x)

x = np.linspace(0, 8, 50)
y = np.linspace(0, 8, 40)

X, Y = np.meshgrid(x, y)
Z = f(X, Y)

fig, ax = plt.subplots(subplot_kw = dict(projection = 'polar'))
plt.axis('off')
ax.contourf(X, Y, Z)

Answer 1

要將笛卡爾坐標軸添加到極坐標圖中，您所要做的就是在相同位置添加第二對坐標軸，如下所示：

import numpy as np
import matplotlib.pyplot as plt

def f(x, y):
    return np.sin(x) ** 10 + np.cos(10 + y * x) * np.cos(x)

x = np.linspace(0, 8, 50)
y = np.linspace(0, 8, 40)

X, Y = np.meshgrid(x, y)
Z = f(X, Y)

fig, ax = plt.subplots(subplot_kw = dict(projection = 'polar'))
plt.axis('off')
ax.contourf(X, Y, Z)

new_axis = fig.add_axes(ax.get_position(), frameon = False)
new_axis.plot()
plt.show()