相关疑难解决方法(0)

有人可以解释为什么设置图形的facecolor时下面的代码不起作用？

import matplotlib.pyplot as plt

# create figure instance
fig1 = plt.figure(1)
fig1.set_figheight(11)
fig1.set_figwidth(8.5)

rect = fig1.patch
rect.set_facecolor('red') # works with plt.show().  
                          # Does not work with plt.savefig("trial_fig.png")

ax = fig1.add_subplot(1,1,1)

x = 1, 2, 3
y = 1, 4, 9
ax.plot(x, y)

# plt.show()  # Will show red face color set above using rect.set_facecolor('red')

plt.savefig("trial_fig.png") # The saved trial_fig.png DOES NOT have the red facecolor.

# plt.savefig("trial_fig.png", facecolor='red') # Here the facecolor is red.

当我指定使用fig1.set_figheight(11) fig1.set_figwidth(8.5)这些图的高度和宽度时,由命令拾取plt.savefig("trial_fig.png") …

我一直在玩Matplotlib,我无法弄清楚如何改变图形的背景颜色,或者如何使背景完全透明.