在 matplotlib 中优雅地改变图框的颜色 [英] Elegantly changing the color of a plot frame in matplotlib

问题描述

这是讨论；全局变化，而不是局部变化.我想要一些其他不同颜色的图.请不要讨论绘图中的太多颜色... :-)

matplotlib.rc('axes',edgecolor='green')

挖出轴的刺，然后改变它:也讨论过这里;我觉得不是很优雅.

 for child in ax.get_children():如果是实例(孩子，matplotlib.spines.Spine):child.set_color('#dddddd')

<块引用>

有没有一种优雅的方式来压缩上面的块，一些东西更pythonic"?

我在 ubuntu 下使用 python 2.6.5 和 matplotlib 0.99.1.1.

解决方案

重构上面的代码:

将 matplotlib.pyplot 导入为 plt对于 ax，zip 中的颜色([ax1, ax2, ax3, ax4], ['green', 'green', 'blue', 'blue']):plt.setp(ax.spines.values()，颜色=颜色)plt.setp([ax.get_xticklines(), ax.get_yticklines()], 颜色=颜色)

This is a kind of follow-up question to this post, where the coloring of axes, ticks and labels was discussed. I hope it is alright to open a new, extended question for this.

Changing the color of a complete frame (ticks and axes) around a double-plot (via add_subplot) with axes [ax1, ax2] results in a lot of code. This snippet changes the color of the frame of the upper plot:

ax1.spines['bottom'].set_color('green')
ax1.spines['top'].set_color('green')
ax1.spines['left'].set_color('green')
ax1.spines['right'].set_color('green')
for t in ax1.xaxis.get_ticklines(): t.set_color('green')
for t in ax1.yaxis.get_ticklines(): t.set_color('green')
for t in ax2.xaxis.get_ticklines(): t.set_color('green')
for t in ax2.yaxis.get_ticklines(): t.set_color('green')

So for changing the frame color of two plots with two y-axes each, I would need 16(!) lines of code... This is how it looks like:

Other methods I dug up so far:

• matplotlib.rc: discussed here; changes globally, not locally. I want to have some other plots in different colors. Please, no discussions about too many colors in plots... :-)

  matplotlib.rc('axes',edgecolor='green')
  

• dig out the spines of the axis, then change it: also discussed here; not really elegant, I think.

  for child in ax.get_children():
      if isinstance(child, matplotlib.spines.Spine):
          child.set_color('#dddddd')
  

Is there an elegant way of condensing the above block, something more "pythonic"?

I'm using python 2.6.5 with matplotlib 0.99.1.1 under ubuntu.

解决方案

Refactoring your code above:

import matplotlib.pyplot as plt

for ax, color in zip([ax1, ax2, ax3, ax4], ['green', 'green', 'blue', 'blue']):
    plt.setp(ax.spines.values(), color=color)
    plt.setp([ax.get_xticklines(), ax.get_yticklines()], color=color)

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