matplotlib:更改标题和颜色栏文本以及刻度线颜色

问题描述

我想知道如何更改颜色栏中刻度的颜色以及如何更改图形中标题和颜色栏的字体颜色.例如，东西显然在 temp.png 中可见，但在 temp2.​​png 中不可见:

I wanted to know how to change the color of the ticks in the colorbar and how to change the font color of the title and colorbar in a figure. For example, things obviously are visible in temp.png but not in temp2.png:

import matplotlib.pyplot as plt
import numpy as np
from numpy.random import randn

fig = plt.figure()
data = np.clip(randn(250,250),-1,1)
cax = plt.imshow(data, interpolation='nearest')
plt.title('my random fig')
plt.colorbar()

# works fine
plt.savefig('temp.png')
# title and colorbar ticks and text hidden
plt.savefig('temp2.png', facecolor="black", edgecolor="none")

谢谢

推荐答案

这可以通过在 matplotlib 中检查和设置对象处理程序的属性来完成.

This can be done by inspecting and setting properties for object handler in matplotlib.

我编辑了您的代码并在评论中添加了一些解释:

I edited your code and put some explanation in comment:

import matplotlib.pyplot as plt
import numpy as np
from numpy.random import randn

fig = plt.figure()
data = np.clip(randn(250,250),-1,1)
cax = plt.imshow(data, interpolation='nearest')

title_obj = plt.title('my random fig') #get the title property handler
plt.getp(title_obj)                    #print out the properties of title
plt.getp(title_obj, 'text')            #print out the 'text' property for title
plt.setp(title_obj, color='r')         #set the color of title to red

axes_obj = plt.getp(cax,'axes')                 #get the axes' property handler
ytl_obj = plt.getp(axes_obj, 'yticklabels')     #get the properties for
                                                #  yticklabels
plt.getp(ytl_obj)                               #print out a list of properties
                                                #  for yticklabels
plt.setp(ytl_obj, color="r")                    #set the color of yticks to red

plt.setp(plt.getp(axes_obj, 'xticklabels'), color='r') #xticklabels: same

color_bar = plt.colorbar()                            #this one is a little bit
cbytick_obj = plt.getp(color_bar.ax.axes, 'yticklabels')                #tricky
plt.setp(cbytick_obj, color='r')

plt.savefig('temp.png')
plt.savefig('temp2.png', facecolor="black", edgecolor="none")

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