[英]How do I format axis ticks to be a certain color based on sign?
您可以使用軸的ax.get_yticklabels()和ax.get_yticks()方法來完成此操作...
import numpy as np
import pylab as plt
import pandas as pd
# figure data
np.random.seed([3,1415])
# create the plot
ax = plt.figure().gca()
ax.plot(pd.Series(np.random.randn(100)).add(.1).cumsum())
# change the y-axis label colors based on positive/negative
a = [ax.get_yticklabels()[i].set_color('red') if (ax.get_yticks()[i] < 0 ) else ax.get_yticklabels()[i].set_color('green') if ( ax.get_yticks()[i] > 0 ) else ax.get_yticklabels()[i].set_color('black') for i in range(len(ax.get_yticklabels()))]
上面使用列表推導[a如果A否則b否則b否則c為列表]。
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