Matplotlib:图例中用颜色编码的文本，而不是一行 [英] Matplotlib: Color-coded text in legend instead of a line

问题描述

在某些LCD监视器上，图例中水平线的颜色很难区分. (请参见附件).因此，除了在图例中画一条线以外，是否可以仅对文本本身进行颜色编码?所以换句话说，蓝色为"y = 0x"，绿色为"y = 1x"，等等...

On certain LCD monitors, the color of the horizontal lines in the legend is hard to tell apart. (See the image attached). So instead of drawing a line in the legend, is it possible to just color code the text itself? so another words, have "y=0x" in blue, "y=1x" in green, etc...

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(10)

fig = plt.figure()
ax = plt.subplot(111)

for i in xrange(5):
    ax.plot(x, i * x, label='$y = %ix$' % i)

ax.legend()

plt.show()

PS.如果可以仅在图例中而不是在情节中将线变粗，这也将起作用.

PS. if the line could be made thicker just in the legend, but not in the plot, this would also work.

推荐答案

只需设置图例句柄的linewidth:

In [55]: fig, ax = plt.subplots()

In [56]: x = np.arange(10)

In [57]: for i in xrange(5):                    
   ....:     ax.plot(x, i * x, label='$y = %ix$' % i)
   ....:     

In [58]: leg = ax.legend(loc='best')

In [59]: for l in leg.legendHandles:            
   ....:     l.set_linewidth(10)
   ....:     

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