python - 使用中间颜色绘图

Question

我见过很多关于着色图、调色板、颜色图等的问题。我只想在默认的 w、m、g、k、b、r 之间有中间颜色。

例如，我希望下面的图是灰色而不是黑色。

import numpy as np
import matplotlib.pylab as plt

a = np.linspace(1., 4., 6)
b = np.array([3,4.,5.3,7.,8,0])

plt.figure()
plt.plot(a,b,'ko-',)
plt.show()

Answer 1

您可以使用matplotlib以多种方式定义颜色。来自 plt.plot 的文档:

In addition [to the abbreviations that you listed above], you can specify colors in many weird and wonderful ways, including full names ('green'), hex strings ('#008000'), RGB or RGBA tuples ((0,1,0,1)) or grayscale intensities as a string ('0.8'). Of these, the string specifications can be used in place of a fmt group, but the tuple forms can be used only as kwargs.

所以，一些在你的图中变灰的例子:

plt.plot(a,b,'o-',color='grey')

plt.plot(a,b,'o-',color='#808080')

plt.plot(a,b,'o-',color=(0.5,0.5,0.5)

plt.plot(a,b,'o-',color='0.5')