Pyplot:曲线下的垂直渐变填充? [英] Pyplot: vertical gradient fill under curve?

问题描述

我想知道是否有一种方法可以用垂直渐变填充pyplot曲线下的内容，例如此快速模型:

I'm wondering if there's a way to fill under a pyplot curve with a vertical gradient, like in this quick mockup:

我在StackOverflow上发现了这个黑手，如果我能弄清楚如何使颜色贴图垂直，我就不在乎多边形:

I found this hack on StackOverflow, and I don't mind the polygons if I could figure out how to make the color map vertical: How to fill rainbow color under a curve in Python matplotlib

推荐答案

也许有更好的方法，但这是可行的:

There may be a better way, but here goes:

from matplotlib import pyplot as plt

x = range(10)
y = range(10)
z = [[z] * 10 for z in range(10)]
num_bars = 100  # more bars = smoother gradient

plt.contourf(x, y, z, num_bars)

background_color = 'w'
plt.fill_between(x, y, y2=max(y), color=background_color)

plt.show()

显示:

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