python - fill_between 总是低于绘图线

Question

您好，我在 python 中使用 fill_between 命令，但 fill_between 似乎总是在线图下方。

看这个例子，alpha=1，所以不是不可见的。当它们位于 fill_between 位置时，不应看到所有线条。但我仍然看到它们。

iptyhon --pylab

plot([0,1],[1,1],'r')
plot([0,1],[2,2],'g')
plot([0,1],[0.5,0.5],'b')
plot([0,1],[3,3],'k')

fill_between([0,0.25],[0,3.5],facecolor='LightGreen')
fill_between([0.3,0.45],[0,3.5],facecolor='Salmon')
fill_between([0.5,0.7],[0,3.5],facecolor='LightBlue')
fill_between([0.75,0.95],[0,3.5],facecolor='LightYellow')

当我使用 alpha = 0.5 时，我仍然得到一些不正确的东西，正确的行为是每条线在与 fill_between 相同的位置时都会改变颜色，但你看到线的颜色没有改变...

plot([0,1],[1,1],'r')
plot([0,1],[2,2],'g')
plot([0,1],[0.5,0.5],'b')
plot([0,1],[3,3],'k')

fill_between([0,0.25],[0,3.5],facecolor='LightGreen',alpha=0.5)
fill_between([0.3,0.45],[0,3.5],facecolor='Salmon',alpha=0.5)
fill_between([0.5,0.7],[0,3.5],facecolor='LightBlue',alpha=0.5)
fill_between([0.75,0.95],[0,3.5],facecolor='LightYellow',alpha=0.5)

Answer 1

您可以使用 zorder kwarg 修复此问题:

plot([0,1],[1,1],'r',zorder=1)
plot([0,1],[2,2],'g',zorder=1)
plot([0,1],[0.5,0.5],'b',zorder=1)
plot([0,1],[3,3],'k',zorder=1)

fill_between([0,0.25],[0,3.5],facecolor='LightGreen',zorder=2)
fill_between([0.3,0.45],[0,3.5],facecolor='Salmon',zorder=2)
fill_between([0.5,0.7],[0,3.5],facecolor='LightBlue',zorder=2)
fill_between([0.75,0.95],[0,3.5],facecolor='LightYellow',zorder=2)