如何在Matlab中为绘图的特定x值设置背景颜色? [英] How to set background color for specific x-values of plot in Matlab?

问题描述

例如见下文.

我想用红色标记另一个独立时间序列大于0的年份.

I'd like to color-code (in red) the years for which another independent timeseries is greater than 0.

推荐答案

您可以使用

You can use the patch() function to draw sqares wherever you want, and give it the color in RGBA format, using an A (alpha) of around 0.5 for example

让我们举例说明:

x=1:0.1:10;
y=sin(x*2*pi);

box1=[1 1 2 2];
box2=[4 4 5 5];
boxy=[-1 1 1 -1]*max(y)*1.2;

plot(x,y)
patch(box1,boxy,[0 1 0],'FaceAlpha',0.2)
patch(box2,boxy,[1 0 0],'FaceAlpha',0.2)

ylim(1.1*[min(y) max(y)])

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