ggplot2 - 两条垂直线之间的阴影区域 [英] ggplot2 - shade area between two vertical lines

问题描述

我使用 ggplot2 来创建一些相当简单的散点图。我现在有两条简单的垂直线：

  ... + geom_vline（xintercept = 159684.186，linetype =dotted，size = 0.6）+ 
 geom_vline（xintercept = 159683.438，linetype =dotted，size = 0.6）+ ... 
  

任何人都可以告诉我如何遮蔽从Y轴顶部到X轴这两条线之间的区域吗？

解决方案

您可以使用 geom_rect 。

  ... + geom_rect（aes（xmin = 159683.438，xmax = 159684.186，ymin = 0，ymax = Inf））
  

x的两个值来自您的 geom_vline 调用。使用 ymin = 0 将其降为0; ymax = Inf 会一直走到轴的顶端。如果你希望它一直到X轴而不是0，你可以使用 ymin = -Inf 。

一些注释：

如果按照geoms的先后顺序，这样可以最好地将其绘制在其他部分的首位/下面（特别是散点图数据）。

您可以在 aes 之外设置填充颜色（ fill / code>调用一个固定值。我还会将透明度（ alpha ）设置为0.5之类的东西，以便它后面的东西（很可能是网格线，如果你把它作为第一个几何图形）仍然可以被看到。

I am using ggplot2 to create some fairly simple scatter plots. I currently have two simple vertical lines using:

... + geom_vline(xintercept=159684.186,linetype="dotted",size=0.6)+
geom_vline(xintercept=159683.438,linetype="dotted",size=0.6)+ ...

Can anyone tell me how to shade the area between these two lines from the top of the Y axis to the X axis?

解决方案

You can use geom_rect.

... + geom_rect(aes(xmin=159683.438, xmax=159684.186, ymin=0, ymax=Inf))

The two values for x come from your geom_vline calls. using ymin=0 takes it down to 0; ymax=Inf will take it all the way to the top of the axis. If you want it to go all the way down to the x axis rather than 0, you can use ymin=-Inf.

Some notes:

This works best if it is early in the order of geoms so that it gets drawn first/below the other parts (especially the scatterplot data).

You can set the fill color (fill aesthetic) outside the aes call to a fixed value. I would also set the transparency (alpha) to something like 0.5 so that the stuff behind it (grid lines, most likely, if you put it as the first geom) can still be seen.

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