在不同地区绘制不同颜色的背景

问题描述

我使用ggplot2软件包在R中制作一个简单的条形图。我不希望将背景分成五个区域，每个区域都有不同的（但同样低调的）颜色。我该怎么做？

I'm making a straightforward barchart in R using the ggplot2 package. Rather than the grey default I'd like to divide the background into five regions, each a different (but similarly understated) colour. How do I do this?

更具体地说，我希望五个颜色区域从0-25,25-45,45-65,65-85和85-100，其中颜色分别代表比青铜，青铜，银，金和铂更差的颜色。

More specifically, I'd like the five coloured regions to run from 0-25, 25-45, 45-65, 65-85 and 85-100 where the colours represent worse-than-bronze, bronze, silver, gold and platinum respectively. Suggestions for a colour scheme very welcome too.

推荐答案

下面是一个让你开始使用的例子：

Here's an example to get you started:

#Fake data
dat <- data.frame(x = 1:100, y = cumsum(rnorm(100)))
#Breaks for background rectangles
rects <- data.frame(xstart = seq(0,80,20), xend = seq(20,100,20), col = letters[1:5])


#As Baptiste points out, the order of the geom's matters, so putting your data as last will
#make sure that it is plotted "on top" of the background rectangles. Updated code, but
#did not update the JPEG...I think you'll get the point.

ggplot() +
  geom_rect(data = rects, aes(xmin = xstart, xmax = xend, ymin = -Inf, ymax = Inf, fill = col), alpha = 0.4) +
  geom_line(data = dat, aes(x,y))

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