geom_bar用不同的填充颜色定义边框颜色 [英] geom_bar define border color with different fill colors

问题描述

我想用geom_bar绘制条形图，我想要用黑色边框包围的独特填充颜色.但是，指令color="black"并没有被解释为黑色"，而是出现了红色边框.

I want to draw a bar plot with geom_bar where I want unique fill colors surrounded by a black border. However the instruction color="black" is not interpreted as "black" as I want it to be and I get red borders.

library(ggplot2)
test=as.data.frame(cbind(a=c(1,1,2,3), b=1:4, c=as.character(1:4)))
ggplot(test) + geom_bar(aes(x=a, y=b, fill=c, colour="black"), stat="identity")

如何正确使用geom_bar，以便为我提供正确的黑色边框?

How do I correctly use geom_bar so that it gives me the correct black border?

推荐答案

您必须将colour放在aes之外:

ggplot(test) + geom_bar(aes(x=a, y=b, fill=c), colour="black", stat="identity")

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