R:改变堆积条形图的颜色 [英] R: changing color of stacked barplot

问题描述

library(ggplot2)
df2 <- data.frame(supp=rep(c("VC", "OJ"), each=3),
                dose=rep(c("D0.5", "D1", "D2"),2),
                len=c(6.8, 15, 33, 4.2, 10, 29.5))
head(df2)
ggplot(data=df2, aes(x=dose, y=len, fill=supp)) +
  geom_bar(stat="identity")

我有一个简单的堆叠式barplot，我想手动更改颜色.更具体地说，我想翻转用于fill = supp的颜色(即，用青绿色代替OJ).我试过在geom_bar中添加一个color = ...参数，但这只是勾勒出条形图而不是给它们上色.

I have a simple stacked barplot, and I would like to change the colors manually. More specifically, I would like to flip the colors used for fill = supp (i.e. teal for OJ instead). I've trid adding a color = ... parameter into geom_bar but that simply outlines the barplots instead of coloring them in.

推荐答案

ggplot(data=df2, aes(x=dose, y=len, fill=supp)) +
  geom_bar(stat="identity")+scale_fill_manual(values = c("Green","tomato"))

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