R: changing color of stacked barplot

Question

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")

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.

You want to add `+ scale_fill_manual(values = c("green", "violet"))` to the end of your code as shown to add your own colors (notice this is **FILL**, not **COLOR**). However, to keep those fill colors and just flip them, use `+ scale_fill_hue(direction = -1)`. — Brian, May 01 '17 at 15:39

score 14 · Accepted Answer · answered Nov 08 '18 at 10:12

14

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

answered Nov 08 '18 at 10:12

sai saran

737
9
32

I have multiple stacks and I want to change colors too but not manually. Is it possible? – classy_BLINK Jan 10 '22 at 14:59
yes it is possible, you can choose color platelet. – sai saran Jul 29 '22 at 10:13

R: changing color of stacked barplot

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