setting colors for individual bars

Question

I'm having trouble setting the colors of my bar graph. Here is the code I am using. When the graph prints, all the bars default to gray.

a<- c("a", "b", "c", "d", "e")
b<- rnorm(5)
A<-data.frame(a,b)
group.colors <- c(a= "blue", 
                  b= "orange", 
                  c= "blue",
                  d = "orange", 
                  e = "orange")
A%>%ggplot(aes(a)) +
  geom_bar() +
  scale_fill_manual(group.colors)

Please make your example [reproducible](http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example). — Thomas K, Jun 26 '17 at 19:28

score 1 · Answer 1 · answered Jun 26 '17 at 22:03

1

You need to map a variable to the fill aesthetic, otherwise changing scale_fill_manual has no effect since there is no no scale which could be filled:

ggplot(A, aes(a, fill = a)) +
  geom_bar() +
  scale_fill_manual(values = group.colors)

answered Jun 26 '17 at 22:03

Thomas K

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setting colors for individual bars

1 Answers1