更改图例库中的文本 r

Question

I want to change the text in the legend, I have not come around how to do that. For exampe change A and B to D and C. Any suggestions?

A <- c(10,5,5)
B <- c(30,10,10)

df <- cbind(A,B)

df <- t(df)

as.matrix(df)

barplot(df, beside=TRUE, legend=TRUE)

Answer 1

You simply supply a vector with the legend text (one for each color) to the argument legend.text :

barplot(as.matrix(df), beside = TRUE, legend.text = c("C", "D", "E"))

If you want to style the legend any further you need to put arguments inside a named list and pass it to the args.legend argument (look at ?legend ) for further arguments.

df <- data.frame(A = c(10,5,5),
                 B = c(30,10,10))

barplot(as.matrix(df), beside = TRUE, legend.text = c("C", "D", "E"), args.legend = list(x = "bottomright"))