How to display all x labels in R barplot?

Question

This is a basic question but I am unable to find an answer. I am generating about 9 barplots within one panel and each barplot has about 12 bars. I am providing all the 12 l

Answer 1

To get rotated labels on a base R barplot, you could (like I do here) adapt one of the examples given in the vignette of the gridBase package:

library(grid)
library(gridBase)

## Make some data with names long enough that barplot won't print them all
DD <- table(rpois(100, lambda=5))
names(DD) <- paste("long", names(DD), sep="_")

## Plot, but suppress the labels
midpts <- barplot(DD, col=rainbow(20), names.arg="")

## Use grid to add the labels    
vps <- baseViewports()
pushViewport(vps$inner, vps$figure, vps$plot)

grid.text(names(DD),
    x = unit(midpts, "native"), y=unit(-1, "lines"),
    just="right", rot=50)

popViewport(3)