adjusting x-axis in R histograms

Question

This histogram is really ugly:

hist(rbinom(10000, 20000, 0.0001),freq=F,right=F)

I don't want spaces between my bars. I tried different breaks= methods but they all produce similar results. Any ideas?

I also want each bin value (or mean values )to be printed under the center of it's bar.

Answer 1

这是一种使标签居中的方法:

x <- rbinom(1000, 2000, 0.001)
tmp <- hist(x, breaks=0:(max(x)+1), xaxt="n", right=FALSE, freq=FALSE)
axis(1, at=tmp$mids, labels=0:max(x))