[R] Histograms rotated, side-by-side

Ott Toomet siim at obs.ee
Mon May 13 11:18:07 CEST 2002

On Mon, 13 May 2002, Rachel Cunliffe wrote:

  |Hi there,
  |I am wanting to create 8 side-by-side histograms which have been rotated 90
  |degrees clockwise from how they usually sit.. all with the same scales.  Is
  |someone able to help me out?

I do not know any histogram function which can display horizontal histogram. 
You have to do a workaround using barplot(horis=TRUE).  E.g. define a
function like this:

horiz.hist <- function(x) {
  a <- hist(x, plot=FALSE)
  barplot(a$density, space=0, horiz=TRUE)
  width <- a$breaks[2] - a$breaks[1]
  axis(2, at=(pretty(a$breaks) - a$breaks[1])/width,

And now you can say

> par(mfrow=c(1,8))
> for(i in 1:8) horiz.hist(rnorm(100))

It works for me.  You may consider playing further to get equal scale for
all the histograms.



r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch

More information about the R-help mailing list