[R] Histograms rotated, side-by-side

[Frank E Harrell Jr]

If you want them exactly back to back see the histbackback function in the Hmisc library.  -Frank Harrell

On Mon, 13 May 2002 11:18:07 +0200 (CEST)
Ott Toomet <siim at obs.ee> wrote:

> 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$breaks[1])/width,
>        labels=pretty(a$breaks))
> }
> 
> 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.
> 
> Cheers,
> 
> Ott
> 
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-- 
Frank E Harrell Jr              Prof. of Biostatistics & Statistics
Div. of Biostatistics & Epidem. Dept. of Health Evaluation Sciences
U. Virginia School of Medicine  http://hesweb1.med.virginia.edu/biostat
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