R version 2.9.0 (2009-04-17)
Copyright (C) 2009 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> y <- c(22,22,20,21,20,21,21,21,19,21,21,22,19,24,22,22,22,24,22,23,24,21,20,22,23,23,22,20,21,21,20,20,17,18,19,19,20,21,20,21,19,22,20,18,16,17,18,19,18,20,21,18,19,19,19,21,19,19,17,16,16,17,16,15,16,16,16,18,19,16,16,16)
> x <- c(31,26,18,26,26,27,22,24,31,23,31,37,42,43,48,46,45,52,46,53,47,43,44,48,48,51,57,50,38,31,31,37,26,36,41,44,50,49,48,50,52,53,59,53,59,61,62,54,62,63,63,71,65,65,61,59,53,55,39,36,29,31,30,23,19,14,3,6,13,3,6,0)
> par5 = 'econ. situatie van de gezinnen'
> par4 = 'algemene economische situatie'
> par3 = 'TRUE'
> par2 = 'blue'
> par1 = 'red'
> ylab = ''
> main = 'Back to Back Histogram'
> #'GNU S' R Code compiled by R2WASP v. 1.0.44 ()
> #Author: Prof. Dr. P. Wessa
> #To cite this work: AUTHOR(S), (YEAR), YOUR SOFTWARE TITLE (vNUMBER) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_YOURPAGE.wasp/
> #Source of accompanying publication: Office for Research, Development, and Education
> #Technical description: Write here your technical program description (don't use hard returns!)
> if (par3 == 'TRUE') par3 <- TRUE
> if (par3 == 'FALSE') par3 <- FALSE
> library(Hmisc)
Loading required package: survival
Loading required package: splines

Attaching package: 'Hmisc'


	The following object(s) are masked from package:survival :

	 untangle.specials 


	The following object(s) are masked from package:base :

	 format.pval,
	 round.POSIXt,
	 trunc.POSIXt,
	 units 

> z <- data.frame(cbind(x,y))
> names(z) <- list(par4,par5)
> postscript(file="/var/www/html/rcomp/tmp/156w01257937192.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> out <- histbackback(z, probability=par3, main = main, ylab = ylab)
> barplot(-out$left, col=par1, horiz=TRUE, space=0, add=TRUE, axes=FALSE)
> barplot(out$right, col=par2, horiz=TRUE, space=0, add=TRUE, axes=FALSE)
> dev.off()
null device 
          1 
> 
> system("convert tmp/156w01257937192.ps tmp/156w01257937192.png")
> 
> 
> proc.time()
   user  system elapsed 
  0.604   0.180   0.677