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(33,34,36,36,38,42,35,25,24,22,27,17,30,30,34,37,36,33,33,33,37,40,35,37,43,42,33,39,40,37,44,42,43,40,30,30,31,18,24,22,26,28,23,17,12,9,19,21,18,18,15,24,18,19,30,33,35,36,47,46,43)
> x <- c(24,23,24,24,27,28,25,19,19,19,20,16,22,21,25,29,28,25,26,24,28,28,28,28,32,31,22,29,31,29,32,32,31,29,28,28,29,22,26,24,27,27,23,21,19,17,19,21,13,8,5,10,6,6,8,11,12,13,19,19,18)
> par5 = 'economische situatie'
> par4 = 'indicator consumentenvertrouwen'
> par3 = 'TRUE'
> par2 = 'red'
> par1 = 'blue'
> 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/1ihgl1257951550.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/1ihgl1257951550.ps tmp/1ihgl1257951550.png")
> 
> 
> proc.time()
   user  system elapsed 
  0.625   0.189   0.697