R version 2.7.2 (2008-08-25)
Copyright (C) 2008 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> y <- c(1.2,1.2,1.4,1.5,1.4,1.8,2,2.3,2.6,2.3,2.5,2.3,2.1,2.2,2.2,2.7,3.1,3.2,3.1,3.1,2.8,3,2.8,2.7,3.2,3.1,3,2,1.7,1.2,1.4,1.3,1.3,1.1,0.9,1.2,0.9,1.3,1.4,1.5,1.1,1.6,1.5,1.6,1.7,1.6,1.7,1.6,1.6,1.3,1.1,1.6,1.9,1.6,1.7,1.6,1.4,2.1,1.9,1.7,1.8,2,2.5,2.1,2.1,2.3,2.4,2.4,2.3,1.7,2,2.3)
> x <- c(3.42,3.42,3.43,3.47,3.51,3.52,3.52,3.52,3.52,3.52,3.52,3.52,3.52,3.52,3.58,3.6,3.61,3.61,3.61,3.63,3.68,3.69,3.69,3.69,3.69,3.69,3.69,3.69,3.69,3.78,3.79,3.79,3.8,3.8,3.8,3.8,3.81,3.95,3.99,4,4.06,4.16,4.19,4.2,4.2,4.2,4.2,4.2,4.23,4.38,4.43,4.44,4.44,4.44,4.44,4.44,4.45,4.45,4.45,4.45,4.45,4.45,4.45,4.45,4.46,4.46,4.46,4.48,4.58,4.67,4.68,4.68)
> par5 = 'Gezondheidsindex'
> par4 = 'Sigaretten'
> 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)

Attaching package: 'Hmisc'


	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/1z7bo1224500218.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/1z7bo1224500218.ps tmp/1z7bo1224500218.png")
> 
> 
> proc.time()
   user  system elapsed 
  0.940   0.172   1.026