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(60,57,56,56,59,57,62,62,59,57,63,61,59,58,58,58,55,55,56,60,56,59,59,63,60,58,57,58,55,57,56,53,61,65,66,65,68,78,79,80,84,84,86,86,81,80,79,76,78,69,70,59,55,47,48,47,45,36,44,33,34)
> x <- c(46,50,49,48,50,47,50,49,51,52,48,55,56,43,44,50,49,47,46,50,49,53,54,56,56,58,53,51,52,53,56,54,54,56,59,62,62,73,76,80,77,81,80,80,81,80,77,71,71,64,64,47,41,35,34,33,23,16,16,8,9)
> par5 = 'PrijsWa'
> par4 = 'PrijsVl'
> 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/1cz2w1258050101.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/1cz2w1258050101.ps tmp/1cz2w1258050101.png")
> 
> 
> proc.time()
   user  system elapsed 
  0.587   0.178   0.655