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(882.5,789.6,773.3,804.3,817.8,836.7,721.8,760.8,841.4,1045.6,949.2,850.1,957.4,851.8,913.9,888,973.8,927.6,833,879.5,797.3,834.5,735.1,835,892.8,697.2,821.1,732.7,797.6,866.3,826.3,778.6,779.2,951,692.3,841.4,857.3,760.7,841.2,810.3,1007.4,931.3,931.2,855.8,858.4,925.9,930.7,1037.6,979.2,942.6,843.9,854.3,1029.8,944,856.4,1059.4,959.3,941.5,1026.4,921.3,968)
> x <- c(604.4,883.9,527.9,756.2,812.9,655.6,707.6,612.6,659.2,833.4,727.8,797.2,753,762,613.7,759.2,816.4,736.8,680.1,736.5,637.2,801.9,772.3,897.3,792.1,826.8,666.8,906.6,871.4,891,739.2,833.6,715.6,871.6,751.6,1005.5,681.2,837.3,674.7,806.3,860.2,689.8,691.6,682.6,800.1,1023.7,733.5,875.3,770.2,1005.7,982.3,742.9,974.2,822.3,773.2,750.9,708,690,652.8,620.7,461.9)
> par5 = 'Invoer VS'
> par4 = 'Uitvoer VS'
> par3 = 'TRUE'
> par2 = 'grey'
> par1 = 'grey'
> 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/freestat/rcomp/tmp/1022g1224543373.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/1022g1224543373.ps tmp/1022g1224543373.png")
> 
> 
> proc.time()
   user  system elapsed 
  1.205   0.217   1.247