R version 2.8.0 (2008-10-20)
Copyright (C) 2008 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> y <- c(171.4,192,231.2,250.8,268.4,266.9,268.5,268.2,265.3,253.8,243.4,213.6,221,227.3,221.6,222.1,232.2,229.6,238.9,238.2,223.9,215,211.1,210.6,206.6,207,201.7,204.5,204.5,195.1,205.5,187.5,173.5,172.3,167.5,157.5,151.1,148.5,147.9,145.6,139.8,138.9,141.4,148.7,150.9,147.3,144.5,134,135.1,131.4,128.4,127.6,127.4,124,123.5,128,129.9,127.6,121.8,114.1,111.4)
> x <- c(191,239.4,321.9,362.7,413.6,407.1,383.2,347.7,333.8,312.3,295.4,283.3,287.6,265.7,250.2,234.7,244,231.2,223.8,223.5,210.5,201.6,190.7,207.5,198.8,196.6,204.2,227.4,229.7,217.9,221.4,216.3,197,193.8,196.8,180.5,174.8,181.6,190,190.6,179,174.1,161.1,168.6,169.4,152.2,148.3,137.7,145,153.4,141.7,142.7,135.9,131.8,134.6,127.5,126.5,118.7,117.1,110.7,107.1)
> par5 = 'Industriële grondstoffen'
> par4 = 'Grondstoffen'
> 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/rcomp/tmp/102ly1229857080.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/102ly1229857080.ps tmp/102ly1229857080.png")
> 
> 
> proc.time()
   user  system elapsed 
  0.757   0.166   0.904