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(4892,6792,6290,5557,6105,4134,5590,7895,5947,5270,4864,5184,6093,7245,7041,6468,7210,4975,6699,6598,6426,6071,4913,5525,6403,6785,7481,7616,7825,5549,7257,8149,7837,7328,5973,6623,7007,8296,7358,8028,7609,5133,7308,7495,7597,7154,5543,6089,6572,6935,7269,7686,6994,5112,6576,6987,7035,6271,5082,4803)
> x <- c(5014,6153,6441,5584,6427,6062,5589,6216,5809,4989,6706,7174,6122,8075,6292,6337,8576,6077,5931,6288,7167,6054,6468,6401,6927,7914,7728,8699,8522,6481,7502,7778,7424,6941,8574,9169,7701,9035,7158,8195,8124,7073,7017,7390,7776,6197,6889,7087,6485,7654,6501,6313,7826,6589,6729,5684,8105,6391,5901,6758)
> par5 = 'werkelijk begonnen woningen + gebouwen'
> par4 = 'bouwvergunningen'
> 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/1hqx01224441543.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/1hqx01224441543.ps tmp/1hqx01224441543.png")
> 
> 
> proc.time()
   user  system elapsed 
  0.923   0.163   0.987