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(1.00,1.04,1.02,1.07,1.12,1.08,1.02,1.01,1.04,0.98,0.95,0.94,0.94,0.96,0.97,1.03,1.01,0.99,1.00,1.00,1.02,1.01,0.99,0.98,1.01,1.03,1.03,1.00,0.96,0.97,0.98,1.02,1.04,1.01,1.01,1.00,1.01,1.02,1.03,1.06,1.12,1.12,1.13,1.13,1.13,1.17,1.14,1.08,1.07,1.12,1.14,1.21,1.20,1.23,1.29,1.31,1.37,1.35,1.26,1.26)
> x <- c(0.33,0.33,0.32,0.33,0.34,0.36,0.34,0.33,0.35,0.31,0.28,0.26,0.26,0.26,0.29,0.30,0.30,0.28,0.29,0.29,0.32,0.33,0.29,0.31,0.33,0.36,0.39,0.30,0.27,0.28,0.29,0.30,0.30,0.30,0.31,0.30,0.31,0.29,0.32,0.33,0.35,0.35,0.36,0.40,0.40,0.47,0.43,0.38,0.38,0.40,0.45,0.47,0.45,0.50,0.54,0.55,0.59,0.51,0.50,0.50)
> par5 = 'Prijs per liter eurosuper 95'
> par4 = 'Prijs per liter gasolie'
> 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: Wessa P., (2007), Back to Back Histogram (v1.0.2) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_backtobackhist.wasp/
> #Source of accompanying publication: Office for Research, Development, and Education
> #Technical description: Write here your technical program description
> 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/1b8pr1224524495.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/1b8pr1224524495.ps tmp/1b8pr1224524495.png")
> 
> 
> proc.time()
   user  system elapsed 
  0.963   0.169   1.089