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(2.1,2.8,2.6,2.4,2.5,2.7,3.2,2.8,2.8,3.0,3.1,3.1,3.0,2.4,2.7,3.0,2.7,2.7,2.0,2.4,2.6,2.4,2.3,2.4,2.5,2.6,2.6,2.6,2.7,2.8,2.6,2.6,2.0,2.0,2.1,1.9,2.0,2.5,2.9,3.3,3.5,3.5,4.6,4.4,5.3,5.8,5.9,5.6,5.8,5.5,4.6,4.2,4.0,3.5,2.3,2.2,1.4,0.6,0.0,0.5)
> x <- c(1.3,1.3,1.2,1.1,1.4,1.2,1.5,1.1,1.3,1.5,1.1,1.4,1.3,1.5,1.6,1.7,1.1,1.6,1.3,1.7,1.6,1.7,1.9,1.8,1.9,1.6,1.5,1.6,1.6,1.7,2.0,2.0,1.9,1.7,1.8,1.9,1.7,2.0,2.1,2.4,2.5,2.5,2.6,2.2,2.5,2.8,2.8,2.9,3.0,3.1,2.9,2.7,2.2,2.5,2.3,2.6,2.3,2.2,1.8,1.8)
> par5 = 'gi'
> par4 = 'it'
> par3 = 'TRUE'
> par2 = 'blue'
> par1 = 'red'
> 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/1p8jf1257769204.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/1p8jf1257769204.ps tmp/1p8jf1257769204.png")
> 
> 
> proc.time()
   user  system elapsed 
  0.961   0.210   1.028