R version 2.9.0 (2009-04-17)
Copyright (C) 2009 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> y <- c(18,16,19,18,23,20,20,15,17,16,15,10,13,10,19,21,17,16,17,14,18,17,14,15,16,11,15,13,17,16,9,17,15,12,12,12,12,4,7,4,3,3,0,5,3,4,3,10,4,1,1,8,5,4,0,2,7,6,9,10)
> x <- c(12.6,15.7,13.2,20.3,12.8,8,0.9,3.6,14.1,21.7,24.5,18.9,13.9,11,5.8,15.5,22.4,31.7,30.3,31.4,20.2,19.7,10.8,13.2,15.1,15.6,15.5,12.7,10.9,10,9.1,10.3,16.9,22,27.6,28.9,31,32.9,38.1,28.8,29,21.8,28.8,25.6,28.2,20.2,17.9,16.3,13.2,8.1,4.5,-0.1,0,2.3,2.8,2.9,0.1,3.5,8.6,13.8)
> par5 = 'Svg'
> par4 = 'Rvnp'
> par3 = 'TRUE'
> par2 = 'grey'
> par1 = 'grey'
> ylab = ''
> main = 'Back to Back Histogram'
> if (par3 == 'TRUE') par3 <- TRUE
> if (par3 == 'FALSE') par3 <- FALSE
> library(Hmisc)
Loading required package: survival
Loading required package: splines

Attaching package: 'Hmisc'


	The following object(s) are masked from package:survival :

	 untangle.specials 


	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/1m76v1261227146.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 
> try(system("convert tmp/1m76v1261227146.ps tmp/1m76v1261227146.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  0.601   0.159   0.674