R version 2.6.2 (2008-02-08)
Copyright (C) 2008 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> y <- c(452.3,359.8,771,411.2,431.8,411.2,791.6,462.6,82.4,462.6,822.4,565.4,555.1,411.2,719.6,719.6,668.2,514,411.2,873.8,565.4,359.8,411.2,483,750.4,801.8,514,514,565.4,637.4,565.4,452.3,699,616.8,822.4,411.2,514,771)
> x <- c(668.2,514,1033,431.8,616.8,514,1028,668.2,1028,616.8,1033,616.8,668.2,668.2,976.6,822.4,1033,616.8,565.4,1028,668.2,668.2,565.4,688.8,1028,952.2,616.8,616.8,719.6,822.4,719.6,637.4,822.4,771.1,1033,514,616.8,1028)
> par5 = 'Prosome Length'
> par4 = 'Total Length'
> par3 = 'TRUE'
> par2 = 'grey'
> par1 = 'grey'
> ylab = ''
> main = 'Back to Back Histogram'
> 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/1n6cx1210573674.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/1n6cx1210573674.ps tmp/1n6cx1210573674.png")
> 
> 
> proc.time()
   user  system elapsed 
  0.933   0.157   1.230