R version 2.11.1 (2010-05-31)
Copyright (C) 2010 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> y <- c()
> x <- c(4.8,5.4,6,6,4,6,4.2,4.2,4.2,4,4.6,5.666666667,3.8,4.8,4.2,4,5.4,4.6,4,4.4,5,5.4,5.2,4.4,4,3.4,4.4,4,4.4,4.4,4,4.8,4,4,5,4,3.4,4,5.4,4.2,4,5.6,4.8,4.4,4.6,4,5.2,4.8,4.6,4,4.2,4.6,4.4,5,5,4,3.8,5.2,4.2,4.4,4.2,6,4.8,4,4.4,4,4.8,4.8,5.6,6,4,4.2,5,4.4,4.2,4.6,4.4,4,4,4,4.2,4,5,4.2,5.4,4,6,3.8,5,4.4,5,4.4,5,4.2,4.6,5)
> par2 = 'less'
> par1 = 'pearson'
> ylab = 'specmemmean'
> xlab = 'compmemomean'
> #'GNU S' R Code compiled by R2WASP v. 1.0.44 ()
> #Author: Dr. Ian E. Holliday
> #To cite this work: Ian E. Holliday, 2009, YOUR SOFTWARE TITLE (vNUMBER) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_YOURPAGE.wasp/
> #Source of accompanying publication: 
> #Technical description: 
> postscript(file="/var/www/rcomp/tmp/1g0aa1288543943.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(x,y, xlab=xlab, ylab=ylab)
> abline(coef=(lm(y ~ x))$coeff, col='red')
Error in model.frame.default(formula = y ~ x, drop.unused.levels = TRUE) : 
  invalid type (NULL) for variable 'y'
Calls: abline ... lm -> eval -> eval -> model.frame -> model.frame.default
Execution halted