Okay it worked, is there any way I can define the scale though?

thanks a lot!

On Sun, Oct 11, 2009 at 6:08 PM, Daniel Malter <daniel@umd.edu> wrote:

> x1=rnorm(100)
> x2=rnorm(100)
> e=rnorm(100)
> y=1.5*x1+x2+e
>
> plot(y~x1,pch=1,xlim=c(min(x1,x2),max(x1,x2)))
> points(y~x2,pch=16)
>
> HTH
> Daniel
>
>
> -------------------------
> cuncta stricte discussurus
> -------------------------
>
> -----Ursprüngliche Nachricht-----
> Von: r-help-bounces@r-project.org [mailto:r-help-bounces@r-project.org] Im
> Auftrag von Mehdi Khan
> Gesendet: Sunday, October 11, 2009 8:52 PM
> An: r-help@r-project.org
> Betreff: [R] add=TRUE function not working
>
> Hey everybody, I have a matrix with three columns.
>
> I want to plot two columns (independent variable) against one column (the
> defendant). This is my code and the error associated with it:
>
> plot(p, q, data=columns)
>
> > plot(pprime,q, add=TRUE)
> Warning messages:
> 1: In plot.window(...) : "add" is not a graphical parameter
> 2: In plot.xy(xy, type, ...) : "add" is not a graphical parameter
> 3: In axis(side = side, at = at, labels = labels, ...) :
>  "add" is not a graphical parameter
> 4: In axis(side = side, at = at, labels = labels, ...) :
>  "add" is not a graphical parameter
> 5: In box(...) : "add" is not a graphical parameter
> 6: In title(...) : "add" is not a graphical parameter
>
> How do I resolve this problem?
>
> thanks!
>
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