[R] writing simple function through script

[Gabor Grothendieck]

Its looking in environment(LgmFormula) for Xdata in order to evaluate
Xdata$Qe in the weights argument so just specify weights = Qe.

Alternately insert the following as the beginning of yo.
It creates a new local LgmFormula but with its environment set
to the current environment:

   environment(LgmFormula) <- environment()

See the Environment section of ?formula


On Wed, Sep 10, 2008 at 9:22 AM, Benoit Boulinguiez
<benoit.boulinguiez at ensc-rennes.fr> wrote:
> Hi all,
>
> I try to write a simple function in a script. The script is as follows
>
> yo<-function(Xdata)
> {
> n<-length(Xdata[,1])
>
> Lgm<-nls(formula=LgmFormula,
>  data=Xdata,
>  start=list(a=1500,b=0.1),weights=Xdata$Qe)
> return(Lgm)
> }
>
> After the execution of the script, when I call the function yo on data
> called NC60.DATA I get an error.
>
> #yo(NC60.DATA)
> Erreur dans eval(expr, envir, enclos) : objet "Xdata" not found
>
>
> The object Xdata isn't found. Why?
> Is that possible to debug a function with R?
>
> Regards/Cordialement
>
> -------------
> Benoit Boulinguiez
> Ph.D
> Ecole de Chimie de Rennes (ENSCR) Bureau 1.20
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>
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