Re: [R] Error using lm(z~x+y,data)

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From: Peter Dalgaard BSA (p.dalgaard@biostat.ku.dk)
Date: Thu 21 Jun 2001 - 00:04:03 EST 

Message-ID: <x2u21bfdt8.fsf@blueberry.kubism.ku.dk>

tomsv193@student.liu.se writes:

> Hi!
>
> I am fitting a plane to a surface:
>
> This works excellent:
> ---------------------------------
> x<-dataframe[,1]
> y<-dataframe[,2]
> z<-dataframe[,3]
> data<-cbind(x,y,z)
>
> # Fit plane to surface
> result<-lm(z~x+y,data)
> ---------------------------------
>
> But I need to rescale the x,y parameters. So:
> -----------------------------
> x<-dataframe[,1]*149
> y<-dataframe[,2]*149
> z<-dataframe[,3]
> data<-cbind(x,y,z)
>
> # Fit plane to surface
> result<-lm(z~x+y,data)
> ----------------------------------
>
> And surprisingly this does not work. Error message is:
>
> Error in eval(attr(formula, "variables"), data, env) :
> sys.frame: not that many enclosing functions
>
> Why does this happen?

I can confirm this, but not understand it. Certainly looks like a bug. 

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907
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