[R] style question: returning multiple arguments - structure orlist

[Peter Dalgaard BSA]

Thomas Lumley <tlumley at u.washington.edu> writes:

> I think you'll find that the first argument of an assignment function has
> to exist already -- the function is passed the evaluated first argument.
> 
> This means it isn't quite true that
>   a<-"foo<-"(a,value)
> is the same as
>   foo(a)<-value
> 
> eg
> > "foo<-"<-function(x,value){list(substitute(x),value)}
> > foo(a)<-4
> Error: Object "a" not found
> > "foo<-"(a,1)
> [[1]]
> a
> 
> [[2]]
> [1] 1
> > a<-1
> > foo(a)<-4
> > a
> [[1]]
> *tmp*
> 
> [[2]]
> [1] 4
> 
> 
> If this is correct, then you can't really write "list<-"

Dang! You're right...

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