[R] Optimzing a nested function

[Mario Valle]

P.S.: It is bad taste to call a variable 'sum' because it is a R function.

Ciao!
                     mario

On 12-Apr-11 08:33, vioravis wrote:
> I am trying to optimize a nested function using nlminb. This throws out an
> error that y is missing. Can someone help me with the correct syntax?? Thank
> you.
>
> test1<- function(x,y)
> {
>    sum<- x + y
>    return(sum)
> }
>
> test2<- function(x,y)
> {
>    sum<- test1(x,y)
>    sumSq<- sum*sum
>    return(sumSq)
> }
>
> nlminb(start = c(1,1), test2,lower = c(0,0), upper = c(5,5))
>
>
>
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-- 
Ing. Mario Valle
Data Analysis and Visualization Group            | 
http://www.cscs.ch/~mvalle
Swiss National Supercomputing Centre (CSCS)      | Tel:  +41 (91) 610.82.60
v. Cantonale Galleria 2, 6928 Manno, Switzerland | Fax:  +41 (91) 610.82.82