# Re: [R] Functions within functions in R and S-Plus

From: Spencer Graves <spencer.graves_at_pdf.com>
Date: Wed 08 Jun 2005 - 03:15:59 EST

p.s. This modification gave the same answer for me in both S-Plus 6.2 and R 2.1.0 patched under Windows XP.

Spencer Graves wrote:

>
> mainfunc <- function(x){
>
> est <- function(x,par){
> abs(sum(par*x))
> }
>
> func <- function(par,x, est.=est){
> est.(x,par)
> }
>
> est.theta <- function(x, func.=func, est.=est){
> optimize(func.,lower=-10, upper=20,x=x,
> est.=est.)\$minimum
> }
>
> est.theta(x, func.=func, est.=est)
>
> }
>
> > x <- 1:10
> > mainfunc(x)
> [1] 5.286101e-006
>
> spencer graves
>
> Victor Gravenholt wrote:
>

```>> Sorry to bother you about a S-Plus related problem, but I hope someone
>> can help.
>> I have tried to "translate" some code from R to S-Plus (I have
>> colleague that insists on using S-Plus. And yes, I have tried to make
>> him change to R...)
>> The following code works out fine in R, but in S-Plus (S-PLUS 6.2 for
>> Windows Professional Ed.) I get the error message "Problem in
>> I have tried to keep most of the structure in my original problem (but
>> simplified it!), so the code could seem a bit strange.
>> I suspect that this has something to do with different scoping rules
>> in R and S-Plus, but still I have not found a workable solution in
>> S-Plus.
>>
>> mainfunc <- function(x){
>>
>> est <- function(x,par){
>> abs(sum(par*x))
>> }
>>
>> func <- function(par,x){
>>    est(x,par)
>> }
>>
>> est.theta <- function(x){
>>    optimize(func,lower=-10, upper=20,x=x)\$minimum
>>    }
>>
>> est.theta(x)
>>
>> }
>>
>> x <- 1:10
>> mainfunc(x)
>>
>>
>>
>>
>> Any help is greatly appreciated.
>>
>> Victor
>>
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