[R] Functions within functions in R and S-Plus

[Spencer Graves]

How about the following:

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 
> est.theta(x): Object "func" not found ".
> 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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