[R] an error about " return some vectors from some functions within a function"

[jim holtman]

Might be the case that the 'while' loop was not executed and therefore
'ck1' was not defined.  You might put a check to see if that was
happening.  Also you are incrementing 'count1' in the functions and it
is not being passed in as a parameter.  What are you expecting it to
do?  Is it defined in the global workspace?  The incrementing of
'count1' is local to the function.  Are you expecting it to count the
number of times things happen.  If so, you need to do:

count1 <<- count1 + 1

but be advised "<<-" is not for novices if you do not understand the
scoping rules of R.

On Thu, Feb 18, 2010 at 12:05 PM, Nai-Wei Chen <s90225007 at yahoo.com.tw> wrote:
> Dear all,
>
> When I try to return some vectors from some functions within a function, it indicate an error," Error in rbind(ck1, ck2, ck3) : object 'ck1' not found", in one of the iterations and stop.  Since I am not experienced in programming, can anyone give me a suggestion to inspect this error?
> The followings are the functions I created :
>
> ###################
> # functions in the convg #
> ###################
> check1 <- function(sumgt,beta1.0,gamma.0,sigma.0){
>    if (any(!is.finite(sumgt))){
>        count1 <- count1+1
>        return(c(count1,beta1.0,gamma.0,sigma.0))
>    }
>   else {return(c(NaN,NaN,NaN,NaN))}
>  }
> check2 <- function(v0,maxit,iter,beta1.0,gamma.0,sigma.0){
>     if (is.nan(sum(v0))==TRUE | any(!is.finite(v0)) | maxit == iter){
>        count1 <- count1+1
>        return(c(count1,beta1.0,gamma.0,sigma.0))
>    }
>    else {return(c(NaN,NaN,NaN,NaN))}
>  }
> check3 <- function(maxit,diff,error,beta1.0,gamma.0,sigma.0){
>     if (diff < error) {
>        return(c(count,beta1.0,gamma.0,sigma.0))
>    }
>    else {return(c(NaN,NaN,NaN,NaN))}
>  }
>
> convg <- function(count1,count,sub,rep,n,data1,beta1.0,gamma.0,sigma.0,v0,L,diff,error,iter,maxit){
>
>  while(diff > error && maxit < iter && max(abs(c(beta1.0,gamma.0,sigma.0))) < 10 && is.nan(sum(v0))==FALSE && any(is.finite(v0))){
>            :
>            :
>  ck1 <- check1(sumgt,beta1.0,gamma.0,sigma.0)
>            :
>            :
>  ck2 <- check2(v0,maxit,iter,beta1.0,gamma.0,sigma.0)
>            :
>            :
>  ck3 <- check3(maxit,diff,error,beta1.0,gamma.0,sigma.0)
>
> }
> return(rbind(ck1,ck2,ck3))
> }
>
> Thank you so much
>
>
> Sincerely,
>
>
> Joe
>
>
>
>        [[alternative HTML version deleted]]
>
>
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>
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?