Thanks Berend, you are right. The break command would not work here. But
the while loop is taking time to generate the desired.

On Thu, Apr 26, 2012 at 2:39 PM, Berend Hasselman <bhh@xs4all.nl> wrote:

>
> On 26-04-2012, at 21:30, cassie jones wrote:
>
> > Hello R-users,
> >
> > I am having a problem with the 'break' command in R. I am wondering if
> > anyone can help me out with this. My program is similar to the following.
> >
> > a=rep(NA,5)
> > a[1]=0
> > for(i in 2:5)
> > {
> >    a[i]=a[i-1]+runif(1,0,3)
> >    if(a[i]>5)
> >    {
> >        i=2
> >        break
> >    }
> > }
> >
> > What exactly I am trying to do is find the sequence 'a' where the
> > individual values of 'a' would not be larger than 5. In any sequence, if
> it
> > becomes larger than 5, it would set the counter to be 2 and regenerate
> from
> > i=2. But I guess I have not put the break command in the right place, so
> > even though the 'if' condition becomes true and it sets i=2, it does not
> > regenerate the values of 'a' since the beginning. Any help is really
> > appreciated.
>
>
> break will exit the for loop. You cannot achieve what you desire with
> break.
>
> You need a while loop for this.
>
> i <- 2
> while( i <= 5 )
> # for(i in 2:5)
> {
>   a[i] <- a[i-1]+runif(1,0,3)
>   if(a[i]>5) i <- 2 else i <- i+1
> }
>
> And hope that the while loop will eventually terminate.
>
> Berend
>
>

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