Re: st: Terminating a loop when a certain value is reached.

[Jeph Herrin <stata@spandrel.net>]

I still don't see an index on generationnum.

On 4/1/2013 10:03 AM, Stephen Cranney wrote:
> Apologies for the lack of detail. I forgot to add the `i'  but it
> still isn't working (it's running, it just isn't doing what I want it
> to, which is terminate the loop at a certain point). Below is the
> relevant portion of my code. As you can see, I have a large number so
> that it just keeps running indefinitely (which is why I want to be
> able to make a break point trigger). Once a "birth" is created a
> series of mirror observations is created for the offspring, and its
> generationnum value is one greater than its parent. What I'm trying to
> do is run this until generationnum equals a certain number (decided at
> the beginning of the ado file), but I don't see why the continue,
> break code at the end performs this function.
>
> forvalues i = 1/999999999999999999999999 {
>          if births[`i'] == 1 {
>          expand 2, gen(newvar`i')
>          egen Xnewvar= rowtotal (newvar*)
>          drop if Xnewvar>1
>          drop if Xnewvar== 0 & generationnum!= 1
>          drop Xnewvar
>          replace generationnum=generationnum[`i']+1 if newvar`i'==1
>           if generationnum==2 {
>          continue, break
>            }
> ....
>
> Thanks again,
>
> Stephen
>
>
>
> On Mon, Apr 1, 2013 at 8:30 AM, Nick Cox <njcoxstata@gmail.com> wrote:
> > Not much detail here.
> >
> > One possibility is that you are forgetting that
> >
> > if generationnum == 2
> >
> > can only mean
> >
> > if generationnum[1] == 2
> >
> > Nick
> >
> >
> > On 1 Apr 2013, at 13:03, Stephen Cranney <scranney@sas.upenn.edu> wrote:
> >
> > > Hi all, I'm trying to figure out how to break out of a loop once a
> > > variable is changed to a certain value. In each iteration, the value
> > > is modified according to the inputs within the loop. I've tried to use
> > > an "if" command:
> > >
> > > if generationnum==2 {
> > >         continue, break
> > >         }
> > >
> > > but it's still not terminating the loop. Does anybody know of a
> > > command to terminate a loop once a specified calculated number is
> > > reached?
> > *
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