This assumes, I think, that "b" occurs only
as singletons, true of the example Kelly
gave but otherwise not explicit.
Nick
[email protected]
austin nichols
> gen long index=1+sum(var1[_n-1]=="b")
>
> On 8/26/05, kelly johnson <[email protected]> wrote:
> > I want to creat a unique number to identify each set from a-b. e.g.:
> > var1 var2
> > a 1
> > a 1
> > b 1
> > a 2
> > a 2
> > b 2
> > a3
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