Since he didn't actually state how x is defined (I almost hit the delete
because of this omission), but did give examples sorting on id bsid, I
assumed that his example had a small error in that 2 11 should be before 2
43. If he really wants the ordering of id bsid unchanged in its currently
unsorted way , then this should work:
bysort id: gen myorder=_n
bysort id (myorder): gen x=sum(bsid!=bsid[_n-1])
Michael
----- Original Message -----
From: "Nick Cox" <[email protected]>
To: <[email protected]>
Sent: Monday, January 29, 2007 6:55 AM
Subject: st: RE: Re: How Can I Create the Variable x?
> That doesn't match Raphael's example, as
>
> 2 43
>
> and
>
> 2 11
>
> would be categorised differently. The question
> is thus whether he minds.
>
> Nick
> [email protected]
>
> Michael Blasnik
>
>> I think this does what you want:
>>
>> bysort id (bsid): gen x=sum(bsid!=bsid[_n-1])
>
> Raphael Fraser
>
>> >I need help in creating the var x.
>> >
>> > id bsid x
>> > 1 22 1
>> > 1 22 1
>> > 1 52 2
>> > 1 87 3
>> > 2 43 1
>> > 2 43 1
>> > 2 11 2
>> > 3 28 1
>> > 4 33 1
>> >
>> > I have tried,
>> > bysort id bsid: gen x = _n
>> > bysort id (bsid): gen x = _n
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