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Re: st: Counter Variable


From   Tirthankar Chakravarty <tirthankar.chakravarty@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Counter Variable
Date   Sat, 2 May 2009 14:50:57 +0100

Or this:
clear
input str15  Id    schlyr   new_prc
 A       1          1
 A       2          0
 A       3          0
 A       4          0
 A       5          0
 A       6          0
 A       7          0
 A       8          0
 A       9          0
 A      10          0
 A      11          0
 B       1          1
 B       2          0
 B       3          0
 B       4          0
 B       5          0
 B       6          0
 B       7          0
 B       8          0
 B       9          0
 B      10          1
 B      11          0
 end
 g newvar = 1 if new_prc==1
 bys Id (schlyr): replace newvar = newvar[_n-1]+1 if newvar !=1
 list, noobs

T

On Sat, May 2, 2009 at 2:12 PM, Eva Poen <eva.poen@gmail.com> wrote:
> <>
>
> bys id (sch) : gen princ = sum(new)
> bys id princ (sch) : gen tenure = _n
>
> Hope this helps,
> Eva
>
> 2009/5/1 Meryle Weinstein <meryle.weinstein@nyu.edu>
>>
>> I have a dataset that is set up as
>>
>>  Id    schlyr   new_pr~c
>>  A       1          1
>>  A       2          0
>>  A       3          0
>>  A       4          0
>>  A       5          0
>>  A       6          0
>>  A       7          0
>>  A       8          0
>>  A       9          0
>>  A      10          0
>>  A      11          0
>>  B       1          1
>>  B       2          0
>>  B       3          0
>>  B       4          0
>>  B       5          0
>>  B       6          0
>>  B       7          0
>>  B       8          0
>>  B       9          0
>>  B      10          1
>>  B      11          0
>> Etc.
>>
>> I want to create a new variable that is the number of years of principal
>> tenure at each school based on the schoolyear and newprinc.  The counter
>> should start again at 1 if new principal is 1 and go for the number of years
>> until the new principal.
>>
>> Can't figure out the correct syntax to do this.  Any help is appreciated.
>>
>>
>> Meryle Weinstein, Ph.D.
>> Assistant Director
>> Institute for Education & Social Policy
>> New York University
>> 82 Washington Square East, 7th floor
>> New York, NY 10003
>> (212) 9985817
>> (212) 9954564 (fax)
>> www.steinhardt.nyu.edu/iesp
>>
>>
>>
>>
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>
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>



-- 
To every ω-consistent recursive class κ of formulae there correspond
recursive class signs r, such that neither v Gen r nor Neg(v Gen r)
belongs to Flg(κ) (where v is the free variable of r).

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