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Re: st: BASIC QUESTION - counts of counts
From
Fernando Rios Avila <[email protected]>
To
[email protected]
Subject
Re: st: BASIC QUESTION - counts of counts
Date
Fri, 22 Jul 2011 15:10:05 -0400
Well, i would first drop the duplicate obsevations:
duplicates drop state county
and then use Dimitriy code.
On Fri, Jul 22, 2011 at 3:06 PM, Dimitriy V. Masterov
<[email protected]> wrote:
> Does this do what you want?
>
> collapse (count) county, by(state)
>
> DVM
> On Fri, Jul 22, 2011 at 2:59 PM, Ben Hoen <[email protected]> wrote:
>> Can someone help me to produce a table that counts the number of unique
>> occurrences of a group inside another group?
>>
>> For example assume I had the following table:
>>
>> Number State County
>> 1 NY Madison
>> 2 NY Madison
>> 3 PA Somerset
>> 4 NY Oneida
>> 5 PA Somerset
>> 6 PA Wayne
>> 7 PA Luzerne
>>
>> I want to produce a table like this:
>> State County
>> NY 2
>> PA 3
>>
>> Any ideas?
>>
>> Ben
>>
>> Ben Hoen
>> Principal Research Associate
>> Lawrence Berkeley National Laboratory
>> Office: 845-758-1896
>> Cell: 718-812-7589
>> [email protected]
>> http://eetd.lbl.gov/ea/emp/staff/hoen.html
>>
>>
>>
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>>
>
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