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Re: st: string panelvar problem with xtset
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: string panelvar problem with xtset
Date
Fri, 8 Apr 2011 17:36:33 +0100
This is what -egen, group()- does, done more directly.
We can in fact boil it down
bysort string_id : gen num_id = _n == 1
replace num_id = sum(num_id)
Nick
On Fri, Apr 8, 2011 at 5:30 PM, Maarten buis <[email protected]> wrote:
> --- On Fri, 8/4/11, Dimitriy V. Masterov wrote:
>> I am having trouble xtsetting my data. My panel variable
>> is a concatenated 12 digit string block-group ID and a 4 digit
>> store id.
>> There are about 200,000 unique values.
>>
>> I cannot encode this variable because it has too many
>> values. Sencode might be an option, but it has been chugging
>> for some time.
>>
>> Any suggestions about how to solve this?
>
> sort string_id
> by string_id : gen first = _n == 1
> gen num_id = sum(first)
> drop first
>
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