Kelly,
gen obsno = _n
- Bob Yaffee
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----- Original Message -----
From: kelly johnson <[email protected]>
Date: Sunday, May 8, 2005 9:46 pm
Subject: st: Generate variable
> Hi,
>
> A few quick questions:
>
> (1) How do I generate a new variable in a dataset that is equal to
> the
> observations number? eg. suppose have data like:
>
> var1 var2
> 12 43
> 12 23
> . .
> . .
> 1 32
>
> how do I create a new variable, t, that is 1 for the first
> observation, 2
> for teh second, 3 for the third, etc.?
>
> (2) I am using the stata -rolling- command (new to stata 9) to
> generate
> rolling correlations. if i declare my data set to be a time sereis
> dataset
> using the date variabe (format: %dD_m_Y) it doesn't work. however,
> when i
> use a new variable for observations (eg. like the one above, where
> it equals
> 1 for the first obs, 2 for the second observation, ...) and declare
> the data
> to be time series (tsset) on this variabel, it works. Why?
>
> (3) also, can you refere me to a good site where i can get more
> information
> on writing loops?
>
> Thank you!
>
> Kelly
>
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