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Re: st: copying data form _n
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: copying data form _n
Date
Wed, 27 Apr 2011 09:58:37 +0100
The precise answer depends on what else is true but
1.
bysort whatever (flag) : replace y = y[1] if _n == 2 & flag == 2 &
missing(y) & flag == 1
or
2.
egen replacement_value = mean(y / flag == 1) , by(whatever)
bysort whatever : replace y = replacement_value if flag == 2 & missing(y)
should give you some flavour.
See also FAQ
FAQ . . . . . . . . . . . . . . . . . . . . . . . Replacing missing values
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox
2/03 How can I replace missing values with previous or
following nonmissing values?
http://www.stata.com/support/faqs/data/missing.html
Nick
On Wed, Apr 27, 2011 at 9:26 AM, Daniel Marcelino <[email protected]> wrote:
>
> I need to replace values of variables from observation flagged==1 to
> observation flagged==2 if the last has missing values.
>
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