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Re: st: obs no of max value


From   Nick Cox <n.j.cox@stata.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: obs no of max value
Date   Tue, 23 Sep 2008 08:39:03 -0500

Note that the final statement quoted below is quite false. The -generate- statement will record _n in every observation for which the -if- condition is satisfied.

A more detailed discussion of the underlying question is found in

SJ-6-4 dm0025 . . . . . . . . . . Stata tip 36: Which observations? Erratum
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox
Q4/06 SJ 6(4):596 (no commands)
correction of example code for Stata tip 36

SJ-6-3 dm0025 . . . . . . . . . . . . . . Stata tip 36: Which observations?
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox
Q3/06 SJ 6(3):430--432 (no commands)
tip for identifying which observations satisfy some
specified condition

Nick
n.j.cox@durham.ac.uk

Ashim Kapoor wrote:


Suppose I have a variable " Age". I wish to find out at which
observation does age have a max at. One way to do this is to write a
while loop. I think that's horrid.

I guess I could do : -

egen mAge=max(Age)

gen index=_n if Age==mAge

But this puts the right value of _n only in ONE observation.
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