Thanks Nick and Michael for help! Michael's code did just the trick!
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Michael Blasnik
Sent: 06 October 2006 13:56
To: [email protected]
Subject: st: Re: RE: Issue with rounding
...
I think they want to know when a variable becomes constant for the remaining
observations within a group, even if it is not constant for the whole group.
If that is correct, then they might try:
gsort id -date
by id: gen sameaslast=sum(var==var[1])==_n
Which should flag observations which are the same as all of the remaining
observations within a given id.
Michael Blasnik
----- Original Message -----
From: "Nick Cox" <[email protected]>
To: <[email protected]>
Sent: Friday, October 06, 2006 7:42 AM
Subject: st: RE: Issue with rounding
> The way to solve these problems is to avoid them.
> Your problem is to check something, not to
> calculate something.
>
> The most direct way to see whether values of
> -some- variable remain constant in groups of
> -block- is
>
> bysort block (some) : assert some[1] == some[_N]
>
> If there is any difference between values, this
> will show up as a difference between the first (smallest)
> and the last (largest). Conversely, if all values are
> the same, the first and last will also be the same.
>
> Nick
> [email protected]
>
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