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Re: st: forvalues and _N

From   "Martin Weiss" <[email protected]>
To   <[email protected]>
Subject   Re: st: forvalues and _N
Date   Fri, 10 Oct 2008 19:56:57 +0200

see -help _variables-. The equal sign evaluates this -expression- so no need for any -macro-...

----- Original Message ----- From: "Michael I. Lichter" <[email protected]>
To: <[email protected]>
Sent: Friday, October 10, 2008 7:30 PM
Subject: Re: st: forvalues and _N

Whoa! This works even though `=_N' is clearly not a macro. Is this an undocumented feature, or is it a "real" part of Stata that will stick around? I'm sorry if this is discussed somewhere in the FAQ -- I have no idea how to search for it.


Philip Ryan wrote:

forvalues i = 1/`=_N'  {




At 06:01 PM 10/10/2008, you wrote:
Hi Stata users,

I have been searching for a special command in regard to *forvalues*, but without success.

I need something like:

gen N=_N

forvalues i = 1/N {

In my case, N is the maximum number of observations in my sample. I do not want to write 22345 or something instead of N because the number of observations might vary depending on how many observations I have dropped before.

But it is not possible to use N in a loop command at this place.

Are you aware of any stata updates being a solution to that problem?

Do you know a way to program it any better?


Bastian M Steingros

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