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RE: st: syntax behaving differently


From   tashi lama <ltashi32@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: syntax behaving differently
Date   Tue, 7 Aug 2012 18:44:26 +0000

awesome. Thanx. I am starting to learn to write ado files and also mata. Until now, I have been writing mostly do-files. 
----------------------------------------
> Date: Tue, 7 Aug 2012 19:30:22 +0100
> Subject: Re: st: syntax behaving differently
> From: njcoxstata@gmail.com
> To: statalist@hsphsun2.harvard.edu
>
> 1. -marksample- marks out string variables unless you specify
> otherwise. This is prominently documented.
>
> 2. #1 bites here too. With no varlist specified, your program implies
> that everything is the varlist, and thus that observations are marked
> out if any variable is a string variable, which is true in your case.
> So nothing is listed.
>
> 3. That's what you asked for. Again, this is what -marksample- does on
> your behalf.
>
> It is hard to see what you are trying to do with this program, except
> perhaps learn programming. It does no more, and in fact it does less,
> than -list- can do.
>
> Nick
>
> On Tue, Aug 7, 2012 at 7:15 PM, tashi lama <ltashi32@hotmail.com> wrote:
> >
> > I have a dataset
> > var1 var2 var3 |
> > |-----------------------|
> > | Tom 1 5 |
> > | Jane 2 6 |
> > | Suzanne . 7 |
> > | Henry 4 8 |
> > | Mike 9 9 |
> > and my ado file is following
> > program tt1
> > syntax [varlist] [if] [in]
> > marksample touse
> > list `varlist' if `touse'
> > end
> > exit
> > 1. when I say tt1 var1, it doesn't list anything. Is it because var1 is string?Even it is, I haven't limited by varlist to not be string. Any clue/
> > 2. when I say tt1, it doesn't list anything. Is it not supposed to list var1var2 and var3 since I have enclosed varlist with [] stating varlist to be optional. Any clue?
> > 3. when I say tt1 var2, it lists var2 but ignores missing obs. Is there anoption to include both missing and nonmissing?
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