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RE: st: weight option after syntax


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: weight option after syntax
Date   Mon, 26 Sep 2005 10:29:44 +0100

Otherwise put, the implication of 

namelist 

is that a namelist is required. You 
evidently regard it as optional, 
which would be specified by 

[namelist] 

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

Scott Merryman
 
> I suspect the problem is that "namelist" requires that the 
> names listed use
> the standard naming convention and names cannot begin with 
> "["  If you use
> the "if" option then parser knows that what follows cannot be part of
> "namelist"
> 
> 
> One alternative is to use "anylist"
> 
> program mycmd, rclass byable(recall)
> version 9.1
> syntax anything  [if] [in] [pweight]
> 	gettoken subcmd anything: anything
> 	gettoken lhs anything: anything
>  	loc rhs `anything'
> 	di in r "`subcmd'"
> 	di in r "`lhs'"
> 	di in r "`rhs'"
> 	di in r "`weight'"
> 	di in r "`exp'"
> end
> 
> Which now works:
> 
> 
> . mycmd fubar price mpg  weight [anyhoo = (American) anyhow]  
> [pw = fore]
> fubar
> price
> mpg  weight [anyhoo = (American) anyhow]
> pweight
> = fore

Jun Xu
 
 > Sorry that I forgot to mention that I am using Stata 9.1.

> > >I think I must miss something important here. I am trying 
> to write a
> > >command that simply invokes a stata command repeatedly and 
> collect some
> > >eret information. The following is the very beginning part 
> of it (also
> > >where the problem lies), and I am having problems with the 
> [pw] option. I
> > >inserted display commands to check if I am getting macro's 
> that I want.
> > Any
> > >thoughts? Thanks a lot!
> > >
> > >==========================
> > >  cap program drop mycmd
> > >   program mycmd, rclass byable(recall)
> > >    version 8.0
> > >    syntax namelist [if] [in] [pw]
> > >    gettoken subcmd namelist: namelist
> > >    gettoken lhs namelist: namelist
> > >    loc rhs "`namelist'"
> > >
> > >    di in r "`subcmd'"
> > >    di in r "`lhs'"
> > >    di in r "`rhs'"
> > >    di in r "`weight'"
> > >    di in r "`exp'"
> > >
> > >  end
> > >
> > >============================
> > >
> > >Everytime I launch the command by specifying weight option alone, I
> > always
> > >get an error message. Note that lwg is a real variable 
> name and I have a
> > >working data set in memory.
> > >
> > >******
> > >. mycmd this is another issue [pw=lwg]
> > >[ invalid name
> > >r(198);
> > >
> > >end of do-file
> > >r(198);
> > >******
> > >
> > >However, if I work off a real data set and specify if 
> condition before
> > >[pw=lwg], everything works fine. Note here k5 is a real variable.
> > >
> > >******
> > >. mycmd this is another issue if k5==3 [pw=lwg]
> > >this
> > >is
> > >another issue
> > >pweight
> > >= lwg
> > >******

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