Re: st: error message r(2000)

["louis boakye-yiadom" <louisby@hotmail.com>]

I've tried giving the -count- command again within the do file, using the 
actual list of variables in `varlist', separated by commas, and the result 
is 0. So there are actually no observations. I've got to figure out why 
there are no observations. Thanks a lot, Kit, Ronan, and Roger for your 
help.

Louis




> From: Roger Harbord <roger.harbord@bristol.ac.uk>
> Are you running the -count- command inside the do-file which defines 
> `varlist'? If not (e.g. you're running it from the command-line) then 
> `varlist' will not be defined as it's local to the do-file, and missing() 
> with no args is always true. If `varlist' contains >1 variable then 
> missing(`varlist') shouldn't in fact work as missing() takes a 
> comma-separated list not a varlist:
>
> . local varlist  price mpg rep78 headroom
>
> . di "`varlist'"
> price mpg rep78 headroom
>
> . count if ~missing(`varlist')
> pricempgrep78headroom not found
> r(111);
>
> . count if ~missing()
>   74
>
>
> Roger.
>
> --
> Roger Harbord
> Department of Social Medicine, University of Bristol
> http://www.epi.bris.ac.uk
>
>
> --On 31 March 2005 13:14 +0100 Ron�n Conroy <rconroy@rcsi.ie> wrote:
>
>
> > louis boakye-yiadom wrote:
> >
> > > Dear All,
> > > I get a "no observations" error message -r(2000)- when I execute a do
> > > file,
> > > and I'm having difficulty determining what's going wrong. According to
> > > the
> > > error message, I "have requested some statistical calculation and
> > > there are
> > > no observations on which to perform it. Perhaps you specified if exp
> > > or in
> > > range and inadvertently filtered all the data." I don't understand
> > > what is
> > > meant by "filtered all the data". The line that generates the error
> > > message
> > > is:
> > > regress lnW `varlist' if migst1==0
> > > To check whether there are actually no observations, I gave the following
> > > command (and had the shown output):
> > > count if migst1==0 & !mi(`varlist')
> > > 2720

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