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st: RE: RE: RE: RE: RE: tabulation of variables


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: RE: RE: RE: tabulation of variables
Date   Mon, 23 Sep 2002 16:55:22 +0100

Banya, Winston
>
> Thanks Nick [Winter]. It seems to work but some of the variables are
> not numeric and
> so when I took that into account I am geeting an error message.
>
> I wrote in  the last line you sent me: list 'v2' if 'v1'==.
> | 'v1'=="&" and
> then the error message was that 'v1'is an invalid name.
> Note the in this
> database the missinbg value for a string variable is
> designarted as &. How
> can I modify it ?

Whatever the variable,

`v1' == . | `v1' == "&"

will be illegal. If the variable is numeric,
then it cannot be compared with a string,
and indeed vice versa.

I would replace

"&"

by

""

and use -missing()- in any case
to test for missings. That will work
across numerics and strings.

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

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