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st: Re: Invalid syntax in -xtdes- command


From   "Scott Merryman" <[email protected]>
To   <[email protected]>
Subject   st: Re: Invalid syntax in -xtdes- command
Date   Sat, 11 Oct 2003 09:02:19 -0500

----- Original Message ----- 
From: "West Addison" <[email protected]>
To: <[email protected]>
Sent: Friday, October 10, 2003 6:31 PM
Subject: st: Invalid syntax in -xtdes- command


> I have a panel data set and attempted to run the xtdes
> command on it in Stata version 7 for Windows.  The
> command started to run okay and produced the first few
> lines of output but then failed with the error message
> "invalid syntax r(198);".  My syntax looks fine as far
> as I can tell from the manual--I am just typing
> "xtdes" with no options--by I am new to this command
> and may be missing something.  Is there a bug in
> xtdes?  Here is what my log looks like:
>
> . use E:\Projects\HAP\DataSets\analysis.dta
>
> . tsset id_number time_from_intake
>        panel variable:  id_number, 394 to 1412
>         time variable:  time_from_intake, -24 to 12,
> but with gaps
>
> . xtdes
>
> id_number:  394, 399, ..., 1412
>       n =        288
> time_from_intake:  -24, -23, ..., 12
>       T =         37
>            Delta(time_from_intake) = 1; (12--24)+1 =
> 37
>            (id_number*time_from_intake uniquely
> identifies each observation)
>
> Distribution of T_i:   min      5%     25%       50%
>     75%     95%     max
>                          1       1       1         3
>       5      14      29
> invalid syntax
> r(198);
>
> .

The problem is that you have negative time values.  If you -set trace on- and
then run -xtdes- you will see that it chokes when tries to create a new variable
named _T`time value', but _T-24 is not a valid name.




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