Re: st: Dropping variables conditionally

[Ron�n Conroy <rconroy@rcsi.ie>]

Ian Watson wrote:

> My last message had it's first paragraph swallowed by the server. It
> read:
>
>
>   Is there an easy way to drop variables depending on certain
>   conditions. The syntax for -drop- shows no if qualifier is allowed
>   for the varlist syntax, only for the observation syntax. 
Try -dropmiss-, written by the prolific Nick Cox.

Alternatively, if you needed to apply more complex conditions, you could 
add a prefix such as drop_ to the names of the variables that met the 
conditions, then drop them using

drop *_drop



--

Ronan M Conroy (rconroy@rcsi.ie) 
Senior Lecturer in Biostatistics 
Royal College of Surgeons 
Dublin 2, Ireland 
+353 1 402 2431 (fax 2764) 
-------------------- 
Just say no to drug reps 
http://www.nofreelunch.org/

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