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RE: st: Programming question.

Subject   RE: st: Programming question.
Date   Thu, 18 Aug 2005 14:09:46 -0400

Nick, Tom,
Thanks for support.
I've gone the way suggested by Tom,
though Nick's code gave me new ideas for
another program I want to implement.
Thanks very much.
Best regards.

                      n j cox                                                                                                                  
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                      Sent by:                         cc:                                                                                     
                      owner-statalist@hsphsun2.        Subject:  RE: st: Programming question.                                                 
                      08/18/2005 01:55 PM                                                                                                      
                      Please respond to                                                                                                        

I agree. If abbreviations are to be allowed,
then this approach needs to be modified;
and Tom's method has a definite edge.


Steichen, Thomas J.

Nick Cox writes:
 > local wants_pca = inlist("`method'", "pca")
 > local wants_fac = inlist("`method'", "factor")
 > local wants_mca = inlist("`method'", "mca")
 > if (`wants_pca' + `wants_fac' + `wants_mca') == 0 {
 >           di as err "need at least one of factor pca mca"
 >           exit 198
 > }

One would need to consider ramifications of abbreviations
of "pca", "factor", and/or "mca".  I suspect (but have not
tested) that such would lead to problems via this approach.
Abbreviations of separate options would be handled by Stata's
parser in the expected manner.

My KISS approach (separate options) avoids these unparsed
nested option issues and is quite Stataish (and, though suboptions,
a la graph8, have become more mainstream, I find them much
harder to punctuate correctly!).
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