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!).
Tom
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