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RE: st: RE: RE: Chemometrics functions


From   "James Hesford" <HESFORD@olin.wustl.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: RE: RE: Chemometrics functions
Date   Mon, 16 Dec 2002 13:08:42 -0600

I thought it would be possible to do PLS in Stata. Although a relative newcomer to Stata, I'm not surprised to hear that it is possible. But to the original point, I thought it might be easier for James to use available software (especially given his comment re: knowledge of statistics). Just my two cents. :-)

Jim


-----Original Message-----
From:	A.J. Rossini [mailto:rossini@blindglobe.net]
Sent:	Mon 12/16/2002 12:55 PM
To:	statalist@hsphsun2.harvard.edu
Cc:	
Subject:	Re: st: RE: RE: Chemometrics functions
>>>>> "nick" == Nick Cox <n.j.cox@durham.ac.uk> writes:

    nick> James Hesford
    >> For partial least squares (PLS) I have used PLSGraph by 
    >> Wynne Chin of the University of Houston. The product is in 
    >> beta release and it appears to have fallen off his radar 
    >> screen. From what I know of Stata, it may be possible but  
    >> not really feasible.

    nick> I don't know this distinction means. 

    nick> There is no reason I can see why PLS 
    nick> would not be programmable in Stata. However, 
    nick> it is not clear that anyone has done it. 

I'll take the opposite tact - it is clear that it can be done in
Stata.  Most of the tools (matrix decompositions) exist.  Just do it
:-). 

best,
-tony

-- 
A.J. Rossini				Rsrch. Asst. Prof. of Biostatistics
U. of Washington Biostatistics		rossini@u.washington.edu	
FHCRC/SCHARP/HIV Vaccine Trials Net	rossini@scharp.org
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