Path: utzoo!mnetor!tmsoft!itcyyz!yrloc!hui
From: hui@yrloc.ipsa.reuter.COM (Roger Hui)
Newsgroups: comp.lang.apl
Subject: Re: Statistical Functions in J
Message-ID: <1991May22.130848.1892@yrloc.ipsa.reuter.COM>
Date: 22 May 91 13:08:48 GMT
References: <1991May12.145907.19563@yrloc.ipsa.reuter.COM> <356@tslwat.UUCP> <1991May21.042804.21102@yrloc.ipsa.reuter.COM> <1991May21.162624.18312@jato.jpl.nasa.gov>
Reply-To: hui@yrloc.ipsa.reuter.COM (Roger Hui)
Organization: Iverson Software Inc.
Lines: 19

Sam Sirlin writes:

>I can calculate means and standard deviations pretty easily in APL or J.
>On the other hand, what about FFT's or PSD's? These would have applicability
>beyond just statistics. Of course once linkc (sp?) is available we can all
>build our own. It seems to me that APL was a pioneer in including solutions
>to linear equations (domino) in the language, but that now the standard is
>somewhat higher (Matlab, Mathematica, ...) and includes EISPACK, LINPACK, 
>and FFT's. Of course these make the code size grow...

Yes, LinkJ is the preferred means for access to FFT, LP, and other more
specialized routines.  The advantages are twofold:  it avoids duplicating
the excellent work of others, and it avoids having to support the facility
forever more.

-----------------------------------------------------------------
Roger Hui
Iverson Software Inc., 33 Major Street, Toronto, Ontario  M5S 2K9
(416) 925 6096