Date:         Sun, 20 Feb 2005 14:36:43 +0100
Reply-To:     Datametric <datametric@CLUB-INTERNET.FR>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Datametric <datametric@CLUB-INTERNET.FR>
Subject:      RE : PROC IML: BY statement
Comments: To: von-hippel.1@OSU.EDU
In-Reply-To:  <1108789672.844979.319050@z14g2000cwz.googlegroups.com>
Content-Type: text/plain; charset="iso-8859-1"

Hi,

Paige Miller and Dave McLerran wrote a good answers in 2002 about your
question :

http://www.listserv.uga.edu/cgi-bin/wa?A2=ind0201B&L=sas-l&P=R8817



Stéphane.

-----Message d'origine-----
De : SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] De la part de Paul T.
von Hippel
Envoyé : samedi 19 février 2005 06:08
À : SAS-L@LISTSERV.UGA.EDU
Objet : PROC IML: BY statement


The BY statement in, for example, PROC REG is very fast -- much faster than
calling PROC REG once for every value of the BY variable.

I am writing a modified regression procedure in PROC REG. What is the best
way to mimic the speed and functionality of the BY statement?

Many thanks,
Paul von Hippel