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Path: utzoo!linus!philabs!cmcl2!rna!dan
From: dan@rna.UUCP (Dan Ts'o)
Newsgroups: net.math.stat
Subject: S seems incredibly slow...
Message-ID: <316@rna.UUCP>
Date: Sat, 17-Nov-84 15:43:37 EST
Article-I.D.: rna.316
Posted: Sat Nov 17 15:43:37 1984
Date-Received: Sun, 18-Nov-84 22:38:31 EST
Organization: Rockefeller Neurobiology, NYC
Lines: 29

Hi,
	S on our 11/750 - 4.2BSD seems very slow. I know that this situation
can be improved by binding commonly used functions into S's executive. How
much of an improvement can reasonably be expected ? Any hints as to which
functions are good candidates ?
	Here are two S examples which take 10-30 minutes to execute:

	s _ matrix(0, 20, 20)
	for (i in 1:20) {
		for (j in 1:20) {
			s[i,j] _ sin(j/10)
		}
	}

and
	m _ matrix(read("/tmp/junk"), 100, 100)		#read 100x100 matrix

	We are beginning S users and are thus naive about the "best" way of
doing things. Thanks.


					Cheers,
					Dan Ts'o
					Dept. Neurobiology
					Rockefeller Univ.
					1230 York Ave.
					NY, NY 10021
					212-570-7671
					...cmcl2!rna!dan