Message-ID: <Pine.GSO.4.31.0103220845550.5675-100000@auk.stats>
Date: 2001-03-22T08:49:55Z
From: Brian Ripley
Subject: out of memory?
In-Reply-To: <58957652691.20010322113006@chat.ru>
On Thu, 22 Mar 2001 news_vkhamenya at chat.ru wrote:
> Hello r-help,
>
> why call:
>
> #----------
> outer(1:1000, 1:2, function(r,c) ifelse(m[r,c]<=0,.0001,m[r,c]) )
> #----------
>
> for matrix m with only 1000 rows and 2 columns forces my PC to use
> more than 250Mb(!) of virtual memory? strange...
Um, a strange use of outer. Try
m[m <= 0] <- 0.0001
for an efficient solution.
--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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