[R] R memory question (fwd)

[ripley@stats.ox.ac.uk]

Sounds like the design matrix is 21632*12 by over 2*21632. That's 10
billion numbers.  You can't do that in 4Gb of memory, and doubt you
actually have 4GM bytes.

If this really makes statistical sense you will have to exploit the
special structure that makes it sensible.

On Thu, 5 Sep 2002, Jing Wu wrote:

> Dear all,
>
> I am trying to use rlm in MASS to do an analysis on a 21632*12 matrix.
> There are 4  factors A,D,V,G; A of level 6, D of level 2, V of level 2, G
> of level 21632, and 21632*12 observations Y. The data format is
> A D V G Y
> 1 1 1 1 0.1
> 1 1 1 2 0.2
> ...
>
> The command I use is rlm(Y~A+D+V*G,data=data.dat)
>  I got the same error message:
> Error in rep(data, t1) : cannot allocate vector of length 467748756
>
> I am using a unix machine of 4GM memory. I would like to know if R is
> using all the available memory and/or how much memory R would use to
> handle is data set.
>
>
> Jing
>
>
>
>
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-- 
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)
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