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[S] [S:] Very Large Datasets

To: s-news@wubios.wustl.edu
Subject: [S] [S:] Very Large Datasets
From: Sama.LowChoy@env.qld.gov.au (Samantha Low Choy)
Date: Thu, 24 Feb 2000 16:38:56 +1000
Organization: Environmental Protection Agency
Sender: owner-s-news@wubios.wustl.edu
Hi All

I was wondering whether anybody had tried running an analysis,
such as a linear model using lm(),
on 1,500,000 responses with,
say 50-80 covariates?

in Splus...

I guess some pre-processing to decrease number of covariates may bring
them down to about 20-30.
And some aggregation of the responses could reduce their number by
factors of 16 or 100.

But I thought I would see how far people had pushed Splus (or R) in
terms of sample sizes,
before killing our machine!

Sama.

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Sama LowChoy
Environmental Modeller
Spatial Information and Analysis Unit
Environmental Protection Agency
GPO Box 155
Brisbane Albert Street QLD 4002
Ph (07) 3227 7726
Fax (07) 3227 6386
Email:  sama.lowchoy@env.qld.gov.au
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



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