[R] Aggregating data

[Petr Pikal]

Similar answer as last time

aggregate, tapply, by or ppackage doBy

HTH

PS. If you want to add some other text then subject in your post do 
not use HTML posting as recommended in posting guide.

Petr


On 28 Nov 2006 at 22:04, David Kaplan wrote:

Date sent:      	Tue, 28 Nov 2006 22:04:09 -0600
From:           	David Kaplan <dkaplan at education.wisc.edu>
To:             	r-help at stat.math.ethz.ch
Subject:        	[R] Aggregating data

> 
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Petr Pikal
petr.pikal at precheza.cz