[R] subsets in data frame

Laura Holt lauraholt_983 at hotmail.com
Wed Jul 14 05:13:15 CEST 2004

Hello R People:

I have a data frame with 2 numeric variables and 1 factor.

There are 3 levels of the factor.

I would like to get sums/means/etc of the numeric variables with respect to 
the factor level.

I tried "table" and "subset" but have not hit upon a solution.

I thought maybe "apply" would be the answer but can't figure out how to 
break out by factor.

Any suggestions would be most appreciated.

Thanks yet again.
R Version 1.9.1 for windows
Laura Holt
mailto: lauraholt_983 at hotmail.com

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