Message-ID: <3D5C4790.9040207@honlab.nmfs.hawaii.edu>
Date: 2002-08-16T00:30:08Z
From: Pierre Kleiber
Subject: complex splits
split(d$splitcol,paste(d$col1,d$col2))
will give you vectors as elements of a list based on possible
combinations of col1 and col2. Is that what you're after?
Cheers, Pierre
Tim Wilson wrote:
> Hi everyone,
>
> I'm having trouble figuring out how to split a dataframe more than once.
>
> Let's say I have a dataframe d with a certain column called splitcol
> composed of four possible ordinal values. The same dataframe has
> two other columns, col1 and col2, that have one of two possible values
> each. I'd like to split d$splitcol based on col1 and col2 so I can report
> frequencies of the subgroups.
>
> So if col1 and col2 can each have two different values, after splitting
> I should have four vectors based on d$splitcol.
>
> Can I do this in one step, or do I need to do some intermediate
> splitting?
>
> -Tim
>
>
--
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Pierre Kleiber Email: pkleiber at honlab.nmfs.hawaii.edu
Fishery Biologist Tel: 808 983-5399/737-7544
NOAA FISHERIES - Honolulu Laboratory Fax: 808 983-2902
2570 Dole St., Honolulu, HI 96822-2396
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