[R] complex splits

Pierre Kleiber pkleiber at honlab.nmfs.hawaii.edu
Fri Aug 16 02:30:08 CEST 2002


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

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
  "God could have told Moses about galaxies and mitochondria and
   all.  But behold... It was good enough for government work."

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