[R] extracting data from a dataframe

Tim Wilson wilson at visi.com
Fri Aug 2 17:31:46 CEST 2002

Hi everyone,

Here's a question about extracting data from a dataframe:

Let's say I've got a dataframe with two vectors, TEST and GENDER. GENDER
contains a 1 for males and 2 for females. I want to separate the results
of TEST by GENDER so I can compare their means.

What's the most efficient way to do this with R?


Tim Wilson      |   Visit Sibley online:   | Check out:
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