extracting data from a dataframe

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?

No guarantees of efficiency, but the easiest is
  split(df$TEST,df$GENDER)

	-thomas


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