[R] split data frame by factor

From: ivan <i.petzev_at_gmail.com>
Date: Mon, 25 Apr 2011 23:28:00 +0200


Dear Community,

I have a dataframe like this one:

A	B
5	1
6	1
7	1
8	1
9	2
10	2
11	2
12	2

I have a problem splitting up the above data frame in respect to the factor represented by B, whereas the resulting vector should contain the numeric values only. I tried split() but it produces this: A B
[1]

5	1
6	1
7	1
8	1

[2]
9 2 10 2 11 2 12 2

I want to achieve this,though:

A
[1]

5
6
7
8
[2]


9
10
11
12

How is this done? Thank you very much in advance.

Best Regards.



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