[R] aggregate?

From: alex diaz <celebridades_at_megamail.pt>
Date: Sat 18 Jun 2005 - 09:56:35 EST

Dear all:

Here is my problem:

Example data:

If I wanted to aggregate each level of column dat$x I could use:

But I just want to aggregate two levels (“c” and “d”) to obtain a new level “e”
I am expecting something like:

  x y
1 a 10
2 b 11
3 e 25
4 a 14
5 b 15
6 e 33

How can I make it?
Thanks in advance and best for all

  1. Diaz

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