[R] reshaping data?
Karin Lagesen
karin.lagesen at medisin.uio.no
Thu Sep 29 15:16:02 CEST 2005
I have a file like this:
a 0.1
a 0.2
a 0.9
b 0.5
b 0.9
b 0.7
c 0.6
c 0.99
c 0.88
Which I would like to get to be the following matrix:
0.1 0.2 0.3 0.4 ...
a 1 2 0 0
b 0 0 0 0
..
I.e: each place in the matrix denotes how many entries in each
category that are betwee 0.0 and 0.1, 0.1 and 0.2 and so on.
The way I was thinking of doing it was by constructing an empty matrix
and then doing a for loop testing each element and incrementing in the
matrix as appropriate. However, it struck me that this has to be
easier to do than that. Am I right?
Karin
--
Karin Lagesen, PhD student
karin.lagesen at medisin.uio.no
http://www.cmbn.no/rognes/
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