[R] matching pairs in a Dataframe?
Singu
singularitaet at gmx.net
Wed Aug 16 19:02:32 CEST 2006
Dear list,
I want to extract pairs of values out of a dataframe where one
criteria/condition does match.
I have an experiment with 3 conditions which were not always applied:
e.g.:
group cond x
A 1 2
A 2 4
A 3 6.5
B 1 3
B 2 4.5
C 1 2.5
C 3 4
D 2 5
D 3 6
E 1 1
E 2 4
E 3 6
Now I wanted to extract the x of those groups where condition 2 and
condition 3 do both exist.
In this example that would be groups A, D and E and the extracted pairs
e.g.:
cond2 cond3
4 6.5
5 6
4 6
(I need this for a wilcoxon test)
I would be happy if one could give me a hint, probably its very simple...
Thanks
Stefan Grosse
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