Hi All,
I've been doing circles with this all morning, although I'm sure there's
a simple solution. I have a data.frame "pop" as follows:
> pop
ind xloc yloc gonad
1 1 5 2 12
2 1 5 4 25
3 1 3 3 30
4 1 5 4 10
5 1 1 4 08
. . . . .
10 1 1 4 11
And I need the following steps:
1. Sum "gonad" by combining (xloc, yloc) as follows and create
data.frame "fish":
> fish
ind xloc yloc gonad
1 1 5 2 12
2 2 5 4 35
3 1 3 3 30
4 2 1 4 19
2. Extract the 2 highest values of "gonad":
> new.fish
ind xloc yloc gonad
1 2 5 4 35
2 1 3 3 31
3. Delete "fish" from "pop" (2 data.frames).
Hope you get the idea and thanks for any help!!
Nico
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