This should be theoretically very simple, but I dont get the elegant
answer (without looping).
I've got a long (thousands of rows) data frame:
> E.coor[1:10,]
east north dat
1 582650 4248850 0.8316848
2 582750 4248850 0.7230272
3 582850 4248850 0.3250818
4 582950 4248850 0.6144006
5 583050 4248850 0.8706312
6 583150 4248850 0.2149651
7 583250 4248850 0.1659519
8 583350 4248850 0.2145174
9 583450 4248850 0.1615151
10 583550 4248850 0.9370766
and need to extract those with the coordinates coinciding with those in a
smaller data frame (about one hundred rows):
> subset.coor
east north
20 584550 4248850
21 584650 4248850
22 584750 4248850
23 584850 4248850
24 584950 4248850
25 585050 4248850
i.e, I need the ~ one hundred E.coor rows that appear in subset.coor
Could you help with this.
Best regards,
Javier
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