G'day R-helpers,
I want to subsample rows of a large table based on the value in its
first column. Of all rows sharing the same value in the first column I
want to RANDOMLY extract only one.
Thanks in advance,
Achim
example input
1 15 34
1 4 66
1 24 65
2 23 47
2 9 36
3 58 9
3 38 64
3 12 64
3 4 15
4 1 88
4 23 90
desired output
1 4 66
2 23 47
3 12 64
4 1 88
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