Hello,
One more question.. I have the data.frame "pop":
xloc yloc gonad ind Ene W Area
1 23 20 516.74 1 0.02 20.21 1
2 23 20 1143.20 1 0.02 20.21 1
3 23 20 250.00 1 0.02 20.21 1
4 22 15 251.98 1 0.02 18.69 2
5 22 15 598.08 1 0.02 18.69 2
6 21 19 250.00 1 0.02 20.21 3
7 22 20 251.98 1 0.02 18.69 4
8 22 20 598.08 1 0.02 18.69 4
and I need to extract 50% (or rounded) of the rows for each Area (from
Area 1 to 3 only):
xloc yloc gonad ind Ene W Area
1 23 20 516.74 1 0.02 20.21 1
2 23 20 1143.20 1 0.02 20.21 1
4 22 15 251.98 1 0.02 18.69 2
6 21 19 250.00 1 0.02 20.21 3
I did this within a loop, but considering my data.frame has more than
10,000 rows and within other loops it makes my code run forever! Any
hints? Thanks!!
Nico
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