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2011 Oct 17
2
how to use 'which' inside of 'apply'?
Hello R-community,
I am trying to populate a column (doy) in a large dataset with the first
column number that exceeds the value in another column (thold) using the
'apply' function.
Sample data:
pt D1 D17 D33 D49 D65 D81 D97 D113 D129 D145 D161 D177
D193 D209 D225 D241 D257
1 39177 0 0 0 0 0 0 0 0 0.4336 0.4754 0.5340667 0.5927334
0.6514 0.6966 0.5900 0.5583 0.5676
2 39178 0 0 0 0 0 0...