What is the difference of using 2L versus 2 as the margin argument in the
apply() function? Where can I find detailed information on all of the
possible margin arguments?
> x
[,1] [,2]
[1,] 1 2
[2,] 3 4
[3,] 5 6
[4,] 7 8
[5,] 9 10
> sqrt(apply(x, *2L*, function(r.st) var(r.st[!is.na(r.st)])))
[1] 3.162278 3.162278
> sqrt(apply(x,* 2*, function(r.st) var(r.st[!is.na(r.st)])))
[1] 3.162278 3.162278
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