> * Rui Barradas <ehvconeen...@fncb.cg> [2013-01-18 21:02:20 +0000]:
>
> Try the following.
>
> complete.cases(f) & apply(f, 1, function(x) all(x == x[1]))

thanks, this works, but is horribly slow (dim(f) is 766,950x2)

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