[R] select rows with identical columns from a data frame

[Bert Gunter]

But David W. and Bill Dunlap gave you solutions that also work and are
much faster, no?!

-- Bert

On Sat, Jan 19, 2013 at 9:41 PM, Sam Steingold <sds at gnu.org> wrote:
>> * Rui Barradas <ehvconeenqnf at 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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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

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