[R] How to speed up regressions (related to data.frame)

Jean-Christophe BOUËTTÉ jcbouette at gmail.com
Tue Sep 6 22:02:56 CEST 2011

I just tried

it seems it works on vectors too, but maybe I miss something.

2011/9/6 Bos, Roger <roger.bos at rothschild.com>:
> All,
> I have a function that runs a set of regressions (using the rlm
> function) and I notice that it run much slower on my 64-bit R than it
> does on my 32-bit R.  I guess the bigger bit size slows it down.
> Anyway, I looked into Rprof to see how I can speed it up.  I saw that
> 78% of the total time is spent in [.data.frame, so I tried converting my
> data to a matrix using data.matrix, but then rlm complained that data
> needs to be in the form of a data.frame.  Am I stuck or is there still
> maybe a way to speed up my function?
> Thanks,
> Roger
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