[R] hard to believe speed difference
rossini at blindglobe.net
Thu Aug 8 18:31:19 CEST 2002
>>>>> "michael" == Michael Camann <mac24 at humboldt.edu> writes:
michael> Like many of us on this list (I presume), I've been writing computer code
michael> for twenty-five years or so in a wide variety of languages. I started
michael> using S-Plus in 1991 and switched to R when I took my present job in 1997.
michael> The point of this is that despite a decade or so of S/R experience, I've
michael> only recently, within the last couple of years, begun to write R code that
michael> makes efficient use of the language, particularly with regard to
michael> eliminating loops. Old habits die hard, especially coding paradigms that
michael> are efficient solutions in many environments but not in R.
There's a wonderful book called S Programming, by Venables and Ripley
(familiar names, eh?), which should be a must-read in this case. See:
for more details. It's not clear that one could write a "lint" to
check for inefficiency; lint doesn't do that for C!
A.J. Rossini Rsrch. Asst. Prof. of Biostatistics
U. of Washington Biostatistics rossini at u.washington.edu
FHCRC/SCHARP/HIV Vaccine Trials Net rossini at scharp.org
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