From: David Kane
Thanks to Andy Liaw, Douglas Bates and Marcel Wolters for spending time on my
Thanks again to all,
Dave Kane
This archive was generated by hypermail 2.1.3
: Wed 10 Mar 2004 - 08:18:20 EST
Date: Thu 19 Jul 2001 - 22:45:05 EST
Message-id: <15190.54865.919806.670532@gargle.gargle.HOWL>
problem. In summary, there does not seem to be a built in colSums in R as there
is in S+ 6.0. However, Doug Bates was kind enough to send me a simple math
utilities package that has a version of colSums in C. The package installed
without a hitch and produced similar performance to the S+ colSums function (in
my simple tests). Both Andy Liaw and Marcel Wolters pointed out that the built
in matrix operators (like %*%) are likely to be faster than apply, especially
if one has compiled R with the Atlas library (which I have not yet done).
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