[R] Summary of variations in how long commands take

David Kane <David Kane a296180 at mica.fmr.com
Tue Jul 17 21:30:58 CEST 2001

Thanks to Guido Masarotto, Brain Ripley and Andy Liaw for (remarkably) quick
answers to my (stupid!) question. As all three noted, I should be using
system.time() instead of proc.time().

Andy also noted that he used constructions like:

my.f <- function(x) {
start <- proc.time()
[some steps]
now <- proc.time()
cat("first step took ",now-start," seconds.\n")

to examine timing within a given function. 

Thanks again for a marvelous program. 


Dave Kane
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