On Wed, 2009-02-11 at 18:49 -0600, John Kerpel wrote: > Hi folks! > Does anyone know why I might see something like this after running > system.time? > > system.time(svd(Mean_svd_data)) > user system elapsed > 0 0 0 > > The data set is tiny and the function returns results instantly, but > shouldn't it still give me a time?
Jim has already suggested why this might be the case. When I'm testing the speed of things like this (that are in and of themselves very quick) for situations where it may matter, I wrap the function call in a call to replicate(): system.time(replicate(1000, svd(Mean_svd_data))) to run it 1000 times, and that allows me to judge how quickly the function executes. HTH G > > Thanks, > > John > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Dr. Gavin Simpson [t] +44 (0)20 7679 0522 ECRC, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
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______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
