Carl: "Almost anything you can do in a for() loop can be done easier and faster with vectorization.-- "
That is false: while this is certainly true for a great many basic vectorized operations, it is certainly false for most other things -- simulations are a typical example. Note that __ply type operations in base R, plyr , and other packages are (generally) _not_vectorized; they are "disguised" loops. Explicit for() loops are often just as fast or even a bit faster, though many of us prefer what we consider the more transparent functional style code of the __ply's. Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm [[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.
