search for: rpf3n

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2002 Jun 11
2
Puzzled by what Rprof is telling me
...9; is a numeric matrix with 128347 rows; I need to apply a function, sfun(), to each of 4191 subsets of rows, indexed by indat$grpi. sfun() is fairly complex, and requires information from all of the columns of inmat, so simple uses of, for example, aggregate() don't do the job. Rprof('Rpf3n') for (i in unique(indat$grpi)) { ssnew[i,] <- sfun(inmat[indat$grpi==i,,drop=FALSE]) } Rprof(NULL) ----------------- Rprof output, v1 ---------------- Each sample represents 0.02 seconds. Total run time: 404.999999999922 seconds. Total seconds: time spent in function and callees. Self...