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numreps
2015 Sep 09
0
sample.int() algorithms
...erence in timing
letting sample.int() choose the cutoff point versus manually
specifying the use of do_sample2():
### compare times for sample.int() vs internal function sample2()
compareSampleTimes = function(popSizeList=c(1e5, 1e6, 1e7, 1e8, 1e9),
sampleSizeList=c(10, 100, 1000, 10000),
numReplications=1000) {
for (sampleSize in sampleSizeList) {
for (popSize in popSizeList) {
elapsed1 = system.time(replicate(numReplications,
sample.int(popSize, sampleSize)))[["elapsed"]]
elapsed2 = system.time(replicate(numReplications,
.Internal(sample2(pop...