[R] Reducing execution time

[Bert Gunter]

Not entirely sure I understand, but match() is already vectorized, so you
should be able to lose the supply(). This would speed things up a lot.
Please re-read ?match *carefully* .

Bert

On Jul 27, 2016 6:15 AM, "sri vathsan" <srivibish at gmail.com> wrote:

Hi,

I created list of 3 combination numbers (mycombos, around 3 lakh
combinations) and counting the occurrence of those combination in another
list. This comparision list (mylist) is having around 8000 records.I am
using the following code.

myCounts <- sapply(1:nrow(myCombos), FUN=function(i) {
  sum(sapply(myList, function(j) {
    sum(!is.na(match(c(myCombos[i,]), j)))})==3)})

The above code takes very long time to execute and is there any other
effecting method which will reduce the time.
--

Regards,
Srivathsan.K

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