On 07/04/2013 09:41 PM, Assaf Gordon wrote: > Hello, > > Regarding old discussion here: > http://lists.gnu.org/archive/html/coreutils/2011-02/msg00030.html > > Attached is a patch with adds "--repetition" option to shuf, enabling random > number generation with repetitions. > > Example: > > to generate 50 values between 0 and 9: > $ shuf --rep -i0-9 -n50 > > Comments are welcomed, > -gordon
I like this. --repetition seems to be a very good interface too, since it aligns with standard math nomenclature in regard to permutations. I'd prefer to generalize it though, to supporting stdin as well as -i. You could disable reservoir-sampling in that case, thus buffering all input and allowing trivial selection from that. For extra bonus points though one could use reservoir-sampling with replacement: https://www.siam.org/proceedings/datamining/2004/dm04_053parkb.pdf That could/should be done as a separate patch though. cheers, Pádraig.
