what is the function that the same as perms however can used n more than 10?

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when i build a coding i used n less than 10, i used perms function.. then when get the correct coding the i test the coding in various size of n, which is n more than 10, however the length for perm is less than 10. what is the same function as perm, but can used for n more than 10?

Accepted Answer

OCDER on 3 Jul 2018
I think you need to make your own function of perms, but one that only returns 1 of many permutations at a time. When you past n = 10, you'll run out of memory fast.
3.5 GB n = 11
46.0 GB n = 12
647.6 GB n = 13
9764.0 GB n = 14
One suggestion is to make a classdef object that track the ith permutation and will continuously return the the next permutation. But read this link as your attempt to compute permutations for n >> 11 gets fairly impossible...
sharifah shuthairah syed abdullah
i know this is an NP hard problem i have been doing this amlost 4 years now..i used randperm but it didnt satisfied my need....i also will also consider making MEX/C++ files after this...this stage is about finding optimal solution using branch n bound..i know need a lot of time for that...later i will use GA.. thank you everyone for answering my question..thank you so much

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More Answers (1)

Stephen23 on 3 Jul 2018
One option would be to use a permutation generator, which does not store all permutations in memory:
I leave it up to the reader to decide if running through all permutations is tractable or not.

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