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How to Design logic for grouping of variables

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Atinesh Singh
Atinesh Singh on 26 Apr 2017
Closed: MATLAB Answer Bot on 20 Aug 2021
Suppose we have a variable called 'group' which contains grouping information
group = [ {1}, {2}, ..., {D} ]
We have to maintain a counter for every pair (i, j) where i, j are in the range [1 D] and for all those pairs whose count(i, j) >= 5, these pairs are merged.
Example:
D = 5
group = [ {1}, {2}, {3}, {4}, {5} ]
(1, 2) = 7
(2, 3) = 10
(3, 4) = 2
(4, 5) = 20
hence pairs are merged and the resultant group is
group = [ {1 2 3}, {4 5} ]
in my problem D can have a value of 1000, what is the efficient way to implement this logic
  1 Comment
Stephen
Stephen on 26 Apr 2017
I get the feeling that this is part of a larger task, which possibly could be efficiently solved using accumarray. You should read these: http://xyproblem.info/

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