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MultiCriteriaSort

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This is package extends the capabilities of the sorting functions to sort entire matrices on a set of columns/rows that are defined in set terms of descending priority.

New Sorting Methods

The sort!, sort and sortperm functions may be provided with an additional argument, keys::Vector{Int}, when provided with a AbstractMatrix to sort. The keys are an array of column or row indices that define which indices to sort on in descending order of priorty.

To sort a matrices rows using columns 1, 2 and 3 to sort:

a = [1 3 2; 1 2 3; 1 1 1; 3 4 4; 3 4 1; 3 4 2]
sort(a, [1:3])

Similarly to get the row permutation to sort the matrix use sortperm(a, [1:3]).

Each function is given an optional dim::Int argument which defines which dimension to sort (i.e. 1 = sort rows by values in given columns and 2 = sort columns by values in given rows). To sort the columns in matrix a by rows 1 and 2 use sort(a, [1,2], dim = 2).

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