概述
combntns
All possible combinations of set of values 从给定集合set中列出所有可能的subset个元素的组合
Syntaxcombos = combntns(set,subset)
combos = combntns(set,subset)returns a matrix whoserowsare the various combinations that can be taken of the elements of the vector set of length subset.
Many combinatorial applications can make use of a vector1:nfor the input set to return generalized, indexed combination subsets.
Description
The combntns function provides the combinatorial subsets of a set of numbers.
It is similar to the mathematical expression a choose b, except that instead of the number of such combinations,the actual combinations are returned.
In combinatorial counting, the ordering of the values is not significant.The numerical value of the mathematical statement a choosebissize(combos,1).
Examples
How can the numbers 1 to 5 be taken in sets of three (that is, whati
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