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NCHOOSE2 - all combinations of two elements
Y = NCHOOSE2(X) returns all combinations of two elements of the array X. It is the fast, vectorized version of NCHOOSEK(X,2). X can be any type of array. When X is a scalar integer > 1, it returns X*(X-1)/2.
Example:
nchoose2([10 20 30 40])
% -> 10 20
% 10 30
% 10 40
% 20 30
% 20 40
% 30 40
nchoose2({'a','b','c','d','e'})
% -> 'a' 'b'
% 'a' 'c'
% ...
% 'c' 'e'
% 'd' 'e'
See also nchoosek, perms
combn, nchoose, allcomb (on the File Exchange)
인용 양식
Jos (10584) (2026). nchoose2 (https://kr.mathworks.com/matlabcentral/fileexchange/20144-nchoose2), MATLAB Central File Exchange. 검색 날짜: .
| 버전 | 퍼블리시됨 | 릴리스 정보 | Action |
|---|---|---|---|
| 3.2.0.1 | added image |
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| 3.2.0.0 | edited internal comments |
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| 3.1.0.0 | fixed bug for scalar input |
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| 3.0.0.0 | When X is a scalar integer > 1, it returns X*(X-1)/2. |
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| 2.2.0.0 | checked for R2017b, fixed comma's |
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| 1.0.0.0 | fixed error with input having less than 2 elements |
