nchoose2

Versione 3.2.0.1 (2,42 KB) da Jos (10584)
all combinations of two elements
5.0
(4)
2,7K download
Aggiornato 28 feb 2019

Visualizza la licenza

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)

Cita come

Jos (10584) (2024). nchoose2 (https://www.mathworks.com/matlabcentral/fileexchange/20144-nchoose2), MATLAB Central File Exchange. Recuperato .

Compatibilità della release di MATLAB
Creato con R2018b
Compatibile con qualsiasi release
Compatibilità della piattaforma
Windows macOS Linux
Categorie
Scopri di più su Argument Definitions in Help Center e MATLAB Answers
Riconoscimenti

Ispirato da: nCtwo

Ispirato: nchoose3, VChooseK

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Versione Pubblicato Note della release
3.2.0.1

added image
3.2.0.0

edited internal comments
3.1.0.0

fixed bug for scalar input
3.0.0.0

When X is a scalar integer > 1, it returns X*(X-1)/2.
2.2.0.0

checked for R2017b, fixed comma's
1.0.0.0

fixed error with input having less than 2 elements