nchoose3

All combinations of three elements.

NCHOOSE3 - all combinations of three elements
Y = NCHOOSE3(X) returns all combinations of three elements of the array X.
It is the fast, vectorized version of NCHOOSEK(X,3). X can be any type
of array. When X is a scalar integer > 1, it returns X*(X-1)*(X-2)/6.

Example:
nchoose3([10 20 30 40 50])
% -> 10 20 30
% 10 20 40
% 10 20 50
% 10 30 40
% 10 30 50
% 10 40 50
% 20 30 40
% 20 30 50
% 20 40 50
% 30 40 50

nchoose3({'a','b','c','d','e'})
% -> {'a'} {'b'} {'c'}
% {'a'} {'b'} {'d'}
% {'a'} {'b'} {'e'}
% {'a'} {'c'} {'d'}
% {'a'} {'c'} {'e'}
% {'a'} {'d'} {'e'}
% {'b'} {'c'} {'d'}
% {'b'} {'c'} {'e'}
% {'b'} {'d'} {'e'}
% {'c'} {'d'} {'e'}

See also NCHOOSEK, PERMS, NEXTPERM
NCHOOSE2, PERMN, NCHOOSE, ALLCOMB (on the File Exchange)

version 1.0 (Wednesday, 12. December 2018)
(c) Sebastian J. Schlecht
https://www.sebastianjiroschlecht.com/

Heavily inspired by NCHOOSE2 by
(c) Jos van der Geest
email: [e-mail]
http://www.mathworks.nl/matlabcentral/fileexchange/authors/10584