combi.m

来自「一个利用元胞自动机进行生态仿真的matlab程序」· M 代码 · 共 19 行

function c=combi(n,k)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%  COMBI: Ruturn the combination
%
%	Fist Coded			4  June	 1997
%	Last Modefied		4  June  1997
%
%	Copyright (c)
%	T. Suzudo JAERI-CAIL
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% c     	 : combination
% n        : population
% k        : selected number
c=1;
for ii=1:k
	c=c*(n-ii+1)/(k-ii+1);
end