www.pudn.com > myMatlabfenlei.rar > binomial.m

function b = binomial(n,k) 
%BINOMIAL compute binomial coefficient 
% 
%  Usage: b = binomial(n,k) 
% 
%  Parameters:     ( n ) 
%              b = (   ) 
%                  ( k ) 
% 
%  Author: Steve Gunn (srg@ecs.soton.ac.uk) 
 
  if (nargin ~=2 | k>n | k<0 | n<0) % check correct number of arguments 
    help binomial 
  else 
      
     b = prod(k+1:n)/prod(1:(n-k)); 
      
  end