colsum.m

来自「一个关于RBF的神经网络算法」· M 代码 · 共 26 行

function s = colSum(X)
%  s = colSum(X)
%
%  Outputs a row vector whose elements are the
%  sums of the columns of X.
%  Designed to get round the feature of the standard
%  routine (sum) of summimg row vectors to a scalar.
%  If colSum is handed a row vector, the same vector
%  is given back.
%
%  Inputs
%
%    X     matrix (m-by-n)
%
%  Output
%
%    s     vector (1-by-n)

[m,n] = size(X);

if m > 1
	s = sum(X);
else
	s = X;
end