mag.m

这里面有很多有用的东东

function n = mag(X)
%MAG
%The magnitude of a vector X.
%Calling format: mag(X)

%Copyright Gareth Williams, Stetson University 
[e-mail], http://www.stetson.edu/~gwilliam
%Accompanies "Linear Algebra with Applications" by Gareth Williams

n = sqrt(X*X');