2楼: Originally posted by feixiaolin at 2017-04-29 16:18:55
http://cn.mathworks.com/help/matlab/ref/normest.html?requestedDomain=www.mathworks.com

X = randn(8,1);
norm(X,2)

sqrt(sum(abs(X).^2))

3楼: Originally posted by FMStation at 2017-04-29 22:04:51
The l2 norm of a vector is the square root of the sum of the absolute values squared


X = randn(8,1);
norm(X,2)



sqrt(sum(abs(X).^2))


http://mathworld.wolfram.com/L2-Norm.html
L2-Nor ...