norm square
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Wayne King
2012-2-23
Is Pu a vector resulting from multiplying a vector by a matrix
P = randn(2,2);
u = randn(2,1);
norm(P*u,2)
1 个评论
Jaromir Kabelac
2020-3-3
This is not true.
norm(x, 2)
is the same as
norm(x)
and calculates the 2-norm (or Euclidian norm) of x, which could be denoted as 
, or usually just as 
.
, or usually just as .What you probably want is the square of the norm, hence
norm(x)^2
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Jonathan Sullivan
2012-2-23
Have you tried
CRE = norm(P)^2;
help norm
doc norm
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