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15.4.2  ℓ2 matrix norm

The ℓ2 norm of a matrix is an operator norm (see Section 15.4.6) induced by the ℓ2 norm on vectors (see Section 14.1.1). The l2norm or norm command computes the ℓ2 norm of a matrix.

Example

l2norm([[1,2],[3,-4]])
     
5.11667273602           

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