I have different answer using 'norm'. Do I miss something?

2017 8 15
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更新时间：2017 8 15
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A = [1 2; 3 4];
norm(A) >> 5.4650
But equivalently,
sqrt(1^2 + 2^2 + 3^2 + 4^2) >> 5.4772
the answer is different
Do I miss something? thx!

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Torsten
Torsten 2017-8-15

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norm(A) and norm(A,'fro') are different things.
Best wishes
Torsten.

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Stephen23
Stephen23 2017-8-15
@penyao lu: the best way for you to say "thank you" is to accept Torsten's answer.
penyao lu
penyao lu 2017-8-15
thx for your remind! Stephen.

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