Re: eig(A,'nobalnace') normalized eigenvectors. Help says otherwise


"marky" <no@xxxxxxxxx> wrote in message news:f2bqq0$6d7$1@xxxxxxxxxxxxxxx

Nasser Abbasi wrote:
Help on eig says:

"Note For eig(A), the eigenvectors are scaled so that the norm of each
is 1.0. For eig(A,B), eig(A,'nobalance'), and eig(A,B,flag), the
eigenvectors are not normalized."

But I am getting them out to be normalized when using 'nobalance'. Am I
overlooking something here?



Maybe it's just a coincidence with your A:

NO it is NOT, did you try to check before answering?

I don't see what the problem is here. Denormalizing is easy to do by hand.

If it is easy by 'hand' to de-normalize the result, then why did you not do
it to find out for your self that it is NOT a coincidence?

The matrix A is

EDU>> A=[5 20;20 80];

The eigenvectors when not normalized are

[1;4] and [-4;1]

and not 'by coincidence' as given

[-0.970142500145332 0.24253562503633]
[0.242535625036333 0.970142500145332]

Matlab normalized them. Even though according to the help, it should NOT
have done so.

I don't see what the problem is here.

You still do not 'see' the problem?

Nasser


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