Re: [eigen] Complex number divided by real

[Carlos Becker <carlosbecker@xxxxxxxxx>]

Sorry, I meant this with the last snippet:

MatrixXf nn,xx;

xx = nn.colwise().normalized();

Somehow it makes sense, since it is not a partial reduction in this case, because it returns a vector and not a single element (if it existed of course)

On Thu, Jul 22, 2010 at 12:25 PM, Carlos Becker <carlosbecker@xxxxxxxxx> wrote:

Nice idea, but .rowwise().normalized() doesn't compile.

I guess that normalized() hasn't been coded into row or col-wise ops, since this doesn't work either:

    MatrixXf nn;

    VectorXf    a,b;

    b = nn.colwise().normalized();

cheers

On Wed, Jul 21, 2010 at 11:17 PM, Christoph Hertzberg <chtz@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Carlos Becker wrote:

Hi everyone,
(first, I am using the dev branch)

I am trying to do something like (a.array() * b.array().conjugate()) / (
a.array().abs() * b.array().abs() ), where a and b are two VectorXcf.

Wouldn't something like this work in your case? (I didn't actually try it ...)

(a.array() * b.array().conjugate()).rowwise().normalized();

Because:
abs(a)*abs(b) = abs(a)*abs(conj(b)) = abs(a*conj(b))

Actually, an elementwise signum function would be helpful in that case.



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