| [eigen] Re: JacobiSVD API changed and functionality expanded |
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- To: eigen <eigen@xxxxxxxxxxxxxxxxxxx>
- Subject: [eigen] Re: JacobiSVD API changed and functionality expanded
- From: Benoit Jacob <jacob.benoit.1@xxxxxxxxx>
- Date: Fri, 8 Oct 2010 10:49:33 -0400
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2010/10/8 Benoit Jacob <jacob.benoit.1@xxxxxxxxx>:
> Hi,
>
> just a quick note --- more details will follow in beta2 announcement.
> JacobiSVD's API just changed a lot, see the new class documentation
> (currently in the source until online docs get updated).
>
> template params: JacobiSVD<MatrixType, QRPreconditioner>
>
> the QRPreconditioner param is optional, so you can ignore it. But you
> can also set it to other values to get something faster / smaller
> executable etc, at the cost of less safety and accuracy.
>
> The biggest API change is that if you want U or V, you not have
I meant you *now* have to....
> to
> tell it explicitly at runtime, when you compute the decomposition.
> The biggest feature addition is that you can now get thin U / V.
>
> Examples:
> JacobiSVD<MatrixXf> svd(matrix); // compute only singular values, no U, no V
> JacobiSVD<MatrixXf> svd(matrix, ComputeThinU | ComputeFullV); //
> compute thin U and full V
> Upcoming: solve(), which will allow to get rid of our crappy,
> borrowed-from-elsewhere SVD class.
>
> Benoit
>