Re: [eigen] Error: trying to recover Q matrix in sparse QR factorization |

[ Thread Index | Date Index | More lists.tuxfamily.org/eigen Archives ]

*To*: eigen@xxxxxxxxxxxxxxxxxxx*Subject*: Re: [eigen] Error: trying to recover Q matrix in sparse QR factorization*From*: Christoph Hertzberg <chtz@xxxxxxxxxxxxxxxxxxxxxxxx>*Date*: Wed, 08 May 2013 11:24:12 +0200

On 07.05.2013 20:40, Avneesh Saluja wrote:

OK, ideally what I would like to do is perform two QR decompositions (let's call them "left" and "right"), and take their resulting product Q_left^T * Q_right. You mentioned that I can directly use qr_factorizer.matrixQ() in expressions, but I'm unable to make it work. In code: [...] SparseMatrix<double> q1t_q2 = qr_factorizer_left.matrixQ().transpose()*qr_factorizer_right.matrixQ();

instead of w = q1t_q2*v;

Christoph -- ---------------------------------------------- Dipl.-Inf., Dipl.-Math. Christoph Hertzberg Cartesium 0.049 Universität Bremen Enrique-Schmidt-Straße 5 28359 Bremen Tel: +49 (421) 218-64252 ----------------------------------------------

**Follow-Ups**:**Re: [eigen] Error: trying to recover Q matrix in sparse QR factorization***From:*Avneesh Saluja

**References**:**[eigen] Error: trying to recover Q matrix in sparse QR factorization***From:*Avneesh Saluja

**Re: [eigen] Error: trying to recover Q matrix in sparse QR factorization***From:*Christoph Hertzberg

**Re: [eigen] Error: trying to recover Q matrix in sparse QR factorization***From:*Gael Guennebaud

**Re: [eigen] Error: trying to recover Q matrix in sparse QR factorization***From:*Avneesh Saluja

**Messages sorted by:**[ date | thread ]- Prev by Date:
**Re: [eigen] Error: trying to recover Q matrix in sparse QR factorization** - Next by Date:
**Re: [eigen] Rotations and unit vectors** - Previous by thread:
**Re: [eigen] Error: trying to recover Q matrix in sparse QR factorization** - Next by thread:
**Re: [eigen] Error: trying to recover Q matrix in sparse QR factorization**

Mail converted by MHonArc 2.6.19+ | http://listengine.tuxfamily.org/ |