Re: [eigen] GivensQR |

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*To*: eigen@xxxxxxxxxxxxxxxxxxx*Subject*: Re: [eigen] GivensQR*From*: Jitse Niesen <jitse@xxxxxxxxxxxxxxxxx>*Date*: Thu, 20 Aug 2009 17:12:23 +0100 (BST)

On Wed, 19 Aug 2009, Benoit Jacob wrote:

I was intrigued by the option of computing/storing only the sequence of Givens rotations, which doesn't seem like common practice at all; i was expecting a GivensQR class to compute/store Q and/or R according to what the user asked for.

So I wondered what was the use case for the approach of storing the sequence of Givens rotations, and it seems to me that the best use case for it should be when doing only 1 vector solve. Indeed, in that case, avoiding the overhead of computing Q or R should be the most beneficial.

Jitse

**Follow-Ups**:**Re: [eigen] GivensQR***From:*Benoit Jacob

**References**:**[eigen] GivensQR***From:*Andrea Arteaga

**Re: [eigen] GivensQR***From:*Benoit Jacob

**Re: [eigen] GivensQR***From:*Benoit Jacob

**Re: [eigen] GivensQR***From:*Andrea Arteaga

**Re: [eigen] GivensQR***From:*Benoit Jacob

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