Re: [Boost-users] [uBLAS] Matrix inversion

Subject: Re: [Boost-users] [uBLAS] Matrix inversion
From: Bo Jensen (jensen.bo_at_[hidden])
Date: 2011-03-02 14:06:38

On Wed, Mar 2, 2011 at 7:52 PM, Curtis Gehman <curtis2006_at_[hidden]> wrote:
> I'm not a uBLAS developer, but I suspect that it isn't included simply
> because matrix inversion is not a common problem in practice.  More common
> is solving a linear system.  Computing the matrix inverse to solve a linear
> system is probably the worst way to solve it.

Agree. I also noted about the headline in :

http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?LU_Matrix_Inversion

LU is a factorization of the matrix not a inverse...in real life
inverting the matrix is only for small examples.

>
>
> On Mar 02, 2011, at 05:08 AM, Ryan <mccorywork_at_[hidden]> wrote:
>
> sguazt wrote:
>> Hi,
>>
>> take a look here:
>>
>> http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?Effective_UBLAS
>>
> This is the matrix inversion that I've tried. It is lacking in checks
> and at that point I wanted to know if there was an inversion built into
> uBLAS. If there was an inversion built in then it would have the normal
> quality checks that I've come to expect from Boost.
>
> Was there a reason that an inversion method wasn't included in the uBLAS
> library? It seems a pretty basic matrix manipulation. Is there a
> complexity I'm not familiar with that would prohibit it's implementation?
>
> Ryan
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