[Boost-users] Re: ublas and matrix expression

From: Russell Hind (rhind_at_[hidden])
Date: 2004-04-08 09:37:59

Angus Leeming wrote:

> Russell Hind wrote:
> 
>>Don't know what MTL is.  I have a look.  Thanks
> 
> 
> Matrix Template Library. Jeremy Siek's master's thesis.
> 

I've found the link.  I'll see if I have any luck with that

> 
>>X is typically ~500 by 5 (don't know if that counts as big or not,
>>last time I did matrix work, we only used 3x3 and 4x4 so to me it
>>seems pretty huge, but we were doing stuff by hand).
> 
> 
> It isn't too terrible, but to invert it it must be square...
> 

Well, the bit I need to invert is

prod(trans(X), X) so X is 500 x 5.  Is this possible?

Thanks

Russell