[Boost-users] Re: ublas and matrix expression

From: Russell Hind (rhind_at_[hidden])
Date: 2004-04-08 09:16:37

Angus Leeming wrote:
> 
> Correct. Note that X is modified by the call to lu_factorize and y is 
> modified by the call to lu_substitute.
> 

Thanks.  Unfortunately I'm stuck with boost-1.30.2 and it doesn't have 
lu_* in it.  I have lu.hpp but I get compile errors with bcc-5.6.4 in 
lu.hpp hence why I wondered if there was a way to do it using ublas, but 
not lu_*.

>>
>>If not, is there another way of solving this without using lu_*?
> 
> 
> Sure. Use the matrix solution method of your choice. Does the MTL not 
> interoperate with uBlas?
> 

Don't know what MTL is.  I have a look.  Thanks

> Well, if matrix X isn't too big, then the lu_ methods are just 
> what you need.
> 

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).

I'll have to have a look around for another library if there is no way 
to do it with ublas without using lu_*.

Thanks for your help

Russell