Re: [ublas] bug with boost::rational types

From: Leopoldo Peralta (lperalta_at_[hidden])
Date: 2007-07-18 11:02:45

When using uBlas object with boost::rational types, the program fails to
compile throwing this error (MS Visual Studio 2003, SP1)

c:\boost_1_34_0_beta\boost_1_34_0\boost\numeric\ublas\traits.hpp(89): error
C2665: 'abs' : none of the 5 overloads can convert parameter 1 from type
'const ratio'

This code shows the bug:

        typedef boost::rational<int> ratio;

        vector<ratio> r(2);
        r[0] = ratio(2,3);
        r[1] = ratio(2,7);

        ratio dNorm = index_norm_inf(r);	<-- Error Line

Any suggestion to fix it?

Thanks,

Leopoldo Peralta

-----Mensaje original-----
De: ublas-bounces_at_[hidden] [mailto:ublas-bounces_at_[hidden]] En
nombre de Gunter Winkler
Enviado el: Sunday, July 15, 2007 3:04 PM
Para: ublas mailing list
Asunto: Re: [ublas] vector of vector adaptors

Sorkin Dima schrieb:
> Hi.
>   Ublas defines and can work with "vector of vector adaptors"
> as matrices. Does somebody have a quick hint where are they defined
> and is there some documentation ?
>   
see (surprise!) vector_of_vector.hpp

I'd suggest

generalized_vector_of_vector< double, row_major, vector< 
compressed_vector<double> > >

mfg
Gunter

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