Re: [Boost-users] Problem with "prod" function

Subject: Re: [Boost-users] Problem with "prod" function
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2010-05-16 10:26:48

AMDG

gicatena_at_[hidden] wrote:
> The following code is not working for me:
> ---------------------------------------
> using namespace boost::numeric::ublas;
> 	matrix<double> m (3, 3);
> 	matrix<double> o (3, 3);
> 	for (unsigned i = 0; i < m.size1 (); ++ i)
> 		for (unsigned j = 0; j < m.size2 (); ++ j)
> 		{
> 			m (i, j) = 3 * i + j;
> 			o (i, j) = 3 * i + j;
> 		}
> 	std::cout << m << o << std::endl;
> 	
> 	matrix_vector_binary2< matrix_row< matrix<double> >, matrix<double>, double > 
> D;
>   

Use the correct function object instead of double as the last argument.

> 	D = prod(row(m, 1),o);
> ---------------------------------------
>
> the error is
>
> 1>c:\program files (x86)
> \boost\boost_1_42\boost\numeric\ublas\matrix_expression.hpp(3809) : error 
> C2825: 'F': must be a class or namespace when followed by '::'
> 1>        c:\users\alex\desktop\testngage\testngage\testngage.cpp(21) : see 
> reference to class template instantiation 'boost::numeric::ublas::
> matrix_vector_binary2<E1,E2,F>' being compiled
> 1>        with
> 1>        [
> 1>            E1=boost::numeric::ublas::matrix_row<boost::numeric::ublas::
> matrix<double>>,
> 1>            E2=boost::numeric::ublas::matrix<double>,
> 1>            F=double
> 1>        ]
> <snip>
>
> where am I getting wrong?
>   

In Christ,
Steven Watanabe