Re: [Boost-users] assigning a value to a matrix shared_ptr

Subject: Re: [Boost-users] assigning a value to a matrix shared_ptr
From: Max S. Kaznady (max.kaznady_at_[hidden])
Date: 2010-07-27 21:15:43

I guess this works too:
for (unsigned i = 0; i < m2->size1(); ++i)
    for (unsigned j = 0; j < m2->size2(); ++j)
      (*m2)(i, j) = 3 * i + j;

std::cout<<*m2<<std::endl;

Cheers,
Max

On Tue, Jul 27, 2010 at 9:12 PM, Max S. Kaznady <max.kaznady_at_[hidden]> wrote:
> This is the best that I could come up with:
> for (unsigned i = 0; i < m2->size1(); ++i)
>    for (unsigned j = 0; j < m2->size2(); ++j)
>      m2->insert_element(i, j, 3 * i + j);
> std::cout<<m2.operator *()<<std::endl;
>
> Is there a more elegant solution?
>
> Cheers,
> Max
>
> On Tue, Jul 27, 2010 at 8:40 PM, Max S. Kaznady <max.kaznady_at_[hidden]> wrote:
>> Hello,
>>
>> I am trying to assign a value to the matrix, which is pointed to by
>> the shared pointer, but I am not sure which operator to call, please
>> have a look at the following code, I commented the problem:
>>
>> #include <boost/numeric/ublas/matrix.hpp>
>> #include <boost/numeric/ublas/io.hpp>
>>
>> int main () {
>>    using namespace boost::numeric::ublas;
>>    matrix<double> m (3, 3);
>>    boost::shared_ptr<matrix<double>> m2(new matrix<double>(3,3));
>>    for (unsigned i = 0; i < m.size1 (); ++ i)
>>        for (unsigned j = 0; j < m.size2 (); ++ j) {
>>            m (i, j) = 3 * i + j;
>>            /// now do the same operation to the shared pointer's matrix
>>            m2->operator*(i, j) = 3 * i + j; // this results in a runtime error
>>    }
>>    std::cout << m << std::endl;
>>    // And how do we print m2 ?
>> }
>>
>> Thanks,
>> Max
>>
>