
Boost Users : 
Subject: Re: [Boostusers] assigning a value to a matrix shared_ptr
From: Max S. Kaznady (max.kaznady_at_[hidden])
Date: 20100727 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
>>
>
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