Re: [Boost-Users] Problem with matrix_expressions

14 Nov 2002

      ----- Original Message ----- 
  From: Toon Knapen 
  To: Boost-Users@yahoogroups.com 
  Sent: Thursday, November 14, 2002 2:58 AM
  Subject: Re: [Boost-Users] Problem with matrix_expressions

  On Thursday 14 November 2002 02:51, agiatojon wrote:
...
Hello all,
I am trying to compile the following code snippet from the
documentation of matrix_expressions in which two matrices are used
to display the use of addition and subtraction operations.  I am not
really sure how to post the error messages as there are literally
hundreds of them, so here is the code as I am am pretty sure this is
going to be one of those well known bugs kind of things.  Compiled
using VS.NET, debug mode.
#include <iostream>
// include matrix.hpp instead of matrix_expression.hpp
  #include 

  // if you want to stream ublas matrices or vectors, also
  #include 
...
int main()
{
    using namespace boost::numeric::ublas;
matrix<double> m1(3, 3), m2(3, 3);
for(int i = 0; i < std::min(m1.size1(), m2.size1()); ++i)
        for(int j = 0; j < std::min(m1.size2(), m2.size2()); ++j)
            m1(i, j) = m2(i, j) = 3 * i + j;
std::cout << m1 + m2 << std::endl;
    std::cout << m1 - m2 << std::endl;
std::cin.get();
    return EXIT_SUCCESS;
}
With these two changes, it should work (at least on my linux box)

  Many thanks to Fresl and Knapen!  I will get the hang of this sooner or later.

  Jon Agiato
  JonAgiato@nyc.rr.com

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