Technical facts

Operating system(s) or programming environment(s)

Lubuntu 15.04 (vivid)

IDE(s):

Qt Creator 3.1.1

Project type:

Console application

C++ standard:

C++98

Compiler(s):

G++ 4.9.2

Libraries used:

STL: GNU ISO C++ Library, version 4.9.2

Qt project file: ./CppUblasMatrixExample1/CppUblasMatrixExample1.pro


TEMPLATE = app

CONFIG += console

CONFIG -= qt

SOURCES += main.cpp

./CppUblasMatrixExample1/main.cpp


#include <iostream>

#include <boost/numeric/ublas/matrix.hpp>

#include <boost/numeric/ublas/io.hpp>



int main()

{

  const int n_cols = 2;

  const int n_rows = 3;

  {

    boost::numeric::ublas::matrix<int> m(n_rows,n_cols);

    assert(n_rows == static_cast<int>(m.size1()));

    assert(n_cols == static_cast<int>(m.size2()));

    for (int y = 0; y != n_rows; ++y)

    {

      for (int x = 0; x != n_cols; ++x)

      {

        m(y,x) = (y * 10) + x;

      }

    }

    std::cout << m << std::endl;

    assert(m(0,0) ==  0); assert(m(0,1) ==  1);

    assert(m(1,0) == 10); assert(m(1,1) == 11);

    assert(m(2,0) == 20); assert(m(2,1) == 21);

  }

  {

    boost::numeric::ublas::matrix<int,boost::numeric::ublas::column_major> m(n_cols,n_rows);

    assert(n_cols == static_cast<int>(m.size1()));

    assert(n_rows == static_cast<int>(m.size2()));

    for (int x = 0; x != n_cols; ++x)

    {

      for (int y = 0; y != n_rows; ++y)

      {

        m(x,y) = (y * 10) + x;

      }

    }

    std::cout << m << std::endl;

    assert(m(0,0) ==  0); assert(m(1,0) ==  1);

    assert(m(0,1) == 10); assert(m(1,1) == 11);

    assert(m(0,2) == 20); assert(m(1,2) == 21);

  }

}



/*



[3,2]((0,1),(10,11),(20,21))

[2,3]((0,10,20),(1,11,21))



*/

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(C++) UblasMatrixExample1

Technical facts

Qt project file: ./CppUblasMatrixExample1/CppUblasMatrixExample1.pro

./CppUblasMatrixExample1/main.cpp