Technical facts

Application type(s)

Desktop application

Operating system(s) or programming environment(s)

Lubuntu 12.10 (quantal)

IDE(s):

Qt Creator 2.5.2

Project type:

Console application

C++ standard:

C++98

Compiler(s):

G++ 4.7.2

Libraries used:

STL: GNU ISO C++ Library, version 4.7.2

Qt project file: CppUblasMatrixExample2.pro


TEMPLATE = app


CONFIG += console


CONFIG -= qt


SOURCES += main.cpp

main.cpp


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








const boost::numeric::ublas::matrix<int> CreateMatrix(const int n_cols, const int n_rows)


{


  boost::numeric::ublas::matrix<int> m(n_rows,n_cols); //y-x-ordered


  for (int y = 0; y != n_rows; ++y)


  {


    for (int x = 0; x != n_cols; ++x)


    {


      m(y,x) = (y * 10) + x;


    }


  }


  return m;


}





int main()


{


  const int n_cols = 3;


  const int n_rows = 2;


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





  //boost::numeric::ublas::matrix is y-x-ordered


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


  assert(m(1,0) == 10); assert(m(1,1) == 11); assert(m(1,2) == 12);





  //Transpose


  const boost::numeric::ublas::matrix<int> n = boost::numeric::ublas::trans(m);


  assert(n(0,0) ==  0); assert(n(0,1) == 10);


  assert(n(1,0) ==  1); assert(n(1,1) == 11);


  assert(n(2,0) ==  2); assert(n(2,1) == 12);


}

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(C++) boost::numeric::ublas::matrix example 2: transposition

Technical facts

Qt project file: CppUblasMatrixExample2.pro

main.cpp