Example Codes of Matrix IO

dgematrix IO

//=============================================================================
#include <iostream>
#include <cstdlib>
#include <ctime>
#include "cpplapack.h"

//=============================================================================
/*! main */
int main(int argc, char** argv)
{
  srand(unsigned(time(NULL)));
  int M(4), N(3);
  
  //// make dgematrix A ////
  CPPL::dgematrix A(M,N);
  for(int i=0; i<A.m; i++){ for(int j=0; j<A.n; j++){
    A(i,j) =double( rand() /(RAND_MAX/10) );
  }}
  
  //// print A in two ways ////
  std::cout << "A =\n" << A << std::endl;
  for(int i=0; i<A.m; i++){ for(int j=0; j<A.n; j++){
    std::cout << "A(" << i << "," << j << ") =" << A(i,j) << std::endl;
  }}
  
  //// make A 10 times ////
  std::cout << "#### A*=10.; ####" << std::endl;
  A*=10.;
  
  //// make dgematrix B ////
  CPPL::dgematrix B(A);
  std::cout << "B =\n" << B << std::endl;
  for(int i=0; i<B.m; i++){ for(int j=0; j<B.n; j++){
    std::cout << "B(" << i << "," << j << ") =" << B(i,j) << std::endl;
  }}
  
  //// print A+B ////
  std::cout << "A+B=\n" << A+B << std::endl;
  
  //// write/read ////
  std::cout << "writeing B into tmp.txt" << std::endl;
  B.write( "tmp.txt" );
  CPPL::dgematrix C;
  std::cout << "reading tmp.txt into C" << std::endl;
  C.read( "tmp.txt" );
  std::cout << "C-B =\n" << C-B << "<-Should be zero." << std::endl;
  
  
  //// const ////
  const CPPL::dgematrix X( CPPL::dgematrix(2,2)
                           .set(0,0,1).set(0,1,2).set(1,0,3).set(1,1,4) );
  std::cout << "X=\n" << X << std::endl;
  
  return 0;
}

dgbmatrix IO

/*****************************************************************************/
/*                                 noname                                    */
/*****************************************************************************/

//=============================================================================
#include <iostream>
#include <cstdlib>
#include <ctime>
#include "cpplapack.h"
using namespace std;

//=============================================================================
/*! main */
int main(int argc, char** argv)
{
  srand(unsigned(time(NULL)));
  //int M(5), N(4), KL(2), KU(1);
  int M(10), N(10), KL(1), KU(1);
  
  CPPL::dgbmatrix A(M,N,KL,KU);
  for(int i=0; i<A.m; i++){ for(int j=0; j<A.n; j++){
    //if(!( i-j>A.kl || j-i>A.ku )){ A(i,j) =double( rand() /(RAND_MAX/10) ); }
    if(!( i-j>A.kl || j-i>A.ku )){ A(i,j) =10.*double(i)+double(j); }
  }}
  
  cout << "A =\n" << A << endl;
  for(int i=0; i<A.m; i++){ for(int j=0; j<A.n; j++){
    if(!( i-j>A.kl || j-i>A.ku )){
      cout << "A(" << i << "," << j << ") =" << A(i,j) << endl;
    }
  }}
  
  
  
  const CPPL::dgbmatrix B(A);
  cout << "B =\n" << B << endl;
  
  //B*=10.; //compile error
  //B(0,0)=0.; //compile error
  
  //cout << "A+B=\n" << A+B << endl;
  
  //// write/read ////
  B.write( "tmp.txt" );
  CPPL::dgbmatrix C;
  C.read( "tmp.txt" );
  cout << "C-B =\n" << C-B << "<-Should be zero." << endl;

  return 0;
}

/*****************************************************************************/

dsymatrix IO

//=============================================================================
#include <iostream>
#include <cstdlib>
#include <ctime>
#include "cpplapack.h"
using namespace std;

//=============================================================================
/*! main */
int main(int argc, char** argv)
{
  srand(unsigned(time(NULL)));
  int N(3);
  
  //// make dgematrix A ////
  CPPL::dsymatrix A(N);
  for(int i=0; i<A.n; i++){
    for(int j=0; j<=i; j++){
      A(i,j) =double( rand() /(RAND_MAX/10) );
    }
  }
  
  //// print A in two ways ////
  cout << "A =\n" << A << endl;
  for(int i=0; i<A.n; i++){
    for(int j=0; j<A.n; j++){
      cout << "A(" << i << "," << j << ") =" << A(i,j) << endl;
    }
  }
  
  A.complete();
  for(int i=0; i<A.n; i++){ 
    for(int j=0; j<=i; j++){
      cout << A.array[i+A.n*j] << ' ';
    }
    cout << endl;
  }
  
  //// make A 10 times ////
  cout << "#### A*=10.; ####" << endl;
  A*=10.;
  
  //// make dgematrix B ////
  CPPL::dsymatrix B(A);
  cout << "B =\n" << B << endl;
  for(int i=0; i<B.n; i++){
    for(int j=0; j<B.n; j++){
      cout << "B(" << i << "," << j << ") =" << B(i,j) << endl;
    }
  }
  
  //// print A+B ////
  cout << "A+B=\n" << A+B << endl;
  
  //// write/read ////
  B.write( "tmp.txt" );
  CPPL::dsymatrix C;
  C.read( "tmp.txt" );
  cout << "C-B =\n" << C-B << "<-Should be zero." << endl;
  
  return 0;
}