g++ [flags ...] file ... -l /isip/tools/lib/$ISIP_BINARY/lib_math_matrix.a

#include <MatrixLong.h>

MatrixLong(long nrows = DEF_SIZE, long ncols = DEF_SIZE,
           long type = DEF_TYPE);
MatrixLong(const MatrixLong& matrix);

long data0[6] = {1, 2, 3, 4, 5, 6};
long data1[6] = {4, 6, 7, 2, 3, 9};

MatrixLong val0;
MatrixLong val1(3, 3, Integral::LOWER_TRIANGLE);
val0.assign(2, 3, data0);
val1.assign(3, 3, data1);

• none

• This example demonstrates basic linear algebra operations using the matrix class
  by solving the equation: w = x^Tyx - z.

         
  // declare the operands: note that these matrices are of different types.
  // the class will handle type conversion automatically.
  //
  MatrixLong x;
  x.assign(3, 3, L"1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0", Integral::FULL);
   
  MatrixLong y;
  y.assign(3, 3, L"3.0, 2.0, 1.0", Integral::DIAGONAL);
    
  MatrixLong z;
  z.setDimensions(3, 3);
  z.setValue(1, 2, 1.0);
         
  // declare an output matrix: not that we don't need to declare the size
  // of this matrix.
  //
  MatrixLong w;
    
  // compute a matrix transpose and put into a new matrix
  //
  MatrixLong x_t;       
  x_t.transpose(x);
    
  // compute the product of y and x, and multiply the result with the transpose of x, then subtract z
  //
  y.mult(x)       
  x_t.mult(y);       
  w.sub(x_t, z);
  
  // print the output
  //
  w.debug(L"the answer is");
  

  The output that results from this example is:
  
  

      [ 84 102 120  ]
  w = [ 102 126 149 ]
      [ 120 150 180 ]