Linear Algebra and the C Language/a0bq


Install and compile this file in your working directory. 

/* ------------------------------------ */
/*  Save as :   c00a.c                  */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
void fun(int r)
{
double **Q = r_Q_mR(i_mR(r,r), 9);

  clrscrn();
    
  printf(" Q :      An orthonormal matrix\n\n"
         "          det(Q) = 1 or -1\n\n");
  p_mR(Q,S3,P3,C6);
  
  printf(" det(Q) = %.0f\n\n",det_R(Q));   
  
  f_mR(Q);
}
/* ------------------------------------ */
int main(void)
{
time_t t;

  srand(time(&t));

do
{
  fun(rp_I(R3)+R2);

} while(stop_w());

  return 0;
}

/* ------------------------------------ */
/* ------------------------------------ */


Screen output example: 

                                                                                       
 Q :      An orthonormal matrix

          det(Q) = 1 or -1


-0.593 -0.431 +0.364 +0.575 
+0.074 -0.497 +0.566 -0.654 
+0.445 +0.433 +0.709 +0.335 
+0.667 -0.617 -0.212 +0.360 

 det(Q) = 1


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