Linear Algebra and the C Language/a0a4


Install and compile this file in your working directory. 

/* ------------------------------------ */
/*  Save as :   c00c.c                  */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
void fun(int r)
{
double **u    = r_mR(i_mR(r,C1),9.);
double **n_u  =      i_mR(r,C1);

  clrscrn();
  printf(" u :");
  p_mR(u,S3,P0,C6);
            
  smul_mR(1./norm_R(u),u,n_u);              
  printf("     n_u = (1/||u||) u :");
  p_mR(n_u,S3,P6,C6);            

  printf(" ||n_u|| = %.10f \n\n", norm_R(n_u));
            
  f_mR(u);
  f_mR(n_u);
}
/* ------------------------------------ */
int main(void)
{
time_t t;

  srand(time(&t));

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

} while(stop_w());

  return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */


Screen output example: 

                                                                                       
 u :
 +2 
 +4 
 +2 
 -5 

     n_u = (1/||u||) u :
+0.285714 
+0.571429 
+0.285714 
-0.714286 

 ||n_u|| = 1.0000000000 


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