Mathc matrices/c12an3

Application

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	cgn0e.c

/* ------------------------------------ */
/*  Save as :   cgn0e.c                 */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
/* ------------------------------------ */
void fun(int r,int c)
{
double **B       = r_mR(i_mR(c,r),9.);
double **B_T     = transpose_mR(B,i_mR(r,c));

double **U_TB    = i_mR(r,r);    /* rc cr   */

double **U       = i_mR(c,r);
double **V       = i_mR(r,r);
double **V_T     = i_mR(r,r);

double **S       = i_mR(r,r);
double **U_T     = i_mR(r,c);

double **US       = i_mR(c,r);  /* cr rr    */
double **B_2      = i_mR(c,r);  /* cr rr rr */

  clrscrn();    
  svd_U_Rn_mR(B_T,U);    
  svd_V_Rn_mR(B_T,V);  

 /* S = U_T * B * V */
  transpose_mR(U,U_T);
  mul_mR(U_T,B,U_TB);
  mul_mR(U_TB,V,S);

 /* B = U * S * V_T */
  transpose_mR(V,V_T);
  mul_mR(U,S,US);
  mul_mR(US,V_T,B_2);
  
  printf(" B :");
  p_mR(B ,S10,P3,C10); 
  printf(" B = U * S * V_T ");
  p_mR(B_2,S10,P3,C10);  
    
  f_mR(B);
  f_mR(B_T); 
  
  f_mR(U); 
  f_mR(V);
  
  f_mR(S);
  f_mR(US);
  
  f_mR(V_T);
  f_mR(U_T);
  
  f_mR(U_TB);
  f_mR(B_2);
}
/* ------------------------------------ */
int main(void)
{
time_t t;

  srand(time(&t));

int i;

do
{
  i = rp_I(R3)+R3;
  
  fun(i,i+R0);

} while(stop_w());

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

Exemple de sortie écran :

 ------------------------------------ 

 B :
    +2.000     +8.000     -3.000     +6.000 
    -7.000     +4.000     -3.000     -9.000 
    -9.000     +6.000     -3.000     -1.000 
    +4.000     -7.000     -1.000     -3.000 

 B = U * S * V_T 
    +2.000     +8.000     -3.000     +6.000 
    -7.000     +4.000     -3.000     -9.000 
    -9.000     +6.000     -3.000     -1.000 
    +4.000     -7.000     -1.000     -3.000 


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