Mathc matrices/c12b1

Application

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	ccn1.c

/* ------------------------------------ */
/*  Save as :   ccn1.c                  */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
/* ------------------------------------ */
void fun(int r,int c)
{
double **A     = r_mR(i_mR(r,c),9.);
double **A_T   =      i_mR(c,r);

double **S = i_mR(r,C1);
double **U = i_mR(r,r);
double **V = i_mR(c,c);

  clrscrn();  
  printf(" Copy/Past into the octave windows \n\n\n");
  p_Octave_mR(A,"A",P2);
  printf(" [U, S, V] =svd (A,10)\n\n\n");
  stop();

  clrscrn(); 
  
  transpose_mR(A,A_T);
   
  svd_U_Cn_mR(A,U); 
  svd_V_Cn_mR(A,V); 
  svds_mR(A_T,S);
  
  printf(" U :");
  p_mR(U,S5,P5,C10);   
    
  printf(" S :");
  p_mR(S,S5,P5,C10);
   
  printf(" V:");
  p_mR(V,S5,P5,C10);  
    
  f_mR(A);
  f_mR(A_T); 
  f_mR(S); 
  f_mR(U);
  f_mR(V); 
}
/* ------------------------------------ */
int main(void)
{
time_t t;

  srand(time(&t));

int i;

do
{
  i = rp_I(R3)+R1;
  
  fun(i,i+C1);

} while(stop_w());

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

La dernière colonne de V ne corresponde pas à celle donnée par octave.

Exemple de sortie écran :

 ------------------------------------ 
 Copy/Past into the octave windows 


 A=[
+6.00,+8.00,-5.00,+2.00,-3.00,-3.00;
-1.00,+2.00,-1.00,-5.00,-3.00,+8.00;
-7.00,+4.00,-9.00,-1.00,-1.00,-5.00;
-9.00,+2.00,-1.00,+8.00,+2.00,-7.00]

 [U, S, V] =svd (A,10)


 Press return to continue. 


 ------------------------------------ 
 U :
+0.17623 +0.77787 +0.54837 +0.25131 
-0.31937 +0.32075 -0.63789 +0.62307 
+0.58008 +0.39853 -0.54043 -0.46111 
+0.72832 -0.36498 +0.01802 +0.57966 

 S :
+18.02032 
+13.03627 
+10.40699 
+4.90081 

 V:
+0.51268 +0.37139 +0.72536 -0.22536 +0.13495 +0.07770 
-0.25238 +0.59285 +0.09470 +0.52471 -0.45217 +0.26060 
+0.36130 -0.57010 +0.26346 +0.34498 -0.58245 -0.19020 
-0.39932 -0.25823 +0.47764 +0.50719 +0.53411 -0.00000 
-0.07247 -0.33939 +0.08120 -0.20460 +0.00000 +0.90658 
+0.61499 +0.06095 -0.40091 +0.50574 +0.39092 +0.26075 


 Press return to continue
 Press X      to stop