Mathc matrices/048

Étude du code

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	c00a.c

/* ------------------------------------ */
/*  Save as :   c00a.c                  */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
#define   RCA    RC4
/* ------------------------------------ */
#define    EV    R1  
/* ------------------------------------ */
int main(void)
{
double a[RCA*RCA]={
+9.387051138013, +1.478424899325, +0.973685336456, -0.700350180421, 
+1.478424899325, +9.614194406175, +0.773429774749, -1.033063523876, 
+0.973685336456, +0.773429774749, +10.505111304292, +1.482769644746, 
-0.700350180421, -1.033063523876, +1.482769644746, +10.493643151520     
};

double **A        = ca_A_mR(a, i_mR(RCA,RCA));
double **EValue   = eigs_mR(A, i_mR(RCA,RCA));

double **Ide      =  eye_mR(   i_mR(RCA,RCA));
double **sIde     =            i_mR(RCA,RCA);
double **AmnssIde =            i_mR(RCA,RCA);

double **Ab       =            i_Abr_Ac_bc_mR(RCA,RCA,C1);
double **b        =            i_mR(RCA,C1);
double **Ab_free  =            i_Abr_Ac_bc_mR(RCA,RCA,RCA);
double **b_free   =            i_mR(RCA,RCA);

double **V        =            i_mR(RCA,RCA);

  clrscrn();
  printf(" A :");
  p_mR(A,S10,P5,C10);
  
         smul_mR(EValue[EV][C1],Ide,sIde);          
          sub_mR(A,sIde,AmnssIde);
        
     c_A_b_Ab_mR(AmnssIde,b,Ab); 
        gj_PP_mR(Ab,NO);  
    put_zeroR_mR(Ab,Ab_free);
    put_freeV_mR(Ab_free); 
        gj_PP_mR(Ab_free,YES);      
       c_Ab_b_mR(Ab_free,b_free);

          c_c_mR(b_free,C2,V,EV); 
          c_c_mR(b_free,C3,V,EV+C1);  
                    
    Normalize_mR(V);
           
          printf(" V%d : Copy V%d into the last file",EV,EV);
          P_mR(V,S10,P12,C10);  
           
  stop();
             
  f_mR(A);
  f_mR(EValue);
  
  f_mR(Ide);
  f_mR(sIde);
  f_mR(AmnssIde);
  
  f_mR(Ab);
  f_mR(b);
  f_mR(Ab_free);    
  f_mR(b_free);
  
  f_mR(V); 
  
  return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */

Calculer les deux premiers vecteurs propres

Exemple de sortie écran :

 A :
  +9.38705   +1.47842   +0.97369   -0.70035 
  +1.47842   +9.61419   +0.77343   -1.03306 
  +0.97369   +0.77343  +10.50511   +1.48277 
  -0.70035   -1.03306   +1.48277  +10.49364 

 V1 : Copy V1 into the last file
+0.545516920109, -0.502145306797,       -nan,       -nan, 
+0.544568195031, -0.586388346015,       -nan,       -nan, 
+0.637068890180, +0.000000000000,       -nan,       -nan, 
+0.000000000000, +0.635608998142,       -nan,       -nan  

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