Mathc matrices/03p

Étude du code

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	c00a.c

/* ------------------------------------ */
/*  Save as :   c00a.c                  */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */     
#define RCA          RC3  
#define EVALUE       RC1  
/* ------------------------------------ */       
/* ------------------------------------ */
void fun(void)
{                          
double a[RCA*RCA] ={   
+1.345288030, +1.760536858, -1.232763852, 
+1.760536858, +4.139646496, +0.479295438, 
-1.232763852, +0.479295438, +3.515065475    
};

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

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

double **Ab        = i_Abr_Ac_bc_mR(RCA,RCA,C1);
double **b         =          m0_mR( i_mR(RCA,C1));

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

  clrscrn(); 
  printf(" A :");
  p_mR(A, S8,P5, C3); 

          smul_mR(EigsValue[EVALUE][C1],Ide,sIde); 
         MmnsD_mR(A,sIde,AmnssIde);   
        
      c_A_b_Ab_mR(AmnssIde,b,Ab);
           
   GJ_PP_FreeV_mR(Ab,b_free);
  
           c_c_mR(b_free,C2,V,EVALUE);  

     Normalize_mR(V);
  
  printf(" V%d :",EVALUE);
  p_mR(V, S9,P5, C4); 
  printf("\n\n\n\n\n\n\n\n");  
  stop();
   
  f_mR(EigsValue);

  f_mR(Ab);
  f_mR(b);
  f_mR(b_free);
  
  f_mR(Ide);
  f_mR(sIde);
  f_mR(AmnssIde);   
}
/* ------------------------------------ */
int main(void)
{
    fun();
    
  return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */

Calculer un vecteur propre

Exemple de sortie écran :

 A :
+1.34529 +1.76054 -1.23276 
+1.76054 +4.13965 +0.47930 
-1.23276 +0.47930 +3.51507 

 V1 :
 +0.45779      -nan      -nan 
 +0.88400      -nan      -nan 
 -0.09471      -nan      -nan