Mathc matrices/042

Étude du code

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	c00a.c

/* ------------------------------------ */
/*  Save as :   c00a.c                  */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */     
#define RCA          RC3  
/* ------------------------------------ */       
/* ------------------------------------ */
void fun(void)
{                          
double a[RCA*RCA]={
+8.146673651126, +0.924044002095,  +1.085385018334, 
+0.924044002095, +13.821477213201, +6.837925615505, 
+1.085385018334, +6.837925615506,  +16.031849135673      
};

double v[RCA*RCA]={
+0.102355700213, -0.987635528464, -0.990992430410, 
+0.644840911344, +0.156767544201, +0.000000000000, 
+0.757432181579,  +0.000000000000, +0.133917896001     
};
                        
double **A      =  ca_A_mR(a, i_mR(RCA,RCA));
double **V      =  ca_A_mR(v, i_mR(RCA,RCA));
double **invV   = invgj_mR(V, i_mR(RCA,RCA));
double **EValue =  eigs_mR(A, i_mR(RCA, RCA));

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

  clrscrn(); 
  printf(" A :");
  p_mR(A, S8,P5, C4);     

  printf(" V :");
  p_mR(V, S9,P5, C4); 
 
  printf(" EValue = invV * A * V");
  mul_mR(invV,A,T);
  mul_mR(T,V,EValue);
  p_mR(clean_eye_mR(EValue), S9,P5, C4);  
         
  printf(" A = V * EValue * invV");
  mul_mR(V,EValue,T);
  mul_mR(T,invV,A); 
  p_mR(A, S8,P5, C4);
  stop();
              
  f_mR(A);
  f_mR(V);  
  f_mR(invV);  
  f_mR(T);  
  f_mR(EValue);
}
/* ------------------------------------ */
int main(void)
{
    fun();
    
  return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */

Vérifier les calculs

Exemple de sortie écran :

 A :
+8.14667 +0.92404 +1.08539 
+0.92404 +13.82148 +6.83793 
+1.08539 +6.83793 +16.03185 

 V :
 +0.10236  -0.98764  -0.99099 
 +0.64484  +0.15677  +0.00000 
 +0.75743  +0.00000  +0.13392 

 EValue = invV * A * V
+22.00000  +0.00000  +0.00000 
 +0.00000  +8.00000  +0.00000 
 +0.00000  +0.00000  +8.00000 

 A = V * EValue * invV
+8.14667 +0.92404 +1.08539 
+0.92404 +13.82148 +6.83793 
+1.08539 +6.83793 +16.03185 

 Press return to continue.