Mathc matrices/c24n

Un livre de Wikilivres.


Application


Installer et compiler ces fichiers dans votre répertoire de travail.


c02c.c
/* ------------------------------------ */
/*  Save as :  c02c.c                   */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
/* ------------------------------------ */
#define   RA R2
#define   CA C2

#define   RX R2
#define   CX C1
/* ------------------------------------ */
/* ------------------------------------ */
int main(void)
{
double a[RA*CA]={
    +3, -2,  
    +2, -2
};

double x_B[RX*CX]={
    +1,   
    +2
};

double b[RA*CA]={
    +2, +4,   
    +3, +5
};

double **A   = ca_A_mR(a, i_mR(RA,CA));
double **B   = ca_A_mR(b, i_mR(RA,CA));

double **X_B = ca_A_mR(x_B,  i_mR(RX,CX));

double **invB  =  inv_mR(B, i_mR(RA,CA));
double **invBA =            i_mR(RA,CA);
double **D     =            i_mR(RA,CA);
double **DX_B  =            i_mR(RA,CX);

  clrscrn();
  printf(" In the the B basis\n\n"
         " Find [T(x)]_B = D*x_B \n\n"
         " D =  InvB*A*B ");
  mul_mR(invB,A,invBA);       
  mul_mR(invBA,B,D);
  p_mR(D,S4,P2,C7); 
  printf(" x_B : ");
  p_mR(X_B,S4,P2,C7);
  printf(" D*x_B");
  p_mR(mul_mR(D,X_B,DX_B),S4,P2,C7);
  stop();   

  f_mR(A);
  f_mR(X_B);
  
  f_mR(B);
  f_mR(invB);  
  f_mR(invBA);  
  f_mR(D);
  f_mR(DX_B);
    
  return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */


 Calculons  [T(x)]_B = D* [x]_B


Exemple de sortie écran :
 ------------------------------------ 
 In the the B basis

 Find [T(x)]_B = D*x_B 

 D =  InvB*A*B   
-4.00 -9.00 
+2.00 +5.00 

 x_B : 
+1.00 
+2.00 

 D*x_B
-22.00 
+12.00 

 Press return to continue.