Scilab-Branch-6.1-GIT
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See the recommended documentation of this function
invr
inverse une matrice de polynômes ou de fractions rationelles
Séquence d'appel
F = invr(H)
Paramètres
- H
- matrice de polynômes ou de quotients polynomiaux (fractions rationelles).
- F
- matrice de fractions rationelles
Description
invr calcule H-1
selon l'algorithme de Leverrier (voir code de la fonction).
Exemples
s = %s; H = [s, s*s+2 ; 1-s, 1+s], iH = invr(H), H * iH [Num,den] = coffg(H); Num/den H = [1/s, (s+1) ; 1/(s+2), (s+3)/s]; invr(H)
--> H = [s, s*s+2 ; 1-s, 1+s], iH = invr(H), H * iH
H =
s 2 +s²
1 -s 1 +s
iH =
1 +s -2 -s²
---------- ----------
-2 +3s +s³ -2 +3s +s³
-1 +s s
---------- ----------
-2 +3s +s³ -2 +3s +s³
ans =
1 0
- -
1 1
0 1
- -
1 1
--> [Num,den] = coffg(H); Num/den
ans =
1 +s -2 -s²
---------- ----------
-2 +3s +s³ -2 +3s +s³
-1 +s s
---------- ----------
-2 +3s +s³ -2 +3s +s³
Voir aussi
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