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Scilab manual >> Polynomials > residu

residu

残差

呼び出し手順

[V]=residu(P,Q1,Q2)

パラメータ

P, Q1, Q2

実数または複素数の係数を有する多項式または多項式の行列.

説明

V=residu(P,Q1,Q2) は, V(i,j)Q1(i,j)のゼロで計算される 有理数P(i,j)/(Q1(i,j)*Q2(i,j)) の残差の合計となるような行列Vを返します.

Q1(i,j) および Q2(i,j) は, 共通の根を有さない必要があります.

s=poly(0,'s');
H=[s/(s+1)^2,1/(s+2)];N=numer(H);D=denom(H);
w=residu(N.*horner(N,-s),D,horner(D,-s));  //N(s) N(-s) / D(s) D(-s)
sqrt(sum(w))  //H2ノルムです
h2norm(tf2ss(H))

p=(s-1)*(s+1)*(s+2)*(s+10);a=(s-5)*(s-1)*(s*s)*((s+1/2)**2);
b=(s-3)*(s+2/5)*(s+3);
residu(p,a,b)+531863/4410    //正確
z=poly(0,'z');a=z^3+0.7*z^2+0.5*z-0.3;b=z^3+0.3*z^2+0.2*z+0.1;
atild=gtild(a,'d');btild=gtild(b,'d');
residu(b*btild,z*a,atild)-2.9488038   //正確
a=a+0*%i;b=b+0*%i;
real(residu(b*btild,z*a,atild)-2.9488038) //複素数の場合

作者

F.Delebecque INRIA

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Last updated:
Wed Jan 26 16:25:08 CET 2011