MATLAB实现部分分式展开式1. 用部分分式法求F（s）的逆变换 format rat num=1 2; den=1 4 3 0; r,p=residue(num,den)r = -1/6 -1/2 2/3 p = -3 -1 0 2. 用部分分式法求F（s）的逆变换 num=1 -2; a=conv(1 0,1 1);b=conv(1 1,1 1); den=conv(a,b); r,p=residue(num,den) r = 2 2 3 -2 p = -1 -1 -1 0 Or num=1 -2; den=poly(0 -1 -1 -1); r,p=residue(num,den)r = 2 2 3 -2 p = -1 -1 -1 0 3. 用部分分式法求F（s）的逆变换 num=2 3 0 5; den=conv(1 1,1 1 2); r,p,k=residue(num,den)r = -2 + 2024/1785i -2 - 2024/1785i 3 p = -1/2 + 1012/765i -1/2 - 1012/765i -1 k = 2 Or num=2 3 0 5; den=conv(1 1,1 1 2); r,p,k=residue(num,den); angle,mag=cart2pol(real(r),imag(r)angle = 1972/751 -1972/751 0 mag = 7895/3434 7895/3434 3