ex4-4-1.m

matlab程序

% 符号矩阵的分解

syms s

G=[(s+1)/(s^2+5*s+6),2*(s+1)/(s^2+2*s-3);(s^2-s)/(s^2+2*s+1),s/(s+2)]

factor(G)


%  符号矩阵的展开

syms x y s a b c;

GS=[sin(x+y)/cos(2*x);exp(x-y);log(a*b^2/c);(s+1)*(s+3)/((s+2)*(s+4))]

expand(GS)


% 同幂项系数的合并

syms t;

S=a*sin(t)*x^2+b/t*sin(t)*x^2+cos(t)*x+sin(t)^2*x+log(b)*sin(t)^2

XS=collect(S)		%合并x的同幂系数

SS=collect(S,'sin(t)')	%合并sin(t)的同幂系数