function dxdt=weifenequation(t,x)a1=-22.5000;a2=18;b1=0.1588;b2=0.0623;c1=7.0285;c2=2.8463;dxdt=zeros(5,1);dxdt(1)=a1+b1*(x(2)-x(1));dxdt(2)=c1*(x(1)-x(2))+c2*(x(3)-x(2));dxdt(3)=a2+b2*(x(2)+x(4)-2*x(3));dxdt(4)=c1*(x(5)-x(4))+c2*(x(3)-x(4));dxdt(5)=a1+b1*(x(4)-x(5));%以上保存在weifenequation.m文件[t,x]=ode4