syms y(t) r 2 V odeToVectorField(diff(y, 2)+ 0.5*diff(y, 1)- y^3+y^5 r*cos(t)) M matlabFunction(V, vars , { t , Y }) sol ode45(M,[0 20],[2 0]) x linspace(0,20,100) y1 d (sol,x,1) y2 d (sol,x,2) plot(x,y1, r- ,x,y2, b: ) legend( y1 , y2 ) xlabel( 时间 ) ylabel( y ) grid on

matlab.mat
Untitled2.m
分叉源代码.txt

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