Question

求教如何用matlab编写这个微分方程的程序

还有采用的算法是什么

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Answer 1

采用Runge-Kutta法：
syms x(t)
[V,Y] = odeToVectorField(4*diff(x,2)==(3*x-2*x^2)*diff(x)-4*x);
M = matlabFunction(V,'vars', {'t','Y'});
sol = ode45(M,[0 100],[2,0]);
x1 = linspace(0,100,1000);
y = deval(sol,x1,1:2);
plot(x1,y);
grid on
legend('x','x''')