这道matlab用ODE45怎么写?答:figure(1)plot(t,x),grid on legend('x1(t)','x2(t)','Location','northwest')xlabel('t'),ylabel({'x1(t)','x2(t)'})figure(2)plot(x(:,1),x(:,2)),grid on xlabel('x1(t)'),ylabel('x2(t)')title('x1(t) 与x2(t) 相平面图')运行结果 ...
急求matlab高手啊 解决几个微分方程 本人是一点不会 貌似不是很难 高手...答:X=4, Y=0.697564737441253 X=5, Y=0.8715574274765816 X=6, Y=1.0452846326765346 X=7, Y=1.2186934340514747 X=8, Y=1.3917310096006544 X=9, Y=1.5643446504023087 (2)x’=2x+3y, y’=2x+y, x(0)=-2.7,y(0)=2.8, 0<t<10, 作相平面图。解:使用matlab工具:先解微分方程组...
用matlab求解二阶微分方程答:theta=pi/6;[x,y]= ode45(@odefun,[0,0.18],[0.5,theta])plot(x,y),grid on legend('y (x)','y’(x)')xlabel('x'),ylabel('y (x),y’(x)')figure(2)plot(y(:,1),y(:,2)),grid on xlabel('y (x)'),ylabel('y’(x)')title('y (x)—y’(x)的相平面图...