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%%ODE45_fun½â·½³Ì tspan=[0,1e-5]; x0=[2.1e+10,1,1,1,1]; [t,x]=ode45('ODE45_fun',tspan,x0); a1=1;a2=1;e1=9;e2=7;f1=56;f2=98;g1=76;g2=665; a=a1+a2; e=e1+e2; f=f1+f2; g=g1+g2; [n,m]=size(x); for i=1:n x(i,6)=x(i,4)*x(i,5)+x(i,2)*x(i,3)+e*f+e*g; end data=[t,x]; save ODE45_data.txt data -ascii subplot(2,3,1),plot(t,x(1)) subplot(2,3,2),plot(t,x(2)) subplot(2,3,3),plot(t,x(3)) subplot(2,3,4),plot(t,x(4)) subplot(2,3,5),plot(t,x(5)) subplot(2,3,6),plot(t,x(6)) Warning: Failure at t=1.075809e-007. Unable to meet integration tolerances without reducing the step size below the smallest value allowed (2.117582e-022) at time t. > In ode45 at 355 »¹ÓÐΪʲô»á³öÏÖ¾¯¸æ |
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