方程组如下:X1(t) '=- x1(t)x22(t)+0.999+0.42cos(1.75t)X2(t) '=x1(t)x22(t)-x2(t)Y(t)=sin[x1(t)+x2(t)]用matlab中的ode45函数解方程 t∈[0,20],x1(0)=1.0,x2(0)=1.0它的程序是怎么实现的?
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![方程组如下:X1(t) '=- x1(t)x22(t)+0.999+0.42cos(1.75t)X2(t) '=x1(t)x22(t)-x2(t)Y(t)=sin[x1(t)+x2(t)]用matlab中的ode45函数解方程 t∈[0,20],x1(0)=1.0,x2(0)=1.0它的程序是怎么实现的?](/uploads/image/z/7793819-35-9.jpg?t=%E6%96%B9%E7%A8%8B%E7%BB%84%E5%A6%82%E4%B8%8B%EF%BC%9AX1%28t%29+%EF%BC%87%3D-+x1%28t%29x22%28t%29%2B0.999%2B0.42cos%281.75t%29X2%28t%29+%EF%BC%87%3Dx1%28t%29x22%28t%29-x2%28t%29Y%28t%29%3Dsin%5Bx1%28t%29%2Bx2%28t%29%5D%E7%94%A8matlab%E4%B8%AD%E7%9A%84ode45%E5%87%BD%E6%95%B0%E8%A7%A3%E6%96%B9%E7%A8%8B+t%E2%88%88%5B0%2C20%5D%2Cx1%280%29%3D1.0%2Cx2%280%29%3D1.0%E5%AE%83%E7%9A%84%E7%A8%8B%E5%BA%8F%E6%98%AF%E6%80%8E%E4%B9%88%E5%AE%9E%E7%8E%B0%E7%9A%84%3F)
方程组如下:X1(t) '=- x1(t)x22(t)+0.999+0.42cos(1.75t)X2(t) '=x1(t)x22(t)-x2(t)Y(t)=sin[x1(t)+x2(t)]用matlab中的ode45函数解方程 t∈[0,20],x1(0)=1.0,x2(0)=1.0它的程序是怎么实现的?
方程组如下:X1(t) '=- x1(t)x22(t)+0.999+0.42cos(1.75t)X2(t) '=x1(t)x22(t)-x2(t)Y(t)=sin[x1(t)+x2(t)]用matlab中的ode45函数解方程 t∈[0,20],x1(0)=1.0,x2(0)=1.0它的程序是怎么实现的?
方程组如下:X1(t) '=- x1(t)x22(t)+0.999+0.42cos(1.75t)X2(t) '=x1(t)x22(t)-x2(t)Y(t)=sin[x1(t)+x2(t)]用matlab中的ode45函数解方程 t∈[0,20],x1(0)=1.0,x2(0)=1.0它的程序是怎么实现的?
抱歉Matlab6.5没有提供匿名函数上面的程序 没法运行 请升级Matlab 或者 改用inline函数 或者使用m文件 如下:%主调函数,直接在Matlab中输入tspan=[0 20];x0=[1 1];[t,x]=ode45('odefun',tspan,x0);y=sum(x,2);plot(t,y)%微分方程保存为M文件function dx=odefun(t,x)dx=[-x(1)*x(2)^2+0.99+0.42*cos(1.75*t) x(1)*x(2)^2-x(2)]; 查看原帖>>