MATLAB问题：y=dsolve('(Dy)^2-x*Dy+y=0','x'),y(1)是个什么东西?y=dsolve('(Dy)^2-x*Dy+y=0','x')ezplot(y(1),[-6,6,-4,8],1)已知：y(1)=x^2/4y(1)是个什么东西?

matlab中 y=dsolve('Dy+a*y=b','y(0)=y0') Matlab求常微分方程为什么错误 dsolve('Dy=-2x*y/(x^2+2*a)')这个matlab提示：Error using ==> dsolve at 126Can not use D as a variable in DSOLVE. MATLAB问题：y=dsolve('(Dy)^2-x*Dy+y=0','x'),y(1)是个什么东西?y=dsolve('(Dy)^2-x*Dy+y=0','x')ezplot(y(1),[-6,6,-4,8],1)已知：y(1)=x^2/4y(1)是个什么东西? matlab小问题matlab中如果我想求解常微分问题,会用到dsolve,但是怎么保证我算的那个函数的变量与我想要的一致?比如如下程序应该是：soln_1 = dsolve('Dy =3*x^2','y(2)=0.5') ans=x^3-7.500000000000000 现在却 matlab用dsolve解常微分方程并画图,例如y'=1-y^2,y(0)=0. matlab ode45的问题%定义函数function dy = For_y( t,y )dy=zeros(2,1);Dy(1)=y(2);Dy(2)=2;end %求解微分方程[Tget,Yget]=ode45(@For_y,[0 10],[0,0]);plot(Tget,Yget,'-*');%得出的图%同样的方程用dsolve函数就可以求y=dsolve( 在matlab中求三元微分方程组的问题有如下语句:dsolve('Dx=-y-z','Dy=x+0.1*y','Dz=2+z*(x-4)')无法解出,为啥? matlab的解微分方程问题>> soln_1 = dsolve('Dy = 3*x^2','y(2)=0.5') soln_1 =3*x^2*t-6*x^2+1/2正确答案应该是 ans= x^3-7.500000000000000 为什么会出现错误呢? 请教一个用matlab求解微分方程数值解的问题 题意：求dy/dt=2/(sqrt(1-t^2)),-1 s=dsolve('Dy=2/sqrt(1+t^2)','y(0)=1')>> ezplot(s,[-1 1]);grid minor;请问上面使用ode23求解的过程错在哪?书宬：应该是s=dsolve('Dy=2/sqrt(1 matlab解不了这个简单的微分方程dequ='D2y=-GM/(y^2)'y=dsolve(dequ,'y(0)=R0','t')运行结果：Warning:Explicit solution could not be found.> In dsolve at 101怎么回事? matlab 符号常微分y=dsolve('D2y-100*(1-y^2)*Dy=-y','y(0)=2,Dy(0)=0','x')哪里错了? y=dsolve('D2y=(-9.8sin(y))','t')用matlab怎么解出y的轨迹?就是y对t的二阶导加上9.8siny=0 Matlab解非线性微分方程组的问题要求解的方程组为：dx/dt=-x+y^2dy/dt=-2y+x^2x(0)=y(0)=1如何用Matlab解该方程组,并且画出相轨图（即x-y图象）?我用dsolve函数, >> MATLAB中Y=dsolve('int(sqrt(1+(Dy)^2=Dy*(1-x)+y))','y(0)=0,Dy(0)=0','x')哪里错了? matlab（1-x）*y''=0.2*sqrt(1+y'^2) 输入y=dsolve('(1-x)*D2y-0.2*sqrt(1+(Dy)^2)=0', 求各路大神指导,MATLAB中：利用dsolve求解偏微分方程 的解（用符号计算）.利用dsolve求解偏微分方程dx/dt=y,dy/dt=-x的解（用符号计算） matlab问题：plot Conversion to double from sym is not possible,这是我的代码,x=0:1:11;y=dsolve('Dy-0.08*y=0','y(0)=80423','x');subplot(2,2,1);ezplot(y,[0,30]);subplot(2,2,2);z=double(x)plot(z,y)为什么用plot就出现上述问题啊,是不 MATLAB中dsolve函数用法?