dsolve function returning empty sum

2019 3 10
1 个回答
回答已采纳
更新时间：2019 3 10
9 次查看（30 天）

0 个投票

Following is the code to solve ode 2nd order ODE d^2y/dt^2+y=0; y(0)=1; y'(0)=0;
I find that the following code works
dsolve('D2y+y=0','y(0)=1','Dy(0)=0')
and it does not work when following code is executed(very equivalent of above code), returns empty sum
syms y(t)
eqn= diff(y,t,2)+ y ==0;
dsolve(eqn,'y(0)=1','Dy(0)=0')
Any idea, sure I did not understand something.

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2019-3-10

0 个投票

syms y(t)
dy = diff(y,t);
eqn = diff(y, t, 2) + y == 0;
dsolve(eqn, y(0)==1, dy(0)==0)

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Introduction to Installation and Licensing 的更多信息

产品

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by