How can I solve an ODE in Matlab (2008a)

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Esraa Abdelkhaleq 2016-4-30

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https://ww2.mathworks.cn/matlabcentral/answers/281881-how-can-i-solve-an-ode-in-matlab-2008a

编辑： Esraa Abdelkhaleq 2016-5-1

I have an old version of Matlab (2008), when I try to create an ODE function and solve it, it does not work and errors appear as follows:

>> syms y(t)

??? Undefined function or method 'syms' for input arguments of type 'char'.

>> y(t) = dsolve(diff(y,t) == t*y)

??? Undefined function or variable 'y'.

In fact,this is a simple example to practice solving this type of equations. I want to solve another equation in the form of:

(dq_Pl (t))/dt = f_(Pl,T) R_T N_(T,0) e^(K_GR t) + f_(Pl,H) R_H N_(H,0) - k_El q_Pl (t)

I want to know the basics of solving such ODE's.

Thanks,

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Star Strider 2016-4-30

在 MATLAB Online 中打开

Do you have the Symbolic Math Toolbox?

In the Command Window type:

ver

If you have it, it should appear in the list.

---------------------------

Assuming that you have it, then, type either:

help dsolve

or:

doc dsolve

to get the relevant information on how to use the function.

Esraa Abdelkhaleq 2016-5-1

编辑：Esraa Abdelkhaleq 2016-5-1

Thanks for your help. It showed that dsolve not found. Is the Symbolic Math Toolbox unique to all Matlab versions, or each version has its own toolbox. I have older Matlab version (2008).

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