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

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Esraa Abdelkhaleq
Esraa Abdelkhaleq 2016-4-30
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,
  2 个评论
Star Strider
Star Strider 2016-4-30
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
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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