MATLAB ODE solver

Anyone have much knowledge on the ODE solvers in matlab? I have an ODE and I want to specificy whether the input is time or the y value for the dy/dt problem.
 Recognitions: Gold Member Science Advisor Could you please be more specific. You can only have one variable in an ODE and in this case that variable is t, i.e. the equation is dy/dt=f(t) where f is some function of t (and ONLY of t, otherwise it is a PDE). In order to have a single solution to this ODE you then only need the initial value of y at time 0, i.e. y(0).
 Cool thanks I think thats what I was looking for.