Solving a differential equation?

I am trying to solve the equation exp(y) + (t*exp(y) - sin(y))y' = 0 using dsolve and make a contour plot and what I have is

syms y t;

sol = dsolve('exp(y) + (t*exp(y) - sin(y))*Dy = 0')

This keeps giving me the error Warning: Explicit solution could not be found; implicit solution returned.

How do I fix this?

Answer 1

[Torsten]

The message is not an error message.

It's just an information that the solution to your differential equation can not be given in explicit form

y(t)=something.

If you want to make a contour plot, specify an initial condition and try "ezplot".

If this does not work, use a numerical ODE integrator (e.g. ODE45).

Best wishes

Torsten.