> Hello everybody,
> i already searched the archieves, but i still don't know what is wrong
> in my implementation, mybe anybody coud give me some advice
> i always got an error message: Argument "theta" is missing, with no default
> but i don't know what is wrong?
>From the help page:
fn: A function to be minimized (or maximized), with first
argument the vector of parameters over which minimization is
to take place. It should return a scalar result.
ll1 is not such a function, and I think you need to replace the first 6
arguments by a single 6-element vector.