Hi All,
Thanks for all of your help. I hadn't posted error messages, because I had
tried many different formulations of those functions and each one gave a
different error message. However, using your suggestions, I managed to make
it work.
You were right in that I only needed to call the constan
Without data I can't check, but try :
mle(nll,start=list(c=0.01,z=2.1,s=200),fixed=list(V=Var,M=Mean))
With a random dataset I get :
> Mean <- rnorm(136)
> Var <- 1 + rnorm(136)^2
> mle(nll,start=list(c=0.01,z=2.1,s=200),fixed=list(V=Var,M=Mean))
Error in optim(start, f, method = method, hessian
Hi,
When you report errors please send a reproducible example that will allow us to
better help you. At a minimum, you should cut and paste the actual call and
the error message.
I think the problem is that you should only have parameters as arguments, i.e.
only c and z should be in the argum
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