[R] maximum likelihood estimation of 5 parameters

[francogrex]

Franco,
You can provide lower and upper bounds on the parameters if you use optim
with method="L-BFGS-B".
Hth, Ingmar

Thanks, but when I use L-BFGS-B it tells me that there is an  error in
optim(start, f, method = method, hessian = TRUE, ...) : L-BFGS-B needs
finite values of 'fn'

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