Have you considered "optim" in library(MASS)? "optim" will optionally output the hessian, which can be used to obtain confidence intervals in many cases.

hope this helps. spencer graves

Marcel Vieira wrote:
Dear R users,

I am trying to minimise a function using "nlm".

I am getting the following error message: "Error: function is too long to keep source"

The function is really very long (about 100 A4 pages).

Is there anything I could do to solve this problem?

At the moment I am using "nlmin" in S-Plus with no problems but I'd prefer to use R.

Thank you very much in advance.

Regards.
Marcel

Marcel Vieira
Social Statistics
University of Southampton

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