optim(par, fn, gr = NULL,
method = c("Nelder-Mead", "BFGS", "CG", "L-BFGS-B", "SANN"),
lower = -Inf, upper = Inf,
control = list(), hessian = FALSE, ...)By "fn", I meant the function you supply for that argument.
spencer graves
Hae-Kyung Im wrote:
Hi, Thanks for your reply.
I did search in google but I couldn't really find a list of error codes. Although you're right, that wouldn't probably help me much.
What do you mean by using "fn" as a stand-alone function? Do you mean the function I'm maximizing?
Haky
On Thu, 4 Sep 2003, Spencer Graves wrote:
I just did a Google search for "lapack error codes" and got several hits. However, I don't know if a translation of "error code 17" would really help you.
Have you tried "fn" as a stand-alone function? If yes, have you tried including a "cat" or "print" statement in it, so it prints the value (and maybe the arguments) before it actually returns it? If optim is going to run more than a few seconds, I have "fn" print the value it returns. If it returns NA. I see that, etc.
hope this helps. spencer graves
Hae-Kyung Im wrote:
Does any of you know where I can find an explanation of lapack errors codes? I get error code 17 when using optim().
Is there a way to handle errors in R such that depending on the type of error I can decide what to do next?
Thanks, Haky
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