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dmnfb
2000 Sep 26
2
bounds violations, infinite loops in optim/L-BFGS-B (PR#671)
I'm having some trouble with optim(method="L-BFGS-B"),
and I'm not sure I have the ability to track down and fix
what seem to be bugs within optim().
I'm bootstrapping an original data set and fitting a model
to each bootstrapped data set. For some bootstrapped samples,
optim() sets negative parameter values (despite the fact that
I have explicitly set non-zero lower