Define lower-upper bound for parameters in Optim using Nelder-Mead method

Dear UseRs,

Is there a way to define the lower-upper bounds for parameters fitted by
optim using the Nelder-Mead method ?

It depends a bit on whether it's plausible that the solution is on the
boundary.  If not, simply returning Inf for values outside the range
will work.

    -thomas

Thomas Lumley
Professor of Biostatistics
University of Auckland