[ADMB Users] Are parameters scaled for optimization.
davef at otter-rsch.com
Wed Jan 8 07:51:44 PST 2014
Bounded initial parameters are bounded to lie between -1 and 1 from the
point of view of the function minimizer (sort of). This has nothing
to do with what the
optimal scaling for the parameter might be. To change the scaling one
member function. set_scalefactor has been available for dvariable
types for a long time,
but was not fully implemented for random effects. It is now implemented for
init numbers and init vectors both bounded and unbounded.
Note the unbounded variables are not bounded from the point of view of the
function minimizer (neither are bounded ones strictly speaking).
Anyway I think there is a confusion here between bounding and optimal
scaling. They are really separate issues.
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