optimiDefaultConstraint: Returns function for parameter constraint.
Description
returns the current default function for constraining a
parameter.
Usage
val <- optimiDefaultConstraint(constraint)
Arguments
constraint
the type of constraint you want to place on the parameter, options include 'positive' (gives an 'exp' constraint) and 'zeroone' (gives a 'sigmoid' constraint).
Value
vala list with two components: 'func' for the name of function
used to apply the constraint, and 'hasArgs' for a boolean flag if
the function requires additional arguments.