MutatorB#

class pybrops.opt.algo.pymoo_addon.MutatorB(setspace, phc, nhcstep, **kwargs)[source]#

Bases: Mutation

Randomly test nearby solutions and randomly choose one solution that exhibits extreme values for one of the objectives.

Constructor for SubsetMutation.

Parameters:

setspace (numpy.ndarray) – Set space of which individuals are a discrete subset.
phc (float) – Probability that an individiual is hillclimbed.
nhc (int) – Number of steps to take during hillclimbing.
kwargs (dict) – Additional keyword arguments used for cooperative inheritance.

Methods

`do`
`get_prob_var`
`hillclimb`	Hillclimb mutation for a single individual.
`reduced_exchange`	Perform a reduced exchange mutation

Attributes

Set space from which to sample elements.

__call__(problem, elem, *args, to_numpy=False, **kwargs)#: Call self as a function.

hillclimb(problem, x, *args, **kwargs)[source]#

Hillclimb mutation for a single individual.

Parameters:

Returns:

out – Chromosome of a single individual.

Return type:

numpy.ndarray

reduced_exchange(problem, x, *args, **kwargs)[source]#

Perform a reduced exchange mutation