Hypervolume

class moocore.Hypervolume(ref, maximise=False)

Object-oriented interface for the hypervolume indicator.

See also

For details about parameters, return value and examples, see hypervolume().

Parameters:

• ref (ArrayLike) – Reference point as a 1D vector. Must be same length as a single point in the data.

• maximise (bool | list[bool], default: False) – Whether the objectives must be maximised instead of minimised. Either a single boolean value that applies to all objectives or a list of booleans, with one value per objective. Also accepts a 1D numpy array with value 0/1 for each objective

Examples

Default is minimization, we can easily assume maximization.

>>> hv_ind = moocore.Hypervolume(ref=0, maximise=True)
>>> hv_ind([[5, 5], [4, 6], [2, 7], [7, 4]])
39.0
>>> hv_ind([[5, 5], [4, 6], [7, 4]])
37.0

__call__(data)

Compute hypervolume indicator.

Parameters:

data (ArrayLike) – Numpy array of numerical values, where each row gives the coordinates of a point. If the array is created from the read_datasets() function, remove the last column.

Returns:

float – A single numerical value, the hypervolume indicator