moarchiving 0.5.3

Biobjective Archive class with hypervolume indicator and uncrowded hypervolume improvement computation

Introduction

The Python class moarchiving.BiobjectiveNondominatedSortedList implements a bi-objective non-dominated archive with list as parent class. It is heavily based on the bisect module. It provides easy and fast access to the overall hypervolume, the contributing hypervolume of each element, and to the uncrowded hypervolume improvement of any given point in objective space.

Installation

Either via

pip install git+https://github.com/CMA-ES/moarchiving.git@master

or simply via

pip install moarchiving

The single file moarchiving.py (from the moarchiving/ folder) can also be directly used by itself when copied in the current folder or in a path visible to Python (e.g. a path contained in sys.path).

Details

moarchiving uses the fractions.Fraction type to avoid rounding errors when computing hypervolume differences, but its usage can also easily switched off by assigning the respective class attribute. The Fraction type may become prohibitively computationally expensive with increasing precision.

Releases

• 0.5.3 fixed assertion error when not using fractions.Fraction
• 0.5.2 first published version

Links

• Code on Github
• Documentation (possibly slightly outdated) in
  • this page plus performance test examples
  • apidocs format
  • epydocs format