Source code for gemseo.algos.doe.lib_pydoe

# Copyright 2021 IRT Saint Exupéry,
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License version 3 as published by the Free Software Foundation.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
# Contributors:
#    INITIAL AUTHORS - initial API and implementation and/or initial
#                           documentation
#        :author: Damien Guenot
"""PyDOE algorithms wrapper."""

from __future__ import annotations

from import Iterable
from import Sequence
from typing import TYPE_CHECKING
from typing import ClassVar
from typing import Optional
from typing import Union

import pyDOE2 as pyDOE
from numpy.random import RandomState

from gemseo.algos._unsuitability_reason import _UnsuitabilityReason
from gemseo.algos.doe.doe_library import DOEAlgorithmDescription
from gemseo.algos.doe.doe_library import DOELibrary
from gemseo.algos.doe.pydoe_full_factorial_doe import PyDOEFullFactorialDOE
from gemseo.typing import RealArray

    from gemseo.algos.design_space import DesignSpace
    from gemseo.algos.opt_problem import OptimizationProblem
    from gemseo.core.parallel_execution.callable_parallel_execution import CallbackType

OptionType = Optional[
    Union[str, int, float, bool, Sequence[int], tuple[int, int], RealArray]

[docs] class PyDOE(DOELibrary): """PyDOE optimization library interface See DOELibrary.""" # Available designs PYDOE_DOC = "" PYDOE_LHS = "lhs" PYDOE_LHS_DESC = "Latin Hypercube Sampling implemented in pyDOE" PYDOE_LHS_WEB = PYDOE_DOC + "randomized.html#latin-hypercube" PYDOE_2LEVELFACT = "ff2n" PYDOE_2LEVELFACT_DESC = "2-Level Full-Factorial implemented in pyDOE" PYDOE_2LEVELFACT_WEB = PYDOE_DOC + "factorial.html#level-full-factorial" PYDOE_FULLFACT = "fullfact" PYDOE_FULLFACT_DESC = "Full-Factorial implemented in pyDOE" PYDOE_FULLFACT_WEB = PYDOE_DOC + "factorial.html#general-full-factorial" PYDOE_PBDESIGN = "pbdesign" PYDOE_PBDESIGN_DESC = "Plackett-Burman design implemented in pyDOE" PYDOE_PBDESIGN_WEB = PYDOE_DOC + "factorial.html#plackett-burman" PYDOE_BBDESIGN = "bbdesign" PYDOE_BBDESIGN_DESC = "Box-Behnken design implemented in pyDOE" PYDOE_BBDESIGN_WEB = PYDOE_DOC + "rsm.html#box-behnken" PYDOE_CCDESIGN = "ccdesign" PYDOE_CCDESIGN_DESC = "Central Composite implemented in pyDOE" PYDOE_CCDESIGN_WEB = PYDOE_DOC + "rsm.html#central-composite" ALGO_LIST: ClassVar[list[str]] = [ PYDOE_FULLFACT, PYDOE_2LEVELFACT, PYDOE_PBDESIGN, PYDOE_BBDESIGN, PYDOE_CCDESIGN, PYDOE_LHS, ] DESC_LIST: ClassVar[list[str]] = [ PYDOE_FULLFACT_DESC, PYDOE_2LEVELFACT_DESC, PYDOE_PBDESIGN_DESC, PYDOE_BBDESIGN_DESC, PYDOE_CCDESIGN_DESC, PYDOE_LHS_DESC, ] WEB_LIST: ClassVar[list[str]] = [ PYDOE_FULLFACT_WEB, PYDOE_2LEVELFACT_WEB, PYDOE_PBDESIGN_WEB, PYDOE_BBDESIGN_WEB, PYDOE_CCDESIGN_WEB, PYDOE_LHS_WEB, ] CRITERION_KEYWORD = "criterion" ITERATION_KEYWORD = "iterations" ALPHA_KEYWORD = "alpha" FACE_KEYWORD = "face" CENTER_BB_KEYWORD = "center_bb" CENTER_CC_KEYWORD = "center_cc" LIBRARY_NAME = "PyDOE" def __init__(self) -> None: # noqa:D107 super().__init__() for idx, algo in enumerate(self.ALGO_LIST): self.descriptions[algo] = DOEAlgorithmDescription( algorithm_name=algo, description=self.DESC_LIST[idx], internal_algorithm_name=algo, library_name=self.__class__.__name__, website=self.WEB_LIST[idx], ) self.descriptions["bbdesign"].minimum_dimension = 3 self.descriptions["ccdesign"].minimum_dimension = 2 def _get_options( self, alpha: str = "orthogonal", face: str = "faced", criterion: str | None = None, iterations: int = 5, eval_jac: bool = False, center_bb: int | None = None, center_cc: tuple[int, int] | None = None, n_samples: int | None = None, levels: Sequence[int] | None = None, n_processes: int = 1, wait_time_between_samples: float = 0.0, seed: int | None = None, max_time: float = 0, callbacks: Iterable[CallbackType] = (), **kwargs: OptionType, ) -> dict[str, OptionType]: # pylint: disable=W0221 """Set the options. Args: alpha: A parameter to describe how the variance is distributed. Either "orthogonal" or "rotatable". face: The relation between the start points and the corner (factorial) points. Either "circumscribed", "inscribed" or "faced". criterion: The criterion to use when sampling the points. If ``None``, randomize the points within the intervals. iterations: The number of iterations in the `correlation` and `maximin` algorithms. eval_jac: Whether to evaluate the jacobian. center_bb: The number of center points for the Box-Behnken design. If ``None``, use a pre-determined number of points. center_cc: The 2-tuple of center points for the central composite design. If ``None``, use (4, 4). n_samples: The number of samples. If there is a parameter ``levels``, the latter can be specified and the former set to its default value ``None``. levels: The levels. If there is a parameter ``n_samples``, the latter can be specified and the former set to its default value ``None``. n_processes: The maximum simultaneous number of processes used to parallelize the execution. wait_time_between_samples: The waiting time between two samples. seed: The seed used for reproducibility reasons. If ``None``, use :attr:`.seed`. max_time: The maximum runtime in seconds, disabled if 0. callbacks: The functions to be evaluated after each call to :meth:`.OptimizationProblem.evaluate_functions`; to be called as ``callback(index, (output, jacobian))``. **kwargs: The additional arguments. Returns: The options for the DOE. """ if center_cc is None: center_cc = [4, 4] return self._process_options( alpha=alpha, face=face, criterion=criterion, iterations=iterations, center_cc=center_cc, center_bb=center_bb, eval_jac=eval_jac, n_samples=n_samples, n_processes=n_processes, levels=levels, wait_time_between_samples=wait_time_between_samples, seed=seed, max_time=max_time, callbacks=callbacks, **kwargs, ) @staticmethod def __translate( result: RealArray, ) -> RealArray: """Translate the DOE design variables to [0,1]. Args: result: The design variables to be translated. Returns: The translated design variables. """ return (result + 1.0) * 0.5 def _generate_samples( self, design_space: DesignSpace, **options: OptionType ) -> RealArray: if self.algo_name == self.PYDOE_LHS: return pyDOE.lhs( design_space.dimension, random_state=RandomState(self._seeder.get_seed(options[self.SEED])), samples=options[self.N_SAMPLES], criterion=options.get(self.CRITERION_KEYWORD), iterations=options.get(self.ITERATION_KEYWORD), ) if self.algo_name == self.PYDOE_CCDESIGN: return self.__translate( pyDOE.ccdesign( design_space.dimension, center=options[self.CENTER_CC_KEYWORD], alpha=options[self.ALPHA_KEYWORD], face=options[self.FACE_KEYWORD], ) ) if self.algo_name == self.PYDOE_BBDESIGN: # Initially designed for quadratic model fitting # center point is can be run several times to allow for a more # uniform estimate of the prediction variance over the # entire design space. Default value of center depends on dv_size return self.__translate( pyDOE.bbdesign( design_space.dimension, center=options.get(self.CENTER_BB_KEYWORD), ) ) if self.algo_name == self.PYDOE_FULLFACT: return PyDOEFullFactorialDOE().generate_samples( options.pop(self.N_SAMPLES), design_space.dimension, **options, ) if self.algo_name == self.PYDOE_2LEVELFACT: return self.__translate(pyDOE.ff2n(design_space.dimension)) if self.algo_name == self.PYDOE_PBDESIGN: return self.__translate(pyDOE.pbdesign(design_space.dimension)) msg = f"Bad algo_name: {self.algo_name}" raise ValueError(msg) @classmethod def _get_unsuitability_reason( cls, algorithm_description: DOEAlgorithmDescription, problem: OptimizationProblem, ) -> _UnsuitabilityReason: reason = super()._get_unsuitability_reason(algorithm_description, problem) if reason or problem.dimension >= algorithm_description.minimum_dimension: return reason return _UnsuitabilityReason.SMALL_DIMENSION