Source code for easyvvuq.sampling.random
from .base import BaseSamplingElement, Vary
__copyright__ = """
Copyright 2018 Robin A. Richardson, David W. Wright
This file is part of EasyVVUQ
EasyVVUQ is free software: you can redistribute it and/or modify
it under the terms of the Lesser GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
EasyVVUQ is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
"""
__license__ = "LGPL"
[docs]class RandomSampler(BaseSamplingElement, sampler_name="random_sampler"):
def __init__(self, vary=None, count=0, max_num=0, analysis_class=None):
"""
Expects dict of var names, and their corresponding distributions
"""
self.vary = Vary(vary)
self.count = count
self.max_num = max_num
if analysis_class is not None:
self.analysis_class_ = analysis_class
[docs] def element_version(self):
return "0.1"
[docs] def is_finite(self):
if self.max_num > 0:
return True
return False
@property
def analysis_class(self):
"""Return a corresponding analysis class.
"""
if self.analysis_class_ is not None:
return self.analysis_class_
else:
raise NotImplementedError
[docs] def n_samples(self):
"""Returns the number of samples in this sampler.
Returns
-------
if the user specifies maximum number of samples than return that, otherwise - error
"""
if self.is_finite():
return self.max_num
else:
raise RuntimeError("You can't get the number of samples in an infinite sampler")
def __next__(self):
if self.is_finite():
if self.count >= self.max_num:
raise StopIteration
run_dict = {}
for param_name, dist in self.vary.get_items():
run_dict[param_name] = dist.sample(1)[0]
self.count += 1
return run_dict