def test_group_sample_fails_with_wrong_G_matrix():
N = 6
num_levels = 4
grid_jump = 2
problem = {'bounds': [[0., 1.], [0., 1.], [0., 1.], [0., 1.]],
'num_vars': 4,
'groups': (list([1, 2, 3, 4]), None)}
with raises(TypeError):
sample(problem, N, num_levels, grid_jump)
def test_optimal_trajectories_lt_samples(setup_param_file):
parameter_file = setup_param_file
problem = read_param_file(parameter_file)
samples = 10
num_levels = 4
with raises(ValueError):
sample(problem, samples, num_levels, optimal_trajectories=samples)
def test_optimal_trajectories_lt_samples(setup_param_file):
parameter_file = setup_param_file
problem = read_param_file(parameter_file)
samples = 10
num_levels = 4
with raises(ValueError):
sample(problem, samples, num_levels,
optimal_trajectories=samples)
def test_group_sample_fails_with_wrong_G_matrix():
N = 6
num_levels = 4
problem = {'bounds': [[0., 1.], [0., 1.], [0., 1.], [0., 1.]],
'num_vars': 4,
'groups': list([1, 2, 3])}
with raises(ValueError) as err:
sample(problem, N, num_levels)
assert "Groups do not match to number of variables" in str(err)
def test_even_num_levels_no_warning(setup_param_file_with_groups):
parameter_file = setup_param_file_with_groups
problem = read_param_file(parameter_file)
with warnings.catch_warnings(record=True) as w:
# Cause all warnings to always be triggered.
warnings.simplefilter("always")
# Trigger a warning.
sample(problem, 10, num_levels=4)
# Verify some things
assert len(w) == 0
def test_optimal_trajectories_lt_samples():
parameter_file = setup_param_file()
problem = read_param_file(parameter_file)
samples = 10
num_levels = 4
grid_jump = 2
sample(problem, samples, num_levels, grid_jump, \
optimal_trajectories=samples)
def test_group_sample_fails_with_wrong_G_matrix():
N = 6
num_levels = 4
problem = {'bounds': [[0., 1.], [0., 1.], [0., 1.], [0., 1.]],
'num_vars': 4,
'groups': list([1, 2, 3])}
with raises(ValueError) as err:
sample(problem, N, num_levels)
assert "Groups do not match to number of variables" in str(err.value)
def test_optimal_trajectories_lt_10(setup_param_file):
parameter_file = setup_param_file
problem = read_param_file(parameter_file)
samples = 10
num_levels = 4
grid_jump = 2
optimal_trajectories = 11
with raises(ValueError):
sample(problem, samples, num_levels, grid_jump,
optimal_trajectories=optimal_trajectories)
def test_odd_num_levels_raises_warning(setup_param_file_with_groups):
parameter_file = setup_param_file_with_groups
problem = read_param_file(parameter_file)
with warnings.catch_warnings(record=True) as w:
# Cause all warnings to always be triggered.
warnings.simplefilter("always")
# Trigger a warning.
sample(problem, 10, num_levels=3)
# Verify some things
assert len(w) == 1
assert issubclass(w[-1].category, UserWarning)
assert "num_levels should be an even number, sample may be biased" in str(w[-1].message)
def test_group_sample_fails_with_wrong_G_matrix():
N = 6
num_levels = 4
problem = {
'bounds': [[0., 1.], [0., 1.], [0., 1.], [0., 1.]],
'num_vars': 4,
'groups': list([1, 2, 3])
}
expected_err = ".*Groups do not match to number of variables.*"
with raises(ValueError, match=expected_err):
sample(problem, N, num_levels)
def __init__(self, param, N=12, num_levels=4):
"""
:param dict param: Uncertain parameters for the sensitivity analysis
{"parameter name": [lower bound, upper bound]}
:param int N: The number of trajectories to generate (recommended 10-20)
:param int num_levels: The number of grid levels (default 4)
"""
self.idf = None
self.num_levels = num_levels
self.problem = {'num_vars': len(param), 'names': [], 'bounds': []}
self.problem['bounds'] = param['bounds']
self.problem['num_vars'] = param['num_vars']
self.objects = param['obj_id']
for obj in self.objects:
# TODO find longest string match in list instead of using obj[0]
self.problem['names'].append(obj[0])
'''
for k, v in param.items():
self.problem['names'].append(k)
range = v['range']
self.problem['bounds'].append(range)
'''
self.X = sample(self.problem, N, num_levels)
self.y = None
self.si = None
def main(config):
processed_data_path = config['paths']['data']
results_path = config['paths']['output']
# Set up problem for sensitivity analysis
problem = {
'num_vars': 2,
'names':
['cost_uncertainty_parameter', 'damage_uncertainty_parameter'],
'bounds': [[0.0, 1.0], [0.0, 1.0]]
}
# And create parameter values
param_values = morris.sample(problem,
10,
num_levels=4,
optimal_trajectories=8,
local_optimization=False)
param_values = list(set([(p[0], p[1]) for p in param_values]))
with open("parameter_combinations.txt", "w+") as f:
# f.write("parameter_set cost_uncertainty_parameter damage_uncertainty_parameter\n")
for p in range(len(param_values)):
f.write(f"{p},{param_values[p][0]},{param_values[p][1]}\n")
f.close()
num_blocks = len(param_values)
"""Next we call the failure analysis script and loop through the falure scenarios
"""
args = [
"parallel", "-j",
str(num_blocks), "--colsep", ",", "-a", "parameter_combinations.txt",
"python", "direct_damage_calculations_parallel.py", "{}"
]
print(args)
subprocess.run(args)
def test_regression_morris_groups_brute_optim(self, set_seed):
set_seed
param_file = 'src/SALib/test_functions/params/Ishigami_groups.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem, N=50,
num_levels=4,
optimal_trajectories=6,
local_optimization=False)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y,
conf_level=0.95, print_to_console=False,
num_levels=4)
assert_allclose(Si['mu'], [9.786986, np.NaN],
atol=0, rtol=1e-5)
assert_allclose(Si['sigma'], [6.453729, np.NaN],
atol=0, rtol=1e-5)
assert_allclose(Si['mu_star'], [9.786986, 7.875],
atol=0, rtol=1e-5)
def test_morris_to_df():
params = ['x1', 'x2', 'x3', 'x4', 'x5', 'x6', 'x7', 'x8']
problem = {
'num_vars':
8,
'names':
params,
'groups':
None,
'bounds': [[0.0, 1.0], [0.0, 1.0], [0.0, 1.0], [0.0, 1.0], [0.0, 1.0],
[0.0, 1.0], [0.0, 1.0], [0.0, 1.0]]
}
param_values = morris_sample.sample(problem,
N=1000,
num_levels=4,
optimal_trajectories=None)
Y = Sobol_G.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y)
Si_df = Si.to_df()
assert isinstance(Si_df, pd.DataFrame), \
"Morris Si: Expected DataFrame, got {}".format(type(Si_df))
expected_index = set(params)
assert set(Si_df.index) == expected_index, "Incorrect index in DataFrame"
col_names = ['mu', 'mu_star', 'sigma', 'mu_star_conf']
assert set(Si_df.columns) == set(col_names), \
"Unexpected column names in DataFrame. Expected {}, got {}".format(
col_names, Si_df.columns)
def test_morris_to_df():
params = ['x1', 'x2', 'x3', 'x4', 'x5', 'x6', 'x7', 'x8']
problem = {
'num_vars': 8,
'names': params,
'groups': None,
'bounds': [[0.0, 1.0],
[0.0, 1.0],
[0.0, 1.0],
[0.0, 1.0],
[0.0, 1.0],
[0.0, 1.0],
[0.0, 1.0],
[0.0, 1.0]]
}
param_values = morris_sample.sample(problem, N=1000, num_levels=4,
optimal_trajectories=None)
Y = Sobol_G.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y)
Si_df = Si.to_df()
assert isinstance(Si_df, pd.DataFrame), \
"Morris Si: Expected DataFrame, got {}".format(type(Si_df))
expected_index = set(params)
assert set(Si_df.index) == expected_index, "Incorrect index in DataFrame"
col_names = ['mu', 'mu_star', 'sigma', 'mu_star_conf']
assert set(Si_df.columns) == set(col_names), \
"Unexpected column names in DataFrame. Expected {}, got {}".format(
col_names, Si_df.columns)
def test_regression_morris_optimal(self, set_seed):
'''
Tests the use of optimal trajectories with Morris.
Uses brute force approach
Note that the relative tolerance is set to a very high value
(default is 1e-05) due to the coarse nature of the num_levels.
'''
set_seed
param_file = 'src/SALib/test_functions/params/Ishigami.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem,
N=20,
num_levels=4,
optimal_trajectories=9,
local_optimization=True)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem,
param_values,
Y,
conf_level=0.95,
print_to_console=False,
num_levels=4)
assert_allclose(Si['mu_star'], [9.786986e+00, 7.875000e+00, 1.388621],
atol=0,
rtol=1e-5)
def test_regression_morris_optimal(self, set_seed):
'''
Tests the use of optimal trajectories with Morris.
Uses brute force approach
Note that the relative tolerance is set to a very high value
(default is 1e-05) due to the coarse nature of the num_levels.
'''
set_seed
param_file = 'src/SALib/test_functions/params/Ishigami.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem, N=20,
num_levels=4,
optimal_trajectories=9,
local_optimization=True)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y,
conf_level=0.95, print_to_console=False,
num_levels=4)
assert_allclose(Si['mu_star'],
[9.786986e+00, 7.875000e+00, 1.388621],
atol=0,
rtol=1e-5)
def test_regression_morris_groups_brute_optim(self, set_seed):
set_seed
param_file = 'src/SALib/test_functions/params/Ishigami_groups.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem,
N=50,
num_levels=4,
optimal_trajectories=6,
local_optimization=False)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem,
param_values,
Y,
conf_level=0.95,
print_to_console=False,
num_levels=4)
assert_allclose(Si['mu'], [9.786986, np.NaN], atol=0, rtol=1e-5)
assert_allclose(Si['sigma'], [6.453729, np.NaN], atol=0, rtol=1e-5)
assert_allclose(Si['mu_star'], [9.786986, 7.875], atol=0, rtol=1e-5)
def sample(self):
kwargs = {
'num_levels': 4,
}
kwargs.update(self.kwargs)
problem = self.gen_problem_from_data(self.data, self.feature_names)
return morris_sampler.sample(problem, N=self.N, **kwargs)
def sample(self):
from SALib.sample import morris as morris_sampler
kwargs = {"num_levels": 4}
kwargs.update(self.kwargs)
problem = self.gen_problem_from_data(self.data, self.feature_names)
return morris_sampler.sample(problem, N=self.N, **kwargs)
def generate_parameter_set(parameters,
scenarios,
parameter_range_file='param_range_SA.txt',
sample_file='morris_input.txt',
num_trajectories=10,
num_levels=10,
grid_jump=5,
optimal_trajectories=None,
nboots=5):
""" Generate the file with samples for the analysis of Morris.
Parameters
----------
parameters: OrderedDict([('name', [min, max])])
Names and variation range of quantitative parameters
scenarios: list[tuple(year, variety)]
Years and varieties of wheat on which SA is repeated
"""
# Reset parameter range file
open(parameter_range_file, 'w').close()
generate_parameter_range_file(parameters=parameters,
filename=parameter_range_file)
# Generate samples
problem = read_param_file(parameter_range_file)
for boot in range(nboots):
param_values = sample(problem,
N=num_trajectories,
num_levels=num_levels,
grid_jump=grid_jump,
optimal_trajectories=optimal_trajectories)
# For Method of Morris, save the parameter values in a file (they are needed in the analysis)
s_file = sample_file[:-4] + '_boot' + str(boot) + sample_file[-4:]
np.savetxt(s_file, param_values, delimiter=' ')
# Repeat samples for scenario
full_params = []
for scen in scenarios:
for i_set, param_set in enumerate(param_values):
full_params += [np.insert(param_set, 0, scen).tolist()]
# Add boot number
full_params = [
np.insert(param_set, 0, boot).tolist()
for i_sample, param_set in enumerate(full_params)
]
# Add indices of sample
full_params = [
np.insert(param_set, 0, i_sample).tolist()
for i_sample, param_set in enumerate(full_params)
]
# Save full parameter values
np.savetxt(s_file[:-4] + '_full' + s_file[-4:],
full_params,
delimiter=' ')
def fit(self, X, y):
"""
Fits the regressor to the data `(X, y)` and performs a sensitivity analysis on the result of the regression.
:param X: Training data
:param y: Target values
:return: `self`
"""
from numpy import argpartition
N = len(X[0])
if (self.domain is None) or (self.probs is None):
self._avg_fucn(X, y)
if self.regressor is None:
from sklearn.svm import SVR
self.regressor = SVR()
self.regressor.fit(self.domain, self.probs)
bounds = [[
min(self.domain[:, idx]) - self.margin,
max(self.domain[:, idx]) + self.margin
] for idx in range(N)]
problem = dict(num_vars=N,
names=['x%d' % idx for idx in range(N)],
bounds=bounds)
res = []
if self.method == 'sobol':
from SALib.sample import saltelli
from SALib.analyze import sobol
param_values = saltelli.sample(problem, self.num_smpl)
y_ = self.regressor.predict(param_values)
res = sobol.analyze(problem, y_)['ST']
self.weights_ = res
elif self.method == 'morris':
from SALib.sample import morris as mrs
from SALib.analyze import morris
param_values = mrs.sample(problem,
self.num_smpl,
num_levels=self.num_levels)
y_ = self.regressor.predict(param_values)
res = morris.analyze(problem,
param_values,
y_,
num_levels=self.num_levels)['mu_star']
self.weights_ = res
elif self.method == 'delta-mmnt':
from SALib.sample import latin
from SALib.analyze import delta
param_values = latin.sample(problem, self.num_smpl)
y_ = self.regressor.predict(param_values)
res = delta.analyze(problem,
param_values,
y_,
num_resamples=self.num_resmpl)['delta']
self.weights_ = res
self.top_features_ = argpartition(
res, -self.n_features_to_select)[-self.n_features_to_select:]
return self
def generate_parameter_set(parameters,
scenarios,
parameter_range_file='param_range_SA.txt',
sample_file='morris_input.txt',
num_trajectories=10,
num_levels=10,
grid_jump=5,
optimal_trajectories=None,
nboots=5):
""" Generate the file with samples for the analysis of Morris.
Parameters
----------
parameters: OrderedDict([('name', [min, max])])
Names and variation range of quantitative parameters
scenarios: list[tuple(year, variety)]
Years and varieties of wheat on which SA is repeated
"""
# Reset parameter range file
open(parameter_range_file, 'w').close()
generate_parameter_range_file(parameters=parameters,
filename=parameter_range_file)
# Generate samples
problem = read_param_file(parameter_range_file)
for boot in range(nboots):
param_values = sample(problem, N=num_trajectories,
num_levels=num_levels, grid_jump=grid_jump,
optimal_trajectories=optimal_trajectories)
# For Method of Morris, save the parameter values in a file (they are needed in the analysis)
s_file = sample_file[:-4] + '_boot' + str(boot) + sample_file[-4:]
np.savetxt(s_file, param_values, delimiter=' ')
# Repeat samples for scenario
full_params = []
for scen in scenarios:
for i_set, param_set in enumerate(param_values):
full_params += [np.insert(param_set, 0, scen).tolist()]
# Add boot number
full_params = [np.insert(param_set, 0, boot).tolist()
for i_sample, param_set in enumerate(full_params)]
# Add indices of sample
full_params = [np.insert(param_set, 0, i_sample).tolist()
for i_sample, param_set in enumerate(full_params)]
# Save full parameter values
np.savetxt(s_file[:-4] + '_full' + s_file[-4:],
full_params, delimiter=' ')
def morris():
from SALib.analyze import morris
from SALib.sample.morris import sample
problem = {
'num_vars': 5,
'names': ['HEME', 'K1', 'MPY', 'MPYgu', 'QCC'],
'groups': None,
'bounds': [[.4, .5], [10., 30.], [30., 40.], [15., 25.], [10., 15.]]
}
parameter_values = sample(problem,
N=10,
num_levels=4,
grid_jump=2,
optimal_trajectories=None)
parameters = assign_parameters()
schedule = get_default_schedule()
y_index = np.argmax(o["Curine"])
ys = []
for inputs in parameter_values:
for i in range(len(problem["names"])):
setattr(parameters, problem["names"][i], inputs[i])
_, __, ___, output = pbpk(parameters, schedule)
ys.append(output["Curine"][y_index])
sis = morris.analyze(problem,
parameter_values,
np.array(ys),
conf_level=0.95,
print_to_console=True,
num_levels=4,
grid_jump=2,
num_resamples=100)
import matplotlib.pyplot as plt
from SALib.plotting.morris import horizontal_bar_plot, covariance_plot, sample_histograms
fig, (ax1, ax2) = plt.subplots(1, 2)
horizontal_bar_plot(ax1, sis, {}, sortby='mu_star', unit=r"mg/g")
covariance_plot(ax2, sis, {}, unit=r"mg/g")
fig2 = plt.figure()
sample_histograms(fig2, parameter_values, problem, {'color': 'y'})
plt.show()
def _sample(*args, **kwargs):
self = args[0]
N = self.N
num_levels = kwargs.get('num_levels', 4)
grid_jump = kwargs.get('grid_jump', 2)
optimal_trajectories = kwargs.get('optimal_trajectories', None)
local_optimization = kwargs.get('local_optimization', False)
X = morris_sampler.sample(self.problem, N, num_levels, grid_jump,
optimal_trajectories=optimal_trajectories,
local_optimization=local_optimization)
self.storeKwargs(num_levels=num_levels, grid_jump=grid_jump)
return X
def test_regression_morris_vanilla():
param_file = 'SALib/test_functions/params/Ishigami.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem, N=5000, \
num_levels=10, grid_jump=5, \
optimal_trajectories=None)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y,
conf_level=0.95, print_to_console=False,
num_levels=10, grid_jump=5)
assert_allclose(Si['mu_star'], [8.1, 2.2, 5.4], atol=0, rtol=5e-1)
def _gen_muestrea(símismo, n, ops):
if símismo.método == 'sobol':
return saltelli.sample(problem=símismo.problema, N=n, **ops)
elif símismo.método == 'fast':
return fast_sampler.sample(problem=símismo.problema, N=n, **ops)
elif símismo.método == 'morris':
return morris_muestra.sample(problem=símismo.problema, N=n, **ops)
elif símismo.método == 'dmim':
return latin.sample(problem=símismo.problema, N=n)
elif símismo.método == 'dgsm':
return saltelli.sample(problem=símismo.problema, N=n)
elif símismo.método == 'ff':
return ff_muestra.sample(problem=símismo.problema)
else:
raise ValueError('Método de análisis de sensibilidad "{}" no reconocido.'.format(símismo.método))
def run_salib_morris(target_parameters,
target_output_name,
n_trajectories,
num_levels,
grid_jump,
n_processors=cpu_count() - 1):
num_vars = len(target_parameters)
parameter_names = list(target_parameters.keys())
groups = None
bounds = [target_parameters[name] for name in parameter_names]
problem = {
'num_vars': num_vars,
'names': parameter_names,
'groups': groups,
'bounds': bounds
}
parameter_values = sample(problem,
N=n_trajectories,
num_levels=num_levels,
grid_jump=grid_jump,
optimal_trajectories=None)
ys = None
if n_processors > 1:
chunks = np.array_split(parameter_values, n_processors)
chunks = [(parameter_names, chunk, target_output_name)
for chunk in chunks]
pool = Pool(n_processors)
results = pool.map(hdmpp.generate_outputs, chunks)
ys = np.concatenate(results)
else:
ys = hdmpp.generate_outputs(
(parameter_names, parameter_values, target_output_name))
sis = morris.analyze(problem,
parameter_values,
np.array(ys),
conf_level=0.95,
print_to_console=False,
num_levels=num_levels,
grid_jump=grid_jump,
num_resamples=100)
return problem, parameter_values, sis
def gsa(self,
nb_impacts,
A_indices,
B_indices,
number_of_trajectories,
progressBar=True,
cpus=None,
chunk_size=None):
'''
Samples the A and B element using Morris method and return the computed impact
for the aggregated score and then for each category of impact.
'''
self.A_indices = A_indices
self.B_indices = B_indices
cpus = cpus or multiprocessing.cpu_count()
# TODO propose an automatic number_of_trajectories
self.samples = ms.sample(self.morris_problem,
number_of_trajectories,
num_levels=4)
if chunk_size:
self.chunk_size = chunk_size
else:
self.chunk_size = max(cpus, number_of_trajectories // 100)
pool = multiprocessing.Pool(processes=cpus)
if progressBar:
bar = pyprind.ProgBar(
max(1, math.ceil(len(self.samples) / self.chunk_size)))
chunks = []
scores = [[] for i in range(1 + nb_impacts)]
# store in 'stores' all the mid-point impact
for sample in self.samples:
chunks.append(sample)
if len(chunks) == self.chunk_size:
for i, result_by_impact in enumerate(
map(list, zip(*pool.map(self.single_worker, chunks)))):
scores[i] += result_by_impact
if progressBar:
bar.update()
chunks = []
if len(chunks):
for i, result_by_impact in enumerate(
map(list, zip(*pool.map(self.single_worker, chunks)))):
scores[i] += result_by_impact
if progressBar:
bar.update()
chunks = []
self.scores = scores
return scores
def test_regression_morris_groups(self, set_seed):
set_seed
param_file = 'src/SALib/test_functions/params/Ishigami_groups.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem, N=10000,
num_levels=4,
optimal_trajectories=None)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y,
conf_level=0.95, print_to_console=False,
num_levels=4)
assert_allclose(Si['mu_star'], [7.610322, 10.197014],
atol=0, rtol=1e-5)
def test_regression_morris_groups(self, set_seed):
set_seed
param_file = 'src/SALib/test_functions/params/Ishigami_groups.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem, N=10000,
num_levels=4,
optimal_trajectories=None)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y,
conf_level=0.95, print_to_console=False,
num_levels=4)
assert_allclose(Si['mu_star'], [7.610322, 10.197014],
atol=0, rtol=1e-5)
def generate_samples(model, inputs, kind, N, seed=None, **kwargs):
'''
Generate samples for sensitivity analysis using ``SALib``.
Parameters
----------
model : :class:`biosteam.Model`
Uncertainty model with defined paramters and metrics.
inputs : dict
A dict generated by :func:`~.sensitivity.define_inputs` to be used for ``SALib``,
keys should include "num_vars", "names", and "bounds".
kind : str
Can be "Morris" (for Morris analysis) or "Saltelli" (for Sobol analysis).
N : int
The number of trajectories (Morris) or samples.
seed : int
Seed to generate a random number.
Returns
-------
samples: array
Samples to be used for the indicated sensitivies analyses.
See Also
--------
`SALib.sample.morris <https://salib.readthedocs.io/en/latest/api.html?highlight=morris#method-of-morris>`_
`SALib.sample.saltelli <https://salib.readthedocs.io/en/latest/api/SALib.sample.html?highlight=saltelli#module-SALib.sample.saltelli>`_
'''
params = model.get_parameters()
D = len(params)
if kind.capitalize() == 'Morris':
sample = morris_sampling.sample(inputs, N=N, seed=seed, **kwargs)
for i in range(D):
lower = params[i].distribution.lower[0]
scale = params[i].distribution.upper[0] - lower
sample[:, i] = lower + sample[:, i] * scale
return sample
elif kind.capitalize() == 'Saltelli':
sample = saltelli.sample(inputs, N=N, seed=seed, **kwargs)
for i in range(D):
sample[:, i] = params[i].distribution.inv(sample[:, i])
return sample
else:
raise ValueError('kind can only be "Morris" or "Saltelli", ' \
f'not "{kind}".')
def test_regression_morris_vanilla(self, set_seed):
"""Note that this is a poor estimate of the Ishigami
function.
"""
set_seed
param_file = 'src/SALib/test_functions/params/Ishigami.txt'
problem = read_param_file(param_file)
param_values = sample(problem, 10000, 4,
optimal_trajectories=None)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y,
conf_level=0.95, print_to_console=False,
num_levels=4)
assert_allclose(Si['mu_star'], [7.536586, 7.875, 6.308785],
atol=0, rtol=1e-5)
def test_regression_morris_vanilla(self, set_seed):
"""Note that this is a poor estimate of the Ishigami
function.
"""
set_seed
param_file = 'src/SALib/test_functions/params/Ishigami.txt'
problem = read_param_file(param_file)
param_values = sample(problem, 10000, 4,
optimal_trajectories=None)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y,
conf_level=0.95, print_to_console=False,
num_levels=4)
assert_allclose(Si['mu_star'], [7.536586, 7.875, 6.308785],
atol=0, rtol=1e-5)
def test_regression_morris_groups_local_optim(self, set_seed):
set_seed
param_file = 'src/SALib/test_functions/params/Ishigami_groups.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem, N=500,
num_levels=4,
optimal_trajectories=20,
local_optimization=True)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y,
conf_level=0.95, print_to_console=False,
num_levels=4)
assert_allclose(Si['mu_star'],
[13.95285, 7.875],
rtol=1e-5)
def test_regression_morris_groups_local_optim(self, set_seed):
set_seed
param_file = 'src/SALib/test_functions/params/Ishigami_groups.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem, N=500,
num_levels=4,
optimal_trajectories=20,
local_optimization=True)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y,
conf_level=0.95, print_to_console=False,
num_levels=4)
assert_allclose(Si['mu_star'],
[13.95285, 7.875],
rtol=1e-5)
def test_regression_morris_optimal():
'''
Tests the use of optimal trajectories with Morris.
Note that the relative tolerance is set to a very high value (default is 1e-05)
due to the coarse nature of the num_levels and grid_jump.
'''
param_file = 'SALib/test_functions/params/Ishigami.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem, N=20, \
num_levels=4, grid_jump=2, \
optimal_trajectories=9)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem, param_values, Y,
conf_level=0.95, print_to_console=False,
num_levels=4, grid_jump=2)
assert_allclose(Si['mu_star'], [8.1, 2.2, 5.4], rtol=10)
def sampleMORRIS(num,num_levels,grid_jump,cz):
#read the variable table, "variable"
data_set_temp = np.genfromtxt('./variable.csv',
skip_header=1,
dtype=str,
delimiter=',')
#generate the data set under cz
climate = ['1A','2A','2B','3A','3B','3C','4A','4B','4C','5A','5B','6A','6B','7A','8A']
ind = climate.index(cz)
data_set = []
k = 1
for row in data_set_temp:
temp = [str(k)]
temp.append(row[0])#the measure's name
temp.append(row[1])#the argument's name
temp.append(float(row[ind+2]))#the minimum value
temp.append(float(row[ind+19]))#the maximum value
data_set.append(temp)
k += 1
names = []
bounds = []
for row in data_set:
names.append(row[0])
temp = []
temp.append(row[3])
temp.append(row[4])
bounds.append(temp)
#set the variables and ranges of variables
problem = {
'num_vars': len(data_set),
'names': names,
'bounds': bounds
}
#select the samples
param_values = morris.sample(problem, num, num_levels, grid_jump)
return data_set,problem,param_values
def test_regression_morris_vanilla(self, set_seed):
set_seed
param_file = 'SALib/test_functions/params/Ishigami.txt'
problem = read_param_file(param_file)
param_values = sample(problem=problem,
N=10000,
num_levels=4,
grid_jump=2,
optimal_trajectories=None)
Y = Ishigami.evaluate(param_values)
Si = morris.analyze(problem,
param_values,
Y,
conf_level=0.95,
print_to_console=False,
num_levels=4,
grid_jump=2)
assert_allclose(Si['mu_star'], [7.701555, 7.875, 6.288788],
atol=0,
rtol=1e-5)
def sample(self):
kwargs = {"num_levels": 4}
kwargs.update(self.kwargs)
problem = self.gen_problem_from_data(self.data, self.feature_names)
return morris_sampler.sample(problem, N=self.N, **kwargs)
problem = read_param_file('../../SALib/test_functions/params/Sobol_G.txt')
# or define manually without a parameter file:
# problem = {
# 'num_vars': 3,
# 'names': ['x1', 'x2', 'x3'],
# 'groups': None,
# 'bounds': [[-3.14159265359, 3.14159265359],
# [-3.14159265359, 3.14159265359],
# [-3.14159265359, 3.14159265359]]
# }
# Files with a 4th column for "group name" will be detected automatically, e.g.
# param_file = '../../SALib/test_functions/params/Ishigami_groups.txt'
# Generate samples
param_values = sample(problem, N=1000, num_levels=4,
optimal_trajectories=None)
# To use optimized trajectories (brute force method),
# give an integer value for optimal_trajectories
# Run the "model" -- this will happen offline for external models
Y = Sobol_G.evaluate(param_values)
# Perform the sensitivity analysis using the model output
# Specify which column of the output file to analyze (zero-indexed)
Si = morris.analyze(problem, param_values, Y, conf_level=0.95,
print_to_console=True,
num_levels=4, num_resamples=100)
# Returns a dictionary with keys 'mu', 'mu_star', 'sigma', and 'mu_star_conf'
# e.g. Si['mu_star'] contains the mu* value for each parameter, in the
# same order as the parameter file
[0.87,0.97], # inverter efficienct (%)
[0.5, 24] # dispatch time - hours of the day in which the energy is dispatched
],
# I don't want to group any of these variables together
'groups': None
}
# ### Generate a Sample
#
# We then generate a sample using the `morris.sample()` procedure from the SALib package.
# In[5]:
number_of_trajectories = 1000
sample = ms.sample(morris_problem, number_of_trajectories, num_levels=4, grid_jump=2)
print("The sample array is ",sample.shape)
print("Here are the first 10 rows:")
for j in range(10):
print(' '.join(['{:10.3f}'.format(i) for i in sample[j]]))
# Now we're going to save the parameters to a file, so we can run the jobs separately not in this notebook.
# Because the parameters in the sensitivity analysis problem may not be (in fact *are not*!) in the same order as those expected by the function (this took me a while to notice) we save the column orders into the parameters file as a header.
# In[6]:
header = ' '.join(morris_problem['names'])
np.savetxt("parameter_values.txt", sample, header=header)
problem = read_param_file('../../SALib/test_functions/params/Sobol_G.txt')
# or define manually without a parameter file:
# problem = {
# 'num_vars': 3,
# 'names': ['x1', 'x2', 'x3'],
# 'groups': None,
# 'bounds': [[-3.14159265359, 3.14159265359],
# [-3.14159265359, 3.14159265359],
# [-3.14159265359, 3.14159265359]]
# }
# Files with a 4th column for "group name" will be detected automatically, e.g.:
# param_file = '../../SALib/test_functions/params/Ishigami_groups.txt'
# Generate samples
param_values = sample(problem, N=1000, num_levels=4, grid_jump=2, \
optimal_trajectories=None)
# To use optimized trajectories (brute force method), give an integer value for optimal_trajectories
# Run the "model" -- this will happen offline for external models
Y = Sobol_G.evaluate(param_values)
# Perform the sensitivity analysis using the model output
# Specify which column of the output file to analyze (zero-indexed)
Si = morris.analyze(problem, param_values, Y, conf_level=0.95,
print_to_console=True,
num_levels=4, grid_jump=2, num_resamples=100)
# Returns a dictionary with keys 'mu', 'mu_star', 'sigma', and 'mu_star_conf'
# e.g. Si['mu_star'] contains the mu* value for each parameter, in the
# same order as the parameter file
def sample(self, problem, size):
return morris.sample(problem, size, self.num_levels,
self.optimal_trajectories,
self.local_optimization)
def sa(model, response, policy={}, method="sobol", nsamples=1000, **kwargs):
if len(model.uncertainties) == 0:
raise ValueError("no uncertainties defined in model")
problem = { 'num_vars' : len(model.uncertainties),
'names' : model.uncertainties.keys(),
'bounds' : [[0.0, 1.0] for u in model.uncertainties],
'groups' : kwargs.get("groups", None) }
# estimate the argument N passed to the sampler that produces the requested
# number of samples
N = _predict_N(method, nsamples, problem["num_vars"], kwargs)
# generate the samples
if method == "sobol":
samples = saltelli.sample(problem, N, **_cleanup_kwargs(saltelli.sample, kwargs))
elif method == "morris":
samples = morris_sampler.sample(problem, N, **_cleanup_kwargs(morris_sampler.sample, kwargs))
elif method == "fast":
samples = fast_sampler.sample(problem, N, **_cleanup_kwargs(fast_sampler.sample, kwargs))
elif method == "ff":
samples = ff_sampler.sample(problem, **_cleanup_kwargs(ff_sampler.sample, kwargs))
elif method == "dgsm":
samples = finite_diff.sample(problem, N, **_cleanup_kwargs(finite_diff.sample, kwargs))
elif method == "delta":
if "samples" in kwargs:
samples = kwargs["samples"]
else:
samples = latin.sample(problem, N, **_cleanup_kwargs(latin.sample, kwargs))
# convert from samples in [0, 1] to uncertainty domain
for i, u in enumerate(model.uncertainties):
samples[:,i] = u.ppf(samples[:,i])
# run the model and collect the responses
responses = np.empty(samples.shape[0])
for i in range(samples.shape[0]):
sample = {k : v for k, v in zip(model.uncertainties.keys(), samples[i])}
responses[i] = evaluate(model, overwrite(sample, policy))[response]
# run the sensitivity analysis method
if method == "sobol":
result = sobol.analyze(problem, responses, **_cleanup_kwargs(sobol.analyze, kwargs))
elif method == "morris":
result = morris_analyzer.analyze(problem, samples, responses, **_cleanup_kwargs(morris_analyzer.analyze, kwargs))
elif method == "fast":
result = fast.analyze(problem, responses, **_cleanup_kwargs(fast.analyze, kwargs))
elif method == "ff":
result = ff_analyzer.analyze(problem, samples, responses, **_cleanup_kwargs(ff_analyzer.analyze, kwargs))
elif method == "dgsm":
result = dgsm.analyze(problem, samples, responses, **_cleanup_kwargs(dgsm.analyze, kwargs))
elif method == "delta":
result = delta.analyze(problem, samples, responses, **_cleanup_kwargs(delta.analyze, kwargs))
# convert the SALib results into a form allowing pretty printing and
# lookups using the parameter name
pretty_result = SAResult(result["names"] if "names" in result else problem["names"])
if "S1" in result:
pretty_result["S1"] = {k : float(v) for k, v in zip(problem["names"], result["S1"])}
if "S1_conf" in result:
pretty_result["S1_conf"] = {k : float(v) for k, v in zip(problem["names"], result["S1_conf"])}
if "ST" in result:
pretty_result["ST"] = {k : float(v) for k, v in zip(problem["names"], result["ST"])}
if "ST_conf" in result:
pretty_result["ST_conf"] = {k : float(v) for k, v in zip(problem["names"], result["ST_conf"])}
if "S2" in result:
pretty_result["S2"] = _S2_to_dict(result["S2"], problem)
if "S2_conf" in result:
pretty_result["S2_conf"] = _S2_to_dict(result["S2_conf"], problem)
if "delta" in result:
pretty_result["delta"] = {k : float(v) for k, v in zip(problem["names"], result["delta"])}
if "delta_conf" in result:
pretty_result["delta_conf"] = {k : float(v) for k, v in zip(problem["names"], result["delta_conf"])}
if "vi" in result:
pretty_result["vi"] = {k : float(v) for k, v in zip(problem["names"], result["vi"])}
if "vi_std" in result:
pretty_result["vi_std"] = {k : float(v) for k, v in zip(problem["names"], result["vi_std"])}
if "dgsm" in result:
pretty_result["dgsm"] = {k : float(v) for k, v in zip(problem["names"], result["dgsm"])}
if "dgsm_conf" in result:
pretty_result["dgsm_conf"] = {k : float(v) for k, v in zip(problem["names"], result["dgsm_conf"])}
if "mu" in result:
pretty_result["mu"] = {k : float(v) for k, v in zip(result["names"], result["mu"])}
if "mu_star" in result:
pretty_result["mu_star"] = {k : float(v) for k, v in zip(result["names"], result["mu_star"])}
if "mu_star_conf" in result:
pretty_result["mu_star_conf"] = {k : float(v) for k, v in zip(result["names"], result["mu_star_conf"])}
if "sigma" in result:
pretty_result["sigma"] = {k : float(v) for k, v in zip(result["names"], result["sigma"])}
return pretty_result
