def f_p_I(s=0.465, loc=0, scale=5.5, fst_q=0.0001, lst_q=0.9999):
st = lognorm.ppf(fst_q, s, scale=scale)
nd = lognorm.ppf(lst_q, s, scale=scale)
x_cont = np.linspace(st, nd, 100)
lognm_pdf = lognorm.pdf(x_cont, s, loc, scale)
# convertimos a una lista de enteros con índices los días y
# las entradas los valores de la probabilidad
# prob_days[i] = sum ( lognm_pdf[j] | x_cont[j] = i div) / cont
prob_days = []
i = 0
sm = 0
cont = 0
for j in range(len(x_cont)):
# función monótona creciente
if i <= x_cont[j] < i + 1:
sm += lognm_pdf[j]
cont += 1
else:
prob_days.append(sm / cont)
i += 1
cont = 1
sm = lognm_pdf[j]
# la última prob se debe anexar al terminar de ejecutarse el código
prob_days.append(sm / cont)
return prob_days
def calculate_linspace(distribution):
if distribution[0] == 'EXP':
lambda_ = distribution[1]
scale_ = 1 / lambda_
return np.linspace(expon.ppf(0.001, scale=scale_),
expon.ppf(0.999, scale=scale_), 1000)
if distribution[0] == 'WEIBULL':
scale = distribution[1]
shape = distribution[2]
return np.linspace(weibull_min.ppf(0.001, shape, loc=0, scale=scale),
weibull_min.ppf(0.999, shape, loc=0, scale=scale),
1000)
if distribution[0] == 'NORMAL':
mu = distribution[1]
sigma = distribution[2]
return np.linspace(norm.ppf(0.001, loc=mu, scale=sigma),
norm.ppf(0.999, loc=mu, scale=sigma), 1000)
if distribution[0] == 'LOGNORM':
mu = distribution[1]
sigma = distribution[2]
scale = math.exp(mu)
return np.linspace(lognorm.ppf(0.001, sigma, loc=0, scale=scale),
lognorm.ppf(0.999, sigma, loc=0, scale=scale), 1000)
else:
return np.linspace(0, 100, 1000)
def save_csd(fname, diam, shape, scale, show_plot=False):
"""Save cell size distribution plot.
Creates files ``*.Packing_histogram.png`` and ``*.Packing_histogram.pdf``
with cell size distribution histogram and continual probability density
function.
Args:
fname (str): base filename
diam (ndarray): array of sphere diameters
shape (float): shape size parameter of log-normal distribution
scale (float): scale size parameter of log-normal distribution
show_plot (bool, optional): create window with plot
"""
if shape == 0:
xpos = np.linspace(scale / 2, scale * 2, 100)
else:
xpos = np.linspace(lognorm.ppf(0.01, shape, scale=scale),
lognorm.ppf(0.99, shape, scale=scale), 100)
plt.figure(figsize=(12, 8))
plt.rcParams.update({'font.size': 16})
plt.plot(xpos, lognorm.pdf(xpos, shape, scale=scale), lw=3, label='input')
plt.hist(diam, density=True, label='spheres')
plt.grid()
plt.xlabel('Size')
plt.ylabel('Probability density function')
plt.legend()
plt.savefig(fname + 'Packing_histogram.png', dpi=300)
plt.savefig(fname + 'Packing_histogram.pdf')
if show_plot:
plt.show()
def kinetic_dispersion(self):
#print self.nd_param.k0_shape, self.nd_param.k0_loc, self.nd_param.k0_scale
k0_weights=np.zeros(self.simulation_options["dispersion_bins"])
k_start=lognorm.ppf(0.0001, self.nd_param.k0_shape, loc=self.nd_param.k0_loc, scale=self.nd_param.k0_scale)
k_end=lognorm.ppf(0.9999, self.nd_param.k0_shape, loc=self.nd_param.k0_loc, scale=self.nd_param.k0_scale)
k0_vals=np.linspace(k_start,k_end, self.simulation_options["dispersion_bins"])
k0_weights[0]=lognorm.cdf(k0_vals[0], self.nd_param.k0_shape, loc=self.nd_param.k0_loc, scale=self.nd_param.k0_scale)
for k in range(1, len(k0_weights)):
k0_weights[k]=lognorm.cdf(k0_vals[k], self.nd_param.k0_shape, loc=self.nd_param.k0_loc, scale=self.nd_param.k0_scale)-lognorm.cdf(k0_vals[k-1], self.nd_param.k0_shape, loc=self.nd_param.k0_loc, scale=self.nd_param.k0_scale)
#plt.plot(k0_vals, k0_weights)
#plt.title("k0")
#plt.show()
return k0_vals, k0_weights
def create_fragility_curve(x, filter_by):
sigma = 0
mu = 0
s = sigma
x = np.arange(0, 200, 1)
scale = exp(mu)
lognorm.pdf(x, s, scale)
x = np.linspace(0, 6, 200)
#plt.plot(x, dist.pdf(x))
#plt.plot(x, dist.cdf(x))
# Display the lognormal distribution:
x = np.linspace(lognorm.ppf(0.01, s), lognorm.ppf(0.99, s), 100)
ax = plt.axes()
ax.plot(x, lognorm.pdf(x, s), 'r-', lw=5, alpha=0.6, label='lognorm pdf')
def test_fa(self):
T = 10
q = generic.fa(self.da, T, 'lognorm')
p0 = lognorm.fit(self.da.values[:, 0, 0])
q0 = lognorm.ppf(1 - 1. / T, *p0)
np.testing.assert_array_equal(q[0, 0, 0], q0)
def GetFirmSize(self):
if float(self.lstDev) > 0:
if self.distNorm==True:
firmsize = float(norm.ppf(float(self.FindURandom()),scale=float(self.lstDev),loc=float(self.averageFirmSize)))
else:
firmsize = float(lognorm.ppf(float(self.FindURandom()),float(self.lstDev)/float(self.averageFirmSize),scale=float(self.averageFirmSize)))
if math.isinf(firmsize) == True:
firmsize = 0
logging.info("Infinity encountered")
else:
firmsize = self.averageFirmSize
if self.roundval=='floor':
firmsize = np.floor(firmsize)
elif self.roundval=='ceil':
firmsize = np.ceil(firmsize)
elif self.roundval=='tenths':
firmsize = np.round(firmsize,1)
elif self.roundval==True:
firmsize = np.round(firmsize)
if firmsize > 0:
return firmsize
else:
return 0
def GetFirmSize(self):
if float(self.lstDev) > 0:
if self.distNorm == True:
firmsize = float(
norm.ppf(float(self.FindURandom()),
scale=float(self.lstDev),
loc=float(self.averageFirmSize)))
else:
firmsize = float(
lognorm.ppf(float(self.FindURandom()),
float(self.lstDev) /
float(self.averageFirmSize),
scale=float(self.averageFirmSize)))
if math.isinf(firmsize) == True:
firmsize = 0
logging.info("Infinity encountered")
else:
firmsize = self.averageFirmSize
if self.roundval == 'floor':
firmsize = np.floor(firmsize)
elif self.roundval == 'ceil':
firmsize = np.ceil(firmsize)
elif self.roundval == 'tenths':
firmsize = np.round(firmsize, 1)
elif self.roundval == True:
firmsize = np.round(firmsize)
if firmsize > 0:
return firmsize
else:
return 0
def cvar(self, alph):
mu = self.mu
sigma = self.sigma
q = lognorm.ppf(alph, sigma, 0, np.exp(mu))
a = norm.cdf((mu+sigma**2-np.log(q))/sigma)
b = 1 - norm.cdf((np.log(q)-mu)/sigma)
return np.exp(mu + sigma**2/2) * a/b
def ppf(self, q):
"""
Percentile function (inverse cumulative distribution function)
:param q: np.ndarray, quantiles to evaluate
:return: np.ndarray, quantiles
"""
return lognorm.ppf(q, self.mu, self.eta)
def VaR_alpha(alpha, parametros):
if(parametros[0] == "gennormal"):
from scipy.stats import gennorm
VaR = gennorm.ppf(alpha,parametros[1],parametros[2])
elif(parametros[0] == "normal"):
from scipy.stats import norm
VaR = norm.ppf(alpha,parametros[1],parametros[2])
elif(parametros[0] == "gamma"):
from scipy.stats import gamma
VaR = gamma.ppf(alpha,parametros[1],scale=parametros[2])
elif(parametros[0] == "pareto"):
from scipy.stats import pareto
VaR = pareto.ppf(q=alpha,b=parametros[1],scale=parametros[2])
elif(parametros[0] == "weibull"):
from scipy.stats import weibull
VaR = weibull.ppf(q=alpha,b=parametros[1],scale=parametros[2])
else: #(parametros[0] == "lognorm"):
from scipy.stats import lognorm
VaR = lognorm.ppf(q=alpha,b=parametros[1],scale=parametros[2])
return VaR
def _get_boundaries_through_warping(
self, max_batch_length: int, num_quantiles: int,
) -> List[int]:
# NOTE: the following lines do not cover that there is only one example in the dataset
# warp frames (duration) distribution of train data
logger.info("Batch quantisation in latent space")
# linspace set-up
num_boundaries = num_quantiles + 1
# create latent linearly equal spaced buckets
latent_boundaries = np.linspace(
1 / num_boundaries, num_quantiles / num_boundaries, num_quantiles,
)
# get quantiles using lognormal distribution
quantiles = lognorm.ppf(latent_boundaries, 1)
# scale up to to max_batch_length
bucket_boundaries = quantiles * max_batch_length / quantiles[-1]
# compute resulting bucket length multipliers
length_multipliers = [
bucket_boundaries[x + 1] / bucket_boundaries[x]
for x in range(num_quantiles - 1)
]
# logging
logger.info(
"Latent bucket boundary - buckets: {} - length multipliers: {}".format(
list(map("{:.2f}".format, bucket_boundaries)),
list(map("{:.2f}".format, length_multipliers)),
)
)
return list(sorted(bucket_boundaries))
def CDFm(data,
nPoint,
dist='normal',
mu=0,
sigma=1,
analitica=False,
lim=None):
import numpy as np
from scipy.interpolate import interp1d
from statsmodels.distributions import ECDF
from scipy.stats import norm, lognorm
eps = 5e-5
y = np.linspace(eps, 1 - eps, nPoint)
if not analitica:
ecdf = ECDF(data)
xest = np.linspace(lim[0], lim[1], int(100e3))
yest = ecdf(xest)
interp = interp1d(yest, xest, fill_value='extrapolate', kind='nearest')
x = interp(y)
else:
if dist == 'normal':
x = norm.ppf(y, loc=mu, scale=sigma)
elif dist == 'lognormal':
x = lognorm.ppf(y, sigma, loc=0, scale=np.exp(mu))
return x
def score_from_sample(lca,sobol_sample):
vector = lca.tech_params['amount']
q = (q_high-q_low)*sobol_sample[:n_normal] + q_low
params_normal_new = norm.ppf(q,loc=params_normal['loc'],scale=params_normal['scale'])
np.put(vector,indices_normal,params_normal_new)
del q
q = sobol_sample[n_normal:n_normal+n_triang]
loc = params_triang['minimum']
scale = params_triang['maximum']-params_triang['minimum']
c = (params_triang['loc']-loc)/scale
params_triang_new = triang.ppf(q,c=c,loc=loc,scale=scale)
np.put(vector,indices_triang,params_triang_new)
del q
#TODO implement group sampling
# q = (q_high-q_low)*samples[:,:n_lognor] + q_low
q = (q_high-q_low)*np.random.rand(n_lognor) + q_low
params_lognor_new = lognorm.ppf(q,s=params_lognor['scale'],scale=np.exp(params_lognor['loc']))
np.put(vector,indices_lognor,params_lognor_new)
lca.rebuild_technosphere_matrix(vector)
score = (cB*spsolve(lca.technosphere_matrix,d))[0]
return score
def test_fa(self):
T = 10
q = generic.fa(self.da, T, "lognorm")
assert "return_period" in q.coords
p0 = lognorm.fit(self.da.values[:, 0, 0])
q0 = lognorm.ppf(1 - 1.0 / T, *p0)
np.testing.assert_array_equal(q[0, 0, 0], q0)
def plot_bias():
for sampl in np.arange(10, 45, 5):
errs = []
ests = []
real_val = lognorm.ppf(0.5, 1, 0)
for _ in range(100000):
x = lognorm.rvs(1, 0, size=sampl)
#est_val = estimate_median(x)
est_val = np.median(x)
err = (real_val - est_val) / real_val
errs.append(err)
ests.append(est_val)
print(np.mean(errs))
plt.hist(ests, bins=np.arange(0, 4, .1))
plt.axvline(real_val, label="actual median", color="black")
plt.axvline(np.mean(ests),
label="avg estimated value of median on sample size: " +
str(sampl),
color="purple")
plt.axvline(np.median(ests),
label="median estimated value of median on sample size: " +
str(sampl),
color="orange")
plt.legend()
plt.title("Sample size = " + str(sampl))
plt.savefig('plots/sample_' + str(sampl) + '.png')
plt.close()
print('processed sample size ' + str(sampl))
def lowerThreshold(self, distribution, specification, tail_probability) :
if distribution == 'normal' :
mean = specification['mean']
std_dev = specification['std_dev']
return norm.ppf(tail_probability, loc=mean, scale=std_dev)
elif distribution == 'lognormal' :
lower = specification['lower']
scale = specification['scale']
sigma = specification['sigma']
return lognorm.ppf(tail_probability, sigma, loc=lower, scale=scale)
def make_csd(shape, scale, npart, show_plot=False):
"""Create cell size distribution and save it to file."""
if shape == 0:
rads = [scale + 0 * x for x in range(npart)]
else:
rads = lognorm.rvs(shape, scale=scale, size=npart)
with open('diameters.txt', 'w') as fout:
for rad in rads:
fout.write('{0}\n'.format(rad))
if shape == 0:
xpos = linspace(scale / 2, scale * 2, 100)
else:
xpos = linspace(lognorm.ppf(0.01, shape, scale=scale),
lognorm.ppf(0.99, shape, scale=scale), 100)
plt.plot(xpos, lognorm.pdf(xpos, shape, scale=scale))
plt.hist(rads, normed=True)
plt.savefig('packing_histogram.png')
plt.savefig('packing_histogram.pdf')
if show_plot:
plt.show()
def make_csd(shape, scale, npart, show_plot=False):
"""Create cell size distribution and save it to file."""
if shape == 0:
rads = [scale + 0 * x for x in range(npart)]
else:
rads = lognorm.rvs(shape, scale=scale, size=npart)
with open('diameters.txt', 'w') as fout:
for rad in rads:
fout.write('{0}\n'.format(rad))
if shape == 0:
xpos = linspace(scale / 2, scale * 2, 100)
else:
xpos = linspace(lognorm.ppf(0.01, shape, scale=scale),
lognorm.ppf(0.99, shape, scale=scale), 100)
plt.plot(xpos, lognorm.pdf(xpos, shape, scale=scale))
plt.hist(rads, normed=True)
plt.savefig('packing_histogram.png')
plt.savefig('packing_histogram.pdf')
if show_plot:
plt.show()
def convert_sample_to_lognor(params,sample): """ Convert uniform in [0,1] to LOGNORMAL distribution """ #Make sure all parameters have proper distributions assert np.all(params['uncertainty_type'] == ID_LOGNOR) q = (Q_HIGH-Q_LOW)*sample + Q_LOW params_converted = lognorm.ppf(q,s=params['scale'],scale=np.exp(params['loc'])) params_converted *= np.sign(params['amount']) return params_converted
def Dist(stvars, value, inpt):
v = zeros(inpt)
for j in range(inpt):
if stvars[j].dist == 'NORM':
v[j] = norm.ppf(norm.cdf(value[j], 0, 1), stvars[j].param[0], stvars[j].param[1])
elif stvars[j].dist == 'LNORM':
v[j] = lognorm.ppf(norm.cdf(value[j], 0, 1), stvars[j].param[1], 0, exp(stvars[j].param[0]))
elif stvars[j].dist == 'BETA':
v[j] = beta.ppf(norm.cdf(value[j], 0, 1), stvars[j].param[0], stvars[j].param[1], stvars[j].param[2], stvars[j].param[3] - stvars[j].param[2])
elif stvars[j].dist == 'UNIF':
v[j] = uniform.ppf(norm.cdf(value[j], 0, 1), stvars[j].param[0], stvars[j].param[1])
return v
def plot(self, num=1000, axes=None) -> list:
"""
A method to plot the impact
"""
x = np.linspace(
lognorm.ppf(0.001,
s=self.data["sigma"],
scale=np.exp(self.data["mu"])),
lognorm.ppf(0.999,
s=self.data["sigma"],
scale=np.exp(self.data["mu"])),
num,
)
plt.title("%s (PDF)" % (self.data["name"]))
plt.ylabel("relative likelihood")
plt.xlabel("impact")
return plt.plot(
x,
lognorm.pdf(x, s=self.data["sigma"],
scale=np.exp(self.data["mu"])),
axes=axes,
)
def evaluate_lognormal(self, iterations: int = 1000) -> float:
reduction = np.product(
list(
map(
lambda x: x["reduction"]
if x["implemented"] is True else 1,
self.data["vulnerability"]["controls"],
)))
return lognorm.ppf(
np.random.rand(iterations),
s=self.data["impact"]["sigma"],
scale=np.exp(self.data["impact"]["mu"]),
) * np.random.poisson(lam=self.data["likelihood"]["lam"] * reduction,
size=iterations)
def generateLatinHypercubeSampledMultipliers(self, specification_map, number_samples) :
# Construct sets of random sampled multipliers from the selected distribution for each parameter
multiplier_sets = {}
for key, specification in specification_map.items() :
# Generate stratified random probability values for distribution generation via inverse CDF
stratified_random_probabilities = ((np.array(range(number_samples)) + np.random.random(number_samples))/number_samples)
# Use stratified random probability values to generate stratified samples from selected distribution via inverse CDF
distribution = specification['distribution']
if distribution == 'uniform' :
lower = specification['settings']['lower']
base = specification['settings']['upper'] - lower
multiplier_sets[key] = uniform.ppf(stratified_random_probabilities, loc=lower, scale=base).tolist()
elif distribution == 'normal' :
mean = specification['settings']['mean']
std_dev = specification['settings']['std_dev']
multiplier_sets[key] = norm.ppf(stratified_random_probabilities, loc=mean, scale=std_dev).tolist()
elif distribution == 'triangular' :
a = specification['settings']['a']
base = specification['settings']['b'] - a
c_std = (specification['settings']['c'] - a)/base
multiplier_sets[key] = triang.ppf(stratified_random_probabilities, c_std, loc=a, scale=base).tolist()
elif distribution == 'lognormal' :
lower = specification['settings']['lower']
scale = specification['settings']['scale']
sigma = specification['settings']['sigma']
multiplier_sets[key] = lognorm.ppf(stratified_random_probabilities, sigma, loc=lower, scale=scale).tolist()
elif distribution == 'beta' :
lower = specification['settings']['lower']
base = specification['settings']['upper'] - lower
a = specification['settings']['alpha']
b = specification['settings']['beta']
multiplier_sets[key] = beta.ppf(stratified_random_probabilities, a, b, loc=lower, scale=base).tolist()
# Randomly select from sampled multiplier sets without replacement to form multipliers (dictionaries)
sampled_multipliers = []
for i in range(number_samples) :
sampled_multiplier = {}
for key, multiplier_set in multiplier_sets.items() :
random_index = np.random.randint(len(multiplier_set))
sampled_multiplier[key] = multiplier_set.pop(random_index)
sampled_multipliers.append(sampled_multiplier)
return sampled_multipliers
def Dist(stvars, value, inpt):
v = zeros(inpt)
for j in range(inpt):
if stvars[j].dist == 'NORM':
v[j] = norm.ppf(norm.cdf(value[j], 0, 1), stvars[j].param[0],
stvars[j].param[1])
elif stvars[j].dist == 'LNORM':
v[j] = lognorm.ppf(norm.cdf(value[j], 0, 1), stvars[j].param[1], 0,
exp(stvars[j].param[0]))
elif stvars[j].dist == 'BETA':
v[j] = beta.ppf(norm.cdf(value[j], 0, 1), stvars[j].param[0],
stvars[j].param[1], stvars[j].param[2],
stvars[j].param[3] - stvars[j].param[2])
elif stvars[j].dist == 'UNIF':
v[j] = uniform.ppf(norm.cdf(value[j], 0, 1), stvars[j].param[0],
stvars[j].param[1])
return v
def solve_integral_lognormal(rho, sigma2=1):
if rho >= 1.0:
rho = 0.9999
nhg = 30
x, w = N.polynomial.hermite.hermgauss(nhg)
Sigma = sigma2 * N.array([[1., rho], [rho, 1.]])
Nd = 2
const = N.pi**(-0.5 * Nd)
# gaussian variable
xn = N.array(list(itertools.product(*(x, ) * Nd)))
# gauss hermite weights
wn = N.prod(N.array(list(itertools.product(*(w, ) * Nd))), 1)
# normalized diagonal variables
yn = 2.0**0.5 * N.dot(N.linalg.cholesky(Sigma), xn.T).T
#scipy gaussian cdf
yn = norm.cdf(yn, scale=N.sqrt(sigma2))
# lognormal ppf. loc and s are the means and sigma of the gaussian that produce the lognormal
gn = lognorm.ppf(yn, s=N.sqrt(sigma2), loc=0.0, scale=1.0)
# to have Coles and jones
gn *= N.exp(-sigma2 / 2.)
gn -= 1.
gn = N.prod(gn, 1)
if not N.all(N.isfinite(gn)):
gn[N.where(N.isinf(gn))] = 0.
#assert 0
corr = N.sum((wn * const) * gn)
return corr
def mse():
"""Compute MSE of quantiles from the distributions.
Returns:
(dict): MSEs of `lognorm`, `gamma`, `weibull` and `erlang` in a dict.
"""
# quantiles
quantile_points = [.05,.25,.5,.75,.95]
def _qMSE(q):
return np.mean((q - np.array([2.2,3.8,5.1,6.7,11.5]))**2)
# distributions
distr = continuous()
lognorm_quantiles = lognorm.ppf(quantile_points, *distr['lognorm'])
gamma_quantiles = gamma.ppf(quantile_points, *distr['gamma'])
weibull_quantiles = weibull.ppf(quantile_points, *distr['weibull'])
erlang_quantiles = erlang.ppf(quantile_points, *distr['erlang'])
# MSE
return {
'lognorm': _qMSE(lognorm_quantiles),
'gamma': _qMSE(gamma_quantiles),
'weibull': _qMSE(weibull_quantiles),
'erlang': _qMSE(erlang_quantiles)
}
def gammalognorm(rho):
l = 3
a = 6.7
N = 100000
miu = np.array([0 , 0])
corr = np.array([[1, rho],[rho, 1]])
Z = np.random.multivariate_normal(miu, corr, N)
U = norm.cdf(Z)
X = gamma.ppf(U[:, 0], a, l)
Y = lognorm.ppf(U[:, 1], 0.1, 0.05)
corre = np.corrcoef(X,Y)
plot1 = plt.subplot2grid((2, 2), (1, 0))
plot2 = plt.subplot2grid((2, 2), (0, 0), colspan = 2)
plot3 = plt.subplot2grid((2, 2), (1, 1))
plot1.plot(X,Y, '.')
plot2.hist(X, bins=30)
plot3.hist(Y, bins=30, orientation = 'horizontal')
plot2.set_title('Case 2, rho={}'.format(rho))
plt.show()
print("Case2, rho=", rho,"\n",corre[0][1])
def get_baseline_lognormal(alpha, shape, technique, int_options):
""" Get the expected returns by drawing numerous random deviates from a
lognormal distribution.
"""
# Guard interface.
args = (alpha, shape, technique, int_options)
assert basic_checks('get_baseline_lognormal', 'in', args)
# Construct bounds based on quantiles of lognormal distribution.
lower, upper = EPS, lognorm.ppf(0.9999999, shape)
# Prepare wrapper for alternative integration strategies.
func = partial(_wrapper_baseline, alpha, shape)
# Perform native monte carlo integration.
if technique == 'naive_mc':
# Distribute relevant integration options.
implementation = int_options['naive_mc']['implementation']
num_draws = int_options['naive_mc']['num_draws']
seed = int_options['naive_mc']['seed']
# Perform naive Monte Carlo integration.
rslt = naive_monte_carlo(func, (lower, upper), num_draws,
implementation, seed)
elif technique == 'quad':
# Perform integration based on quadrature.
rslt = scipy_quad(func, (lower, upper))
elif technique == 'romberg':
# Perform integration based on Romberg.
rslt = scipy_romberg(func, (lower, upper))
else:
pass
# Check result.
assert basic_checks('get_baseline_lognormal', 'out', rslt)
# Finishing
return rslt
def solve_integral(self, rho, sigma2):
if rho >= 1.0:
rho = 1 - 1e-08
nhg = 30
x, w = N.polynomial.hermite.hermgauss(nhg)
Sigma = sigma2 * N.array([[1., rho], [rho, 1.]])
Nd = 2
const = N.pi**(-0.5 * Nd)
# gaussian variable
xn = N.array(list(itertools.product(*(x, ) * Nd)))
# gauss hermite weights
wn = N.prod(N.array(list(itertools.product(*(w, ) * Nd))), 1)
# normalized diagonal variables
yn = 2.0**0.5 * N.dot(N.linalg.cholesky(Sigma), xn.T).T
yn = norm.cdf(yn, loc=0., scale=N.sqrt(sigma2))
gn = lognorm.ppf(yn, s=N.sqrt(sigma2), loc=0.0, scale=1.0)
# Eq. 16
gn *= N.exp(-sigma2 / 2.)
gn -= 1.
gn = N.prod(gn, 1)
if not N.all(N.isfinite(gn)):
gn[N.where(N.isinf(gn))] = 0.
z = N.sum((wn * const) * gn, axis=0)
return z
def aleform():
form = Ale_form()
if request.method == "POST" and form.validate_on_submit():
#obesity
weight = float(form.weight.data)
height = float(form.height.data)
bmi = float(weight / height**2)
#bmi distribution
percentilbmi = lognorm.cdf([bmi], 0.1955, -10, 25.71)
#value in the obesity county distr
val_obse = lognorm.ppf([percentilbmi], 0.0099, -449.9, 474.25)
#diabetes
diabetes = float(form.diabetes.data)
val_dia = lognorm.ppf([diabetes], 0.164, -7.143, 14.58)
#smokers
smoke = float(form.smoke.data)
#number of cigarretes distribution
percentilcigars = lognorm.cdf([smoke], 0.506, 0, 2.29)
#value in the smoker county distribution
val_smoke = lognorm.ppf([percentilcigars], 0.062, -65.19, 88.55)
#exercise
exercise = float(form.exercise.data)
val_exer = lognorm.ppf([exercise], 0.105, -36.41, 62.65)
#hsdiploma
hsdiploma = float(form.hsdiploma.data)
val_dip = lognorm.ppf([hsdiploma], 0.208, -11.3, 24.59)
#poverty
poverty = float(form.poverty.data)
val_pov = lognorm.ppf([poverty], 0.279, -3.594, 15.76)
out_person = [val_exer, val_obse, val_smoke, val_dia, val_pov, val_dip]
# out_person=[35.41,39,42,17,33.7,35.4] #lo mas bajo
#out_person=[8,10,7.9,1.64,3.0,1.6] #lo mas alto
#out_person=[35,15,25.5,30.5,45.5,45.5]#example,building the web
x_predict = np.array(out_person).reshape(1, -1)
result = model_predict.predict(x_predict)
result = str(result)
#return result
return render_template('predict_ale.html', result=result)
# return redirect(url_for('predict_ale',out_person=out_person))
return render_template('longevityform.html', title='LONGEVITY', form=form)
def ppf_fn2(q):
return lognorm.ppf(q, 1, 0)
def SA_SOBOL(driver):
# Uses the Sobel Method for SA.
# Input:
# inpt : no. of input factors
# N: number of Sobel samples
#
# Output:
# SI[] : sensitivity indices
# STI[] : total effect sensitivity indices
# Other used variables/constants:
# V : total variance
# VI : partial variances
# ---------------------- Setup ---------------------------
methd = 'SOBOL'
method = '7'
mu = [inp.get_I_mu() for inp in driver.inputs]
I_sigma = [inp.get_I_sigma() for inp in driver.inputs]
inpt = len(driver.inputs)
input = driver.inputNames
krig = driver.krig
limstate= driver.limstate
lrflag = driver.lrflag
n_meta = driver.n_meta
nEFAST = driver.nEFAST
nSOBOL = driver.nSOBOL
nMCS = driver.nMCS
nodes = driver.nodes
order = driver.order
otpt = len(driver.outputNames)
output = driver.outputNames
p = driver.p
plotf = 0
r = driver.r
simple = driver.simple
stvars = driver.stvars
# ---------------------- Model ---------------------------
value = asarray(LHS.LHS(2*inpt, nSOBOL))
for j in range(inpt):
if stvars[j].dist == 'NORM':
value[:,j] = norm.ppf(uniform.cdf(value[:,j], 0, 1), stvars[j].param[0], stvars[j].param[1])
value[:,j+inpt] = norm.ppf(uniform.cdf(value[:,j+inpt], 0, 1), stvars[j].param[0], stvars[j].param[1])
elif stvars[j].dist == 'LNORM':
value[:,j] = lognorm.ppf(uniform.cdf(value[:, j], 0, 1), stvars[j].param[1], 0, exp(stvars[j].param[0]))
value[:,j+inpt] = lognorm.ppf(uniform.cdf(value[:, j+inpt], 0, 1), stvars[j].param[1], 0, exp(stvars[j].param[0]))
elif stvars[j].dist == 'BETA':
value[:,j] = beta.ppf(uniform.cdf(value[:, j], 0, 1), stvars[j].param[0], stvars[j].param[1], stvars[j].param[2], stvars[j].param[3] - stvars[j].param[2])
value[:,j+inpt] = beta.ppf(uniform.cdf(value[:, j+inpt], 0, 1), stvars[j].param[0], stvars[j].param[1], stvars[j].param[2], stvars[j].param[3] - stvars[j].param[2])
elif stvars[j].dist == 'UNIF':
value[:,j] = uniform.ppf(uniform.cdf(value[:,j], 0, 1), stvars[j].param[0], stvars[j].param[1])
value[:,j+inpt] = uniform.ppf(uniform.cdf(value[:,j+inpt], 0, 1), stvars[j].param[0], stvars[j].param[1])
values = []
XMA = value[0:nSOBOL, 0:inpt]
XMB = value[0:nSOBOL, inpt:2 * inpt]
YXMA = zeros((nSOBOL, otpt))
YXMB = zeros((nSOBOL, otpt))
if krig == 1:
load("dmodel")
YXMA = predictor(XMA, dmodel)
YXMB = predictor(XMB, dmodel)
else:
values.extend(list(XMA))
values.extend(list(XMB))
YXMC = zeros((inpt, nSOBOL, otpt))
for i in range(inpt):
XMC = deepcopy(XMB)
XMC[:, i] = deepcopy(XMA[:, i])
if krig == 1:
YXMC[i] = predictor(XMC, dmodel)
else:
values.extend(list(XMC))
if krig != 1:
out = iter(run_list(driver, values))
for i in range(nSOBOL):
YXMA[i] = out.next()
for i in range(nSOBOL):
YXMB[i] = out.next()
for i in range(inpt):
for j in range(nSOBOL):
YXMC[i, j] = out.next()
f0 = mean(YXMA,0)
if otpt==1:
V = cov(YXMA,None,0,1)
else: #multiple outputs
V = diag(cov(YXMA,None,0,1))
Vi = zeros((otpt, inpt))
Vci = zeros((otpt, inpt))
for i in range(inpt):
for p in range(otpt):
Vi[p,i] = 1.0/nSOBOL*sum(YXMA[:,p]*YXMC[i,:,p])-f0[p]**2;
Vci[p,i]= 1.0/nSOBOL*sum(YXMB[:,p]*YXMC[i,:,p])-f0[p]**2;
Si = zeros((otpt,inpt));
Sti = zeros((otpt,inpt));
for j in range(inpt):
Si[:, j] = Vi[:, j] / V
Sti[:, j] = 1 - Vci[:, j] / V
if lrflag == 1:
SRC, stat = SRC_regress.SRC_regress(XMA, YXMA, otpt, nSOBOL)
# ---------------------- Analyze ---------------------------
Results = {'FirstOrderSensitivity': Si, 'TotalEffectSensitivity': Sti}
if lrflag == 1:
Results.update({'SRC': SRC, 'R^2': stat})
return Results
def Finv_Lognormal(r, m, s):
sln, mln = p_Lognormal(m, s)
return lognorm.ppf(r, sln, 0, np.exp(mln))
def __init__(
self,
T: float,
rho: float, # = discount rate
rf: float, # = risk-free rate
mu: float, # = risky rate means
sigma_sq: float, # = risky rate var
sigma: float, # = risky sd
gamma: float, # = CRRA parameter
min_num_states: int, # = discreteness of state space
wealth_steps: float, # = space between wealth states
num_actions: int, # = discretenes of action space
action_range: Tuple[float, float], # = range of actions
W_0: float # = starting wealth
) -> None:
""" Constructor
1) initalize the variables
2) set up the granularity of the state and action space
"""
#set up the member variables
self.T = T
self.rho = rho
self.rf = rf
self.mu = mu
self.sigma_sq = sigma_sq
self.sigma = np.sqrt(sigma_sq)
self.gamma = gamma
self.action_range = action_range
#self.num_states = num_states
self.num_actions = action_range
#discretize the action space
self.A_set = np.linspace(action_range[0], action_range[1], num_actions)
##### discretize the state space #######
#TODO CHANGE TO LOWER BOUND THE WEALTH ALSO
#decide how to discretize wealth
#cap the max wealth, function of variance and time
#varT = self.sigma * self.T
#sd_end = np.sqrt(varT)
##TRY 1
sd_end = np.sqrt(sigma_sq) * np.sqrt(self.T)
print("sd_end: {}".format(sd_end))
# print("sd_end {}".format(sd_end))
# max_wealth = W_0 + int(4*sd_end * W_0) #KEY VARIABLE, RANGE OF WEALTH STATES
# min_wealth = max(0,W_0 - (max_wealth - W_0))
##TRY2
max_wealth = W_0 * lognorm.ppf(.9995, s=sd_end)
min_wealth = W_0 * lognorm.ppf(.0005, s=sd_end)
W_states_count = int(
np.max(np.array([min_num_states, max_wealth / wealth_steps])))
#set up state matrix
self.S_rows = np.arange(0, T + 1)
self.S_cols = np.linspace(min_wealth, max_wealth, W_states_count)
#print("min wealth {} max wealth {}".format(min_wealth,max_wealth))
#print("S_cols 1 {}".format(self.S_cols))
self.S_value = np.zeros((self.S_rows.size, self.S_cols.size))
self.gap = self.S_cols[1] - self.S_cols[0]
self.max_wealth = int(self.S_cols[-1:])
self.min_wealth = int(self.S_cols[0])
self.num_wealth_states = int(self.S_cols.size)
#print( [(W,a) for W,a in product(self.S_cols , self.A_set) ])
#precompute the transition probabilties
self.trans_probs = np.array([
np.array([self.transition_prob(0, W, a) for W in self.S_cols])
for a in self.A_set
])
# np.set_printoptions(precision=1,suppress=True)
# print(self.trans_probs[0,0:10,0:10])
# print(self.trans_probs[0,1,:])
# print(self.trans_probs[0,1,:].shape)
#print(self.trans_probs)
#print(self.trans_probs.shape)
#assert(self.trans_probs.shape == (self.num_actions, self.num_wealth_states))
print("time steps: {} Max wealth: {} wealth steps: {}".format(
self.T, max_wealth, W_states_count))
def generic_dispersion(self, nd_dict, GH_dict=None):
weight_arrays = []
value_arrays = []
for i in range(0,
len(self.simulation_options["dispersion_parameters"])):
if self.simulation_options["dispersion_distributions"][
i] == "uniform":
value_arrays.append(
np.linspace(
self.simulation_options["dispersion_parameters"][i] +
"_lower",
self.simulation_options["dispersion_parameters"][i] +
"_upper",
self.simulation_options["dispersion_bins"][i]))
weight_arrays.append(
[1 / self.simulation_options["dispersion_bins"][i]] *
self.simulation_options["dispersion_bins"][i])
elif self.simulation_options["dispersion_distributions"][
i] == "normal":
param_mean = nd_dict[
self.simulation_options["dispersion_parameters"][i] +
"_mean"]
param_std = nd_dict[
self.simulation_options["dispersion_parameters"][i] +
"_std"]
if type(GH_dict) is dict:
param_vals = [
(param_std * math.sqrt(2) * node) + param_mean
for node in GH_dict["nodes"]
]
param_weights = GH_dict["normal_weights"]
else:
min_val = norm.ppf(1e-4, loc=param_mean, scale=param_std)
max_val = norm.ppf(1 - 1e-4,
loc=param_mean,
scale=param_std)
param_vals = np.linspace(
min_val, max_val,
self.simulation_options["dispersion_bins"][i])
param_weights = np.zeros(
self.simulation_options["dispersion_bins"][i])
param_weights[0] = norm.cdf(param_vals[0],
loc=param_mean,
scale=param_std)
param_midpoints = np.zeros(
self.simulation_options["dispersion_bins"][i])
param_midpoints[0] = norm.ppf((1e-4 / 2),
loc=param_mean,
scale=param_std)
for j in range(
1, self.simulation_options["dispersion_bins"][i]):
param_weights[j] = norm.cdf(
param_vals[j], loc=param_mean,
scale=param_std) - norm.cdf(param_vals[j - 1],
loc=param_mean,
scale=param_std)
param_midpoints[j] = (param_vals[j - 1] +
param_vals[j]) / 2
param_vals = param_midpoints
value_arrays.append(param_vals)
weight_arrays.append(param_weights)
elif self.simulation_options["dispersion_distributions"][
i] == "lognormal":
param_loc = 0
param_shape = nd_dict[
self.simulation_options["dispersion_parameters"][i] +
"_shape"]
param_scale = nd_dict[
self.simulation_options["dispersion_parameters"][i] +
"_scale"]
print("shape, scale", param_shape, param_scale)
min_val = lognorm.ppf(1e-4,
param_shape,
loc=param_loc,
scale=param_scale)
max_val = lognorm.ppf(1 - 1e-4,
param_shape,
loc=param_loc,
scale=param_scale)
param_vals = np.linspace(
min_val, max_val,
self.simulation_options["dispersion_bins"][i])
param_weights = np.zeros(
self.simulation_options["dispersion_bins"][i])
param_weights[0] = lognorm.cdf(param_vals[0],
param_shape,
loc=param_loc,
scale=param_scale)
param_midpoints = np.zeros(
self.simulation_options["dispersion_bins"][i])
param_midpoints[0] = lognorm.ppf((1e-4 / 2),
param_shape,
loc=param_loc,
scale=param_scale)
for j in range(1,
self.simulation_options["dispersion_bins"][i]):
param_weights[j] = lognorm.cdf(
param_vals[j],
param_shape,
loc=param_loc,
scale=param_scale) - lognorm.cdf(param_vals[j - 1],
param_shape,
loc=param_loc,
scale=param_scale)
param_midpoints[j] = (param_vals[j - 1] +
param_vals[j]) / 2
value_arrays.append(param_midpoints)
weight_arrays.append(param_weights)
elif self.simulation_options["dispersion_distributions"][
i] == "skewed_normal":
param_mean = nd_dict[
self.simulation_options["dispersion_parameters"][i] +
"_mean"]
param_std = nd_dict[
self.simulation_options["dispersion_parameters"][i] +
"_std"]
param_skew = nd_dict[
self.simulation_options["dispersion_parameters"][i] +
"_skew"]
min_val = skewnorm.ppf(1e-4,
param_skew,
loc=param_mean,
scale=param_std)
max_val = skewnorm.ppf(1 - 1e-4,
param_skew,
loc=param_mean,
scale=param_std)
param_vals = np.linspace(
min_val, max_val,
self.simulation_options["dispersion_bins"][i])
param_weights = np.zeros(
self.simulation_options["dispersion_bins"][i])
param_weights[0] = skewnorm.cdf(param_vals[0],
param_skew,
loc=param_mean,
scale=param_std)
param_midpoints = np.zeros(
self.simulation_options["dispersion_bins"][i])
param_midpoints[0] = skewnorm.ppf((1e-4 / 2),
param_skew,
loc=param_mean,
scale=param_std)
for j in range(1,
self.simulation_options["dispersion_bins"][i]):
param_weights[j] = skewnorm.cdf(
param_vals[j],
param_skew,
loc=param_mean,
scale=param_std) - skewnorm.cdf(param_vals[j - 1],
param_skew,
loc=param_mean,
scale=param_std)
param_midpoints[j] = (param_vals[j - 1] +
param_vals[j]) / 2
value_arrays.append(param_midpoints)
weight_arrays.append(param_weights)
elif self.simulation_options["dispersion_distributions"][
i] == "log_uniform":
param_upper = nd_dict[
self.simulation_options["dispersion_parameters"][i] +
"_logupper"]
param_lower = nd_dict[
self.simulation_options["dispersion_parameters"][i] +
"_loglower"]
min_val = loguniform.ppf(1e-4,
param_lower,
param_upper,
loc=0,
scale=1)
max_val = loguniform.ppf(1 - 1e-4,
param_lower,
param_upper,
loc=0,
scale=1)
param_vals = np.linspace(
min_val, max_val,
self.simulation_options["dispersion_bins"][i])
param_weights = np.zeros(
self.simulation_options["dispersion_bins"][i])
param_weights[0] = loguniform.cdf(min_val,
param_lower,
param_upper,
loc=0,
scale=1)
param_midpoints = np.zeros(
self.simulation_options["dispersion_bins"][i])
param_midpoints[0] = loguniform.ppf((1e-4) / 2,
param_lower,
param_upper,
loc=0,
scale=1)
for j in range(1,
self.simulation_options["dispersion_bins"][i]):
param_weights[j] = loguniform.cdf(
param_vals[j],
param_lower,
param_upper,
loc=0,
scale=1) - loguniform.cdf(param_vals[j - 1],
param_lower,
param_upper,
loc=0,
scale=1)
param_midpoints[j] = (param_vals[j - 1] +
param_vals[j]) / 2
value_arrays.append(param_midpoints)
weight_arrays.append(param_weights)
total_len = np.prod(self.simulation_options["dispersion_bins"])
weight_combinations = list(itertools.product(*weight_arrays))
value_combinations = list(itertools.product(*value_arrays))
sim_params = copy.deepcopy(
self.simulation_options["dispersion_parameters"])
for i in range(0, len(sim_params)):
if sim_params[i] == "E0":
sim_params[i] = "E_0"
if sim_params[i] == "k0":
sim_params[i] = "k_0"
return sim_params, value_combinations, weight_combinations
def mapping_beta_lognorm(arr):
from scipy.stats import lognorm
return 1.-lognorm.ppf(1.-np.array(arr),0.7)
def __init__(self, a, b, n, name, pa=0.1, pb=0.9, lognormal=False, Plot=True):
mscale.register_scale(ProbitScale)
if Plot:
fig = plt.figure(facecolor="white")
ax1 = fig.add_subplot(121, axisbelow=True)
ax2 = fig.add_subplot(122, axisbelow=True)
ax1.set_xlabel(name)
ax1.set_ylabel("ECDF and Best Fit CDF")
prop = matplotlib.font_manager.FontProperties(size=8)
if lognormal:
sigma = (log(b) - log(a)) / ((erfinv(2 * pb - 1) - erfinv(2 * pa - 1)) * (2 ** 0.5))
mu = log(a) - erfinv(2 * pa - 1) * sigma * (2 ** 0.5)
cdf = arange(0.001, 1.000, 0.001)
ppf = map(lambda v: lognorm.ppf(v, sigma, scale=exp(mu)), cdf)
x = lognorm.rvs(sigma, scale=exp(mu), size=n)
x.sort()
print "generating lognormal %s, p50 %0.3f, size %s" % (name, exp(mu), n)
x_s, ecdf_x = ecdf(x)
best_fit = lognorm.cdf(x, sigma, scale=exp(mu))
if Plot:
ax1.set_xscale("log")
ax2.set_xscale("log")
hist_y = lognorm.pdf(x_s, std(log(x)), scale=exp(mu))
else:
sigma = (b - a) / ((erfinv(2 * pb - 1) - erfinv(2 * pa - 1)) * (2 ** 0.5))
mu = a - erfinv(2 * pa - 1) * sigma * (2 ** 0.5)
cdf = arange(0.001, 1.000, 0.001)
ppf = map(lambda v: norm.ppf(v, mu, scale=sigma), cdf)
print "generating normal %s, p50 %0.3f, size %s" % (name, mu, n)
x = norm.rvs(mu, scale=sigma, size=n)
x.sort()
x_s, ecdf_x = ecdf(x)
best_fit = norm.cdf((x - mean(x)) / std(x))
hist_y = norm.pdf(x_s, loc=mean(x), scale=std(x))
pass
if Plot:
ax1.plot(ppf, cdf, "r-", linewidth=2)
ax1.set_yscale("probit")
ax1.plot(x_s, ecdf_x, "o")
ax1.plot(x, best_fit, "r--", linewidth=2)
n, bins, patches = ax2.hist(x, normed=1, facecolor="green", alpha=0.75)
bincenters = 0.5 * (bins[1:] + bins[:-1])
ax2.plot(x_s, hist_y, "r--", linewidth=2)
ax2.set_xlabel(name)
ax2.set_ylabel("Histogram and Best Fit PDF")
ax1.grid(b=True, which="both", color="black", linestyle="-", linewidth=1)
# ax1.grid(b=True, which='major', color='black', linestyle='--')
ax2.grid(True)
return
def SA_FAST(driver):
# First order indicies for a given model computed with Fourier Amplitude Sensitivity Test (FAST).
# R. I. Cukier, C. M. Fortuin, Kurt E. Shuler, A. G. Petschek and J. H. Schaibly.
# Study of the sensitivity of coupled reaction systems to uncertainties in rate coefficients.
# I-III Theory/Applications/Analysis The Journal of Chemical Physics
#
# Input:
# inpt : no. of input factors
#
# Output:
# SI[] : sensitivity indices
# Other used variables/constants:
# OM[] : frequencies of parameters
# S[] : search curve
# X[] : coordinates of sample points
# Y[] : output of model
# OMAX : maximum frequency
# N : number of sample points
# AC[],BC[]: fourier coefficients
# V : total variance
# VI : partial variances
# ---------------------- Setup ---------------------------
methd = 'FAST'
method = '9'
mu = [inp.get_I_mu() for inp in driver.inputs]
I_sigma = [inp.get_I_sigma() for inp in driver.inputs]
inpt = len(driver.inputs)
input = driver.inputNames
krig = driver.krig
limstate= driver.limstate
lrflag = driver.lrflag
n_meta = driver.n_meta
nEFAST = driver.nEFAST
nSOBOL = driver.nSOBOL
nMCS = driver.nMCS
nodes = driver.nodes
order = driver.order
otpt = len(driver.outputNames)
output = driver.outputNames
p = driver.p
plotf = 0
r = driver.r
simple = driver.simple
stvars = driver.stvars
# ---------------------- Model ---------------------------
#
MI = 4#: maximum number of fourier coefficients that may be retained in
# calculating the partial variances without interferences between the assigned frequencies
#
# Frequency assignment to input factors.
OM = SETFREQ(inpt)
# Computation of the maximum frequency
# OMAX and the no. of sample points N.
OMAX = int(OM[inpt-1])
N = 2 * MI * OMAX + 1
# Setting the relation between the scalar variable S and the coordinates
# {X(1),X(2),...X(inpt)} of each sample point.
S = pi / 2.0 * (2 * arange(1,N+1) - N-1) / N
ANGLE = matrix(OM).T * matrix(S)
X = 0.5 + arcsin(sin(ANGLE.T)) / pi
# Transform distributions from standard uniform to general.
for j in range(inpt):
if stvars[j].dist == 'NORM':
X[:,j] = norm.ppf(uniform.cdf(X[:,j], 0, 1), stvars[j].param[0], stvars[j].param[1])
elif stvars[j].dist == 'LNORM':
X[:,j] = lognorm.ppf(uniform.cdf(X[:, j], 0, 1), stvars[j].param[1], 0, exp(stvars[j].param[0]))
elif stvars[j].dist == 'BETA':
X[:,j] = beta.ppf(uniform.cdf(X[:, j], 0, 1), stvars[j].param[0], stvars[j].param[1], stvars[j].param[2], stvars[j].param[3] - stvars[j].param[2])
elif stvars[j].dist == 'UNIF':
X[:,j] = uniform.ppf(uniform.cdf(X[:,j], 0, 1), stvars[j].param[0], stvars[j].param[1])
# Do the N model evaluations.
Y = zeros((N, otpt))
if krig == 1:
load("dmodel")
Y = predictor(X, dmodel)
else:
values = []
for p in range(N):
# print 'Running simulation on test',p+1,'of',N
# Y[p] = run_model(driver, array(X[p])[0])
values.append(array(X[p])[0])
Y = run_list(driver, values)
# Computation of Fourier coefficients.
AC = zeros((N, otpt))# initially zero
BC = zeros((N, otpt))# initially zero
# q = int(N / 2)-1
q = (N-1)/2
for j in range(2,N+1,2): # j is even
# print "Y[q]",Y[q]
# print "matrix(cos(pi * j * arange(1,q+) / N))",matrix(cos(pi * j * arange(1,q+1) / N))
# print "matrix(Y[q + arange(0,q)] + Y[q - arange(0,q)])",matrix(Y[q + arange(1,q+1)] + Y[q - arange(1,q+1)])
AC[j-1] = 1.0 / N * matrix(Y[q] + matrix(cos(pi * j * arange(1,q+1) / N)) * matrix(Y[q + arange(1,q+1)] + Y[q - arange(1,q+1)]))
for j in range(1,N+1,2): # j is odd
BC[j-1] = 1.0 / N * matrix(sin(pi * j * arange(1,q+1) / N)) * matrix(Y[q + arange(1,q+1)] - Y[q - arange(1,q+1)])
# Computation of the general variance V in the frequency domain.
V = 2 * (matrix(AC).T * matrix(AC) + matrix(BC).T * matrix(BC))
# Computation of the partial variances and sensitivity indices.
# Si=zeros(inpt,otpt);
Si = zeros((otpt,otpt,inpt));
for i in range(inpt):
Vi = zeros((otpt, otpt))
for j in range(1,MI+1):
idx = j * OM[i]-1
Vi = Vi + AC[idx].T * AC[idx] + BC[idx].T * BC[idx]
Vi = 2. * Vi
Si[:, :, i] = Vi / V
if lrflag == 1:
SRC, stat = SRC_regress.SRC_regress(X, Y, otpt, N)
# ---------------------- Analyze ---------------------------
Sti = []# appears right after the call to this method in the original PCC_Computation.m
# if plotf == 1:
# piecharts(inpt, otpt, Si, Sti, method, output)
if simple == 1:
Si_t = zeros((inpt,otpt))
for p in range(inpt):
Si_t[p] = diag(Si[:, :, p])
Si = Si_t.T
Results = {'FirstOrderSensitivity': Si}
if lrflag == 1:
Results.update({'SRC': SRC, 'R^2': stat})
return Results
def SA_EFAST(driver):
#[SI,STI] = EFAST(K,WANTEDN)
# First order and total effect indices for a given model computed with
# Extended Fourier Amplitude Sensitivity Test (EFAST).
# Andrea Saltelli, Stefano Tarantola and Karen Chan. 1999
# A quantitative model-independent method for global sensitivity analysis of model output.
# Technometrics 41:39-56
#
# Input:
# inpt : no. of input factors
# WANTEDN : wanted no. of sample points
#
# Output:
# SI[] : first order sensitivity indices
# STI[] : total effect sensitivity indices
# Other used variables/constants:
# OM[] : vector of inpt frequencies
# OMI : frequency for the group of interest
# OMCI[] : set of freq. used for the compl. group
# X[] : parameter combination rank matrix
# AC[],BC[]: fourier coefficients
# FI[] : random phase shift
# V : total output variance (for each curve)
# VI : partial var. of par. i (for each curve)
# VCI : part. var. of the compl. set of par...
# AV : total variance in the time domain
# AVI : partial variance of par. i
# AVCI : part. var. of the compl. set of par.
# Y[] : model output
# N : no. of runs on each curve
# ---------------------- Setup ---------------------------
methd = 'EFAST'
method = '10'
mu = [inp.get_I_mu() for inp in driver.inputs]
I_sigma = [inp.get_I_sigma() for inp in driver.inputs]
inpt = len(driver.inputs)
input = driver.inputNames
krig = driver.krig
limstate= driver.limstate
lrflag = driver.lrflag
n_meta = driver.n_meta
nEFAST = driver.nEFAST
nSOBOL = driver.nSOBOL
nMCS = driver.nMCS
nodes = driver.nodes
order = driver.order
otpt = len(driver.outputNames)
output = driver.outputNames
p = driver.p
plotf = 0
r = driver.r
simple = driver.simple
stvars = driver.stvars
# ---------------------- Model ---------------------------
NR = 1#: no. of search curves
MI = 4#: maximum number of fourier coefficients that may be retained in calculating
# the partial variances without interferences between the assigned frequencies
#
# Computation of the frequency for the group of interest OMi and the no. of sample points N.
OMi = int(floor((nEFAST / NR - 1) / (2 * MI) / inpt))
N = 2 * MI * OMi + 1
total_sims = N*NR*inpt
sim = 0
if (N * NR < 65):
logging.error('sample size must be >= 65 per factor.')
raise ValueError,'sample size must be >= 65 per factor.'
# Algorithm for selecting the set of frequencies. OMci(i), i=1:inpt-1, contains
# the set of frequencies to be used by the complementary group.
OMci = SETFREQ(N - 1, OMi / 2 / MI)
# Loop over the inpt input factors.
Si = zeros((otpt,otpt,inpt));
Sti = zeros((otpt,otpt,inpt));
for i in range(inpt):
# Initialize AV,AVi,AVci to zero.
AV = 0
AVi = 0
AVci = 0
# Loop over the NR search curves.
for L in range(NR):
# Setting the vector of frequencies OM for the inpt factors.
cj = 1
OM = zeros(inpt)
for j in range(inpt):
if (j == i):
# For the factor of interest.
OM[i] = OMi
else:
# For the complementary group.
OM[j] = OMci[cj]
cj = cj + 1
# Setting the relation between the scalar variable S and the coordinates
# {X(1),X(2),...X(inpt)} of each sample point.
FI = zeros(inpt)
for j in range(inpt):
FI[j] = random.random() * 2 * pi # random phase shift
S_VEC = pi * (2 * arange(1,N+1) - N - 1) / N
OM_VEC = OM[range(inpt)]
FI_MAT = transpose(array([FI]*N))
ANGLE = matrix(OM_VEC).T*matrix(S_VEC) + matrix(FI_MAT)
X = 0.5 + arcsin(sin(ANGLE.T)) / pi
# Transform distributions from standard uniform to general.
for j in range(inpt):
if stvars[j].dist == 'NORM':
X[:,j] = norm.ppf(uniform.cdf(X[:,j], 0, 1), stvars[j].param[0], stvars[j].param[1])
elif stvars[j].dist == 'LNORM':
X[:,j] = lognorm.ppf(uniform.cdf(X[:, j], 0, 1), stvars[j].param[1], 0, exp(stvars[j].param[0]))
elif stvars[j].dist == 'BETA':
X[:,j] = beta.ppf(uniform.cdf(X[:, j], 0, 1), stvars[j].param[0], stvars[j].param[1], stvars[j].param[2], stvars[j].param[3] - stvars[j].param[2])
elif stvars[j].dist == 'UNIF':
X[:,j] = uniform.ppf(uniform.cdf(X[:,j], 0, 1), stvars[j].param[0], stvars[j].param[1])
# Do the N model evaluations.
Y = zeros((N, otpt))
if krig == 1:
load("dmodel")
Y = predictor(X, dmodel)
else:
values = []
for p in range(N):
# sim += 1
# print 'Running simulation on test',sim,'of',total_sims
# Y[p] = run_model(driver, array(X[p])[0])
values.append(array(X[p])[0])
Y = run_list(driver, values)
# Subtract the average value.
Y = Y - kron(mean(Y,0), ones((N, 1)))
# Fourier coeff. at [1:OMi/2].
NQ = int(N / 2)-1
N0 = NQ + 1
COMPL = 0
Y_VECP = Y[N0+1:] + Y[NQ::-1]
Y_VECM = Y[N0+1:] - Y[NQ::-1]
# AC = zeros((int(ceil(OMi / 2)), otpt))
# BC = zeros((int(ceil(OMi / 2)), otpt))
AC = zeros((OMi * MI, otpt))
BC = zeros((OMi * MI, otpt))
for j in range(int(ceil(OMi / 2))+1):
ANGLE = (j+1) * 2 * arange(1,NQ+2) * pi / N
C_VEC = cos(ANGLE)
S_VEC = sin(ANGLE)
AC[j] = (Y[N0] +matrix(C_VEC)*matrix(Y_VECP)) / N
BC[j] = matrix(S_VEC) * matrix(Y_VECM) / N
COMPL = COMPL + matrix(AC[j]).T * matrix(AC[j]) + matrix(BC[j]).T * matrix(BC[j])
# Computation of V_{(ci)}.
Vci = 2 * COMPL
AVci = AVci + Vci
# Fourier coeff. at [P*OMi, for P=1:MI].
COMPL = 0
# Do these need to be recomputed at all?
# Y_VECP = Y[N0 + range(NQ)] + Y[N0 - range(NQ)]
# Y_VECM = Y[N0 + range(NQ)] - Y[N0 - range(NQ)]
for j in range(OMi, OMi * MI + 1, OMi):
ANGLE = j * 2 * arange(1,NQ+2) * pi / N
C_VEC = cos(ANGLE)
S_VEC = sin(ANGLE)
AC[j-1] = (Y[N0] + matrix(C_VEC)*matrix(Y_VECP)) / N
BC[j-1] = matrix(S_VEC) * matrix(Y_VECM) / N
COMPL = COMPL + matrix(AC[j-1]).T * matrix(AC[j-1]) + matrix(BC[j-1]).T * matrix(BC[j-1])
# Computation of V_i.
Vi = 2 * COMPL
AVi = AVi + Vi
# Computation of the total variance in the time domain.
AV = AV + matrix(Y).T * matrix(Y) / N
# Computation of sensitivity indicies.
AV = AV / NR
AVi = AVi / NR
AVci = AVci / NR
Si[:, :, i] = AVi / AV
Sti[:, :, i] = 1 - AVci / AV
if lrflag == 1:
SRC, stat = SRC_regress.SRC_regress(X, Y, otpt, N)
# ---------------------- Analyze ---------------------------
# if plotf == 1:
# piecharts(inpt, otpt, Si, Sti, methd, output)
if simple == 1:
Si_t = zeros((inpt,otpt))
for p in range(inpt):
Si_t[p] = diag(Si[:, :, p])
Si = Si_t.T
if simple == 1:
Sti_t = zeros((inpt,otpt))
for p in range(inpt):
Sti_t[p] = diag(Sti[:, :, p])
Sti = Sti_t.T
Results = {'FirstOrderSensitivity': Si, 'TotalEffectSensitivity': Sti}
if lrflag == 1:
Results.update({'SRC': SRC, 'R^2': stat})
return Results
def gen_obs(self):
uMean = uStdDev = cMean = pUnc = np.empty(self.nSeg, dtype=float)
sProb = cProb = np.array([np.empty(4, dtype=float) for i in xrange(self.nSeg)])
jRV = sVeh = tRte = np.empty(self.nObs, dtype=float)
tVeh = np.array([np.empty(self.nObs, dtype=float) for i in xrange(self.nSeg)])
times = [[] for i in xrange(self.nSeg)]
totals = []
uMean, uStdDev = self.get_means_stdv()
#Randomize
# for k in xrange(1,nSeg+1):
# 'Read the means and standard deviations for uncongested and congested times'
# uMean(k) = Worksheets("Route").Cells(3, 3 + k).Value
# uStdDev(k) = Worksheets("Route").Cells(4, 3 + k).Value
# cMean(k) = Worksheets("Route").Cells(5, 3 + k).Value
# cStdDev(k) = Worksheets("Route").Cells(6, 3 + k).Value
# 'Read the state transitions'
# sProb(k, 1) = Worksheets("Route").Cells(8, 3 + k).Value
# cProb(k, 1) = sProb(k, 1)
# sProb(k, 2) = Worksheets("Route").Cells(9, 3 + k).Value
# cProb(k, 2) = cProb(k, 1) + sProb(k, 2)
# sProb(k, 3) = Worksheets("Route").Cells(10, 3 + k).Value
# cProb(k, 3) = cProb(k, 2) + sProb(k, 3)
# sProb(k, 4) = Worksheets("Route").Cells(11, 3 + k).Value
# cProb(k, 4) = cProb(k, 3) + sProb(k, 4)
# pUnc(k) = cProb(k, 2)
#Initialize the states of the vehicles'
for j in xrange(self.nObs)
k = 1 #'use the state probabilities for the first segment'
srv = random.uniform(0,1) #'state selection random variable'
if srv < cProb[0][k]):
sVeh[j] = 1
elif srv < cProb[1][k]:
sVeh[j] = 2
elif srv < cProb[2][k]:
sVeh[j] = 3
else:
sVeh[j] = 4
for j in xrange(self.nObs):
rvu = random.uniform(0,1) #'uncongested travel rate - driver type'
tTot = 0.
for k in xrange(self.nSeg)
if sVeh[j] <= 2:
rvt = rvu
mean = uMean[k]
StdDev = uStdDev[k]
else:
rvt = random.uniform(0,1)
mean = cMean[k]
StdDev = cStdDev[k]
tSeg = lognorm.ppf(rvt, s = StdDev, scale = np.exp(mean))
times[k].append(tSeg)
tVeh[k][j] = tSeg
tTot = tTot + tSeg
#'Update the state of the vehicle'
if k < self.nSeg:
if sVeh[j] == 1 or sVeh[j] == 3:
srv = 0.5 * random.uniform(0,1) #'state selection random variable'
if srv < cProb[0][k+1]:
sVeh[j] = 1
else:
sVeh[j] = 2
else:# '(sVeh(j) = 2) Or (sVeh(j) = 4)'
srv = 0.5 + 0.5 * random.uniform(0,1) #'state selection random variable'
if srv < cProb[2][k+1]:
sVeh[j] = 3
else:
sVeh[j] = 4
totals.append(tTot)
self.tTimes = times
self.tTotals = totals
def lognorm_trunc(p, low, up, mu, sig):
cdf2 = lognorm.cdf(up, sig, loc=0, scale=np.exp(mu))
cdf1 = lognorm.cdf(low, sig, loc=0, scale=np.exp(mu))
pc = p * (cdf2 - cdf1) + cdf1
dt = lognorm.ppf(pc, sig, loc=0, scale=np.exp(mu))
return dt
def UP_MCS(driver):
# Uses the MCS method for UP
mu = [inp.get_I_mu() for inp in driver.inputs]
I_sigma = [inp.get_I_sigma() for inp in driver.inputs]
inpt = len(driver.inputs)
input = driver.inputNames
krig = driver.krig
limstate= driver.limstate
lrflag = driver.lrflag
n_meta = driver.n_meta
nEFAST = driver.nEFAST
nSOBOL = driver.nSOBOL
nMCS = driver.nMCS
nodes = driver.nodes
order = driver.order
otpt = len(driver.outputNames)
output = driver.outputNames
p = driver.p
plotf = 0
r = driver.r
simple = driver.simple
stvars = driver.stvars
#*****************RANDOM DRAWS FROM INPUT DISTRIBUTIONS********************
value = asarray(LHS.LHS(inpt, nMCS))
for j in range(inpt):
if stvars[j].dist == 'NORM':
value[:,j] = norm.ppf(uniform.cdf(value[:,j], 0, 1), stvars[j].param[0], stvars[j].param[1])
elif stvars[j].dist == 'LNORM':
value[:,j] = lognorm.ppf(uniform.cdf(value[:, j], 0, 1), stvars[j].param[1], 0, exp(stvars[j].param[0]))
elif stvars[j].dist == 'BETA':
value[:,j] = beta.ppf(uniform.cdf(value[:, j], 0, 1), stvars[j].param[0], stvars[j].param[1], stvars[j].param[2], stvars[j].param[3] - stvars[j].param[2])
elif stvars[j].dist == 'UNIF':
value[:,j] = uniform.ppf(uniform.cdf(value[:,j], 0, 1), stvars[j].param[0], stvars[j].param[1])
# ---------------------- Model ---------------------------
out = zeros((nMCS, otpt))
if krig == 1:
load("dmodel")
out = predictor(value, dmodel)
else:
# for i in range(nMCS):
# print 'Running simulation',i+1,'of',nMCS,'with inputs',value[i]
# out[i] = run_model(driver, value[i])
out = run_list(driver, value)
limstate = asarray(limstate)
limstate1 = asarray(kron(limstate[:, 0], ones(nMCS))).reshape(otpt,nMCS).transpose()
limstate2 = asarray(kron(limstate[:, 1], ones(nMCS))).reshape(otpt,nMCS).transpose()
B = logical_and(greater_equal(out,limstate1),less_equal(out,limstate2))
PCC = sum(B,0) / nMCS
B_t = B[sum(B,1) == otpt]
if otpt > 1 and not 0 in PCC[0:otpt]:
PCC = append(PCC,len(B_t) / nMCS)
#Moments
CovarianceMatrix = matrix(cov(out,None,0))#.transpose()
Moments = {'Mean': mean(out,0), 'Variance': diag(CovarianceMatrix), 'Skewness': skew(out), 'Kurtosis': kurtosis(out,fisher=False)}
# combine the display of the correlation matrix with setting a var that will be needed below
sigma_mat=matrix(sqrt(diag(CovarianceMatrix)))
CorrelationMatrix= CovarianceMatrix/multiply(sigma_mat,sigma_mat.transpose())
# ---------------------- Analyze ---------------------------
if any(Moments['Variance']==0):
print "Warning: One or more outputs does not vary over given parameter variation."
C_Y = [0]*otpt
for k in range(0,otpt):
if Moments['Variance'][k]!=0:
C_Y[k] = estimate_complexity.with_samples(out[:,k],nMCS)
sigma_mat=matrix(sqrt(diag(CovarianceMatrix)))
seterr(invalid='ignore') #ignore problems with divide-by-zero, just give us 'nan' as usual
CorrelationMatrix= CovarianceMatrix/multiply(sigma_mat,sigma_mat.transpose())
Distribution = {'Complexity': C_Y}
CorrelationMatrix=where(isnan(CorrelationMatrix), None, CorrelationMatrix)
Results = {'Moments': Moments, 'CorrelationMatrix': CorrelationMatrix,
'CovarianceMatrix': CovarianceMatrix, 'Distribution': Distribution, 'PCC': PCC}
return Results