From 43994c4301d9af9c365e0d1a3f839eafc631f3a3 Mon Sep 17 00:00:00 2001
From: farid <farid.mohammadi@iws.uni-stuttgart.de>
Date: Tue, 19 Jan 2021 11:02:11 +0100
Subject: [PATCH] [all] minor changes.
---
.../BayesInference/BayesInference.py | 12 ++++---
BayesValidRox/surrogate_models/ExpDesigns.py | 2 +-
.../surrogate_models/surrogate_models.py | 32 +++++++++++--------
3 files changed, 28 insertions(+), 18 deletions(-)
diff --git a/BayesValidRox/BayesInference/BayesInference.py b/BayesValidRox/BayesInference/BayesInference.py
index e420eafef..9d5a7e95c 100644
--- a/BayesValidRox/BayesInference/BayesInference.py
+++ b/BayesValidRox/BayesInference/BayesInference.py
@@ -509,6 +509,7 @@ class BayesInference:
NofPa = PCEModel.NofPa
OutputNames = Model.Output.Names
BootstrapItrNr = self.BootstrapItrNr
+ parNames = [self.PCEModel.Inputs.Marginals[i].Name for i in range(len(PCEModel.Inputs.Marginals))]
# If the prior is set by the user, take it.
@@ -678,11 +679,15 @@ class BayesInference:
MCMC_ = MCMC(self, initsamples=initsamples, nwalkers=nwalkers, verbose=self.MCMCverbose,
nsteps = nsteps, moves=self.MCMCmoves, multiprocessing=multiprocessing)
self.Posterior_df = MCMC_.run_sampler(Data[0], TotalSigma2)
+
+ elif self.Name.lower() == 'valid':
+ self.Posterior_df = pd.DataFrame(self.Samples, columns=parNames)
else: # Rejection sampling
self.Posterior_df = self.Rejection_Sampling()
-
- # Provide description
+
+
+ # Provide posterior's summary
print('\n')
print('-'*15 + 'Posterior summary' + '-'*15)
pd.options.display.max_columns = None
@@ -708,7 +713,6 @@ class BayesInference:
if not os.path.exists(OutputDir): os.makedirs(OutputDir)
# -------- Posteior parameters --------
- parNames = [self.PCEModel.Inputs.Marginals[i].Name for i in range(len(PCEModel.Inputs.Marginals))]
if optSigma != "B":
parNames.extend([self.Discrepancy.InputDisc.Marginals[i].Name for i in range(len(Model.Output.Names))])
@@ -743,7 +747,7 @@ class BayesInference:
# ax.plot(MAP_theta[0,xi], MAP_theta[0,yi], "sr")
# plt.yticks(rotation=45, horizontalalignment='right')
- figPosterior.set_size_inches((24,16))
+ figPosterior.set_size_inches((24,16))
if self.emulator:
plotname = '/Posterior_Dist_'+Model.Name+'_emulator'
diff --git a/BayesValidRox/surrogate_models/ExpDesigns.py b/BayesValidRox/surrogate_models/ExpDesigns.py
index 8df252bf2..7f71e6d00 100644
--- a/BayesValidRox/surrogate_models/ExpDesigns.py
+++ b/BayesValidRox/surrogate_models/ExpDesigns.py
@@ -22,7 +22,7 @@ class ExpDesigns:
self.MCSize = 10000
self.Input_distributions = []
self.BoundTuples = []
- self.SamplingMethod = 'MC'
+ self.SamplingMethod = 'random'
self.metaModel = metaModel
self.TradeOffScheme = 'None'
# TODO: This should be prescribed by TotalNSamples
diff --git a/BayesValidRox/surrogate_models/surrogate_models.py b/BayesValidRox/surrogate_models/surrogate_models.py
index dcd99dafa..220586ff5 100644
--- a/BayesValidRox/surrogate_models/surrogate_models.py
+++ b/BayesValidRox/surrogate_models/surrogate_models.py
@@ -1022,11 +1022,11 @@ class Metamodel:
Y_PC_can, std_PC_can = self.eval_metamodel(samples=X_can)
canPredVar = {key:std_PC_can[key]**2 for key in OutputNames}
- varPCE = []
+ varPCE = np.zeros((len(OutputNames),X_can.shape[0]))
for KeyIdx, key in enumerate(OutputNames):
- varPCE.extend(np.max(canPredVar[key],axis=1))
- score = np.array(varPCE)
-
+ varPCE[KeyIdx] = np.max(canPredVar[key],axis=1)
+ score = np.max(varPCE, axis=0)
+
elif UtilMethod == 'EIGF':
# ----- Expected Improvement for Global fit -----
# Eq (5) from Liu et al.(2018)
@@ -1035,13 +1035,14 @@ class Metamodel:
predError = {key:Y_PC_can[key] for key in OutputNames}
canPredVar = {key:std_PC_can[key]**2 for key in OutputNames}
- EIGF_PCE = []
+ EIGF_PCE = np.zeros((len(OutputNames),X_can.shape[0]))
for KeyIdx, key in enumerate(OutputNames):
residual = predError[key] - OutputDictY[key][index]
var = canPredVar[key]
EIGF_PCE.extend(np.max(residual**2 + var,axis=1))
- score = np.array(EIGF_PCE)
-
+ EIGF_PCE[KeyIdx] = np.max(residual**2 + var,axis=1)
+ score = np.max(EIGF_PCE, axis=0)
+
return -1 * score # -1 is for minimization instead of maximization
#--------------------------------------------------------------------------------------------------------
@@ -2074,15 +2075,20 @@ class Metamodel:
ModelOutputNames = self.ModelObj.Output.Names
SampleSize, index = PCEOutputs[ModelOutputNames[0]].shape
- if self.index is not None: index = self.index
-
+ # if self.index is not None: index = self.index
+ index = self.index if type(self.index) is list else [self.index]*len(ModelOutputNames)
+
# Flatten the ObservationData
TotalData = ObservationData[ModelOutputNames].to_numpy().flatten('F')
+ # Remove NaN
+ TotalData = TotalData[~np.isnan(TotalData)]
+ Sigma2s = Sigma2s[~np.isnan(Sigma2s)]
+
# Flatten the Output
TotalOutputs = np.empty((SampleSize,0))
- for key in ModelOutputNames:
- TotalOutputs = np.hstack((TotalOutputs, PCEOutputs[key][:,:index]))
+ for idx, key in enumerate(ModelOutputNames):
+ TotalOutputs = np.hstack((TotalOutputs, PCEOutputs[key][:,:index[idx]]))
# Covariance Matrix
covMatrix = np.zeros((Sigma2s.shape[0], Sigma2s.shape[0]), float)
@@ -2091,8 +2097,8 @@ class Metamodel:
# Add the std of the PCE.
covMatrix_PCE = np.zeros((Sigma2s.shape[0], Sigma2s.shape[0]), float)
stdPCE = np.empty((SampleSize,0))
- for key in ModelOutputNames:
- stdPCE = np.hstack((stdPCE, std_PC_MC[key][:,:index]))
+ for idx, key in enumerate(ModelOutputNames):
+ stdPCE = np.hstack((stdPCE, std_PC_MC[key][:,:index[idx]]))
# Expected value of variance (Assump: i.i.d stds)
varPCE = np.mean(stdPCE**2, axis=0)
--
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