def AlignModelAndCalcDistance(Data, hmodel):
from bnpy.allocmodel.hmm.HMMUtil import runViterbiAlg
initPi = hmodel.allocModel.get_init_prob_vector()
transPi = hmodel.allocModel.get_trans_prob_matrix()
LP = hmodel.obsModel.calc_local_params(Data)
Lik = LP['E_log_soft_ev']
# Loop over each sequence in the collection
zHatBySeq = list()
for n in range(Data.nDoc):
start = Data.doc_range[n]
stop = Data.doc_range[n+1]
zHat = runViterbiAlg(Lik[start:stop], initPi, transPi)
zHatBySeq.append(zHat)
zHatFlat = StateSeqUtil.convertStateSeq_list2flat(zHatBySeq, Data)
zHatFlatAligned = \
StateSeqUtil.alignEstimatedStateSeqToTruth(zHatFlat, Data.TrueParams['Z'])
zHatBySeqAligned = StateSeqUtil.convertStateSeq_flat2list(
zHatFlatAligned, Data)
zTrue = Data.TrueParams['Z']
hdistance = StateSeqUtil.calcHammingDistance(zHatFlatAligned, zTrue)
normhdist = float(hdistance) / float(zHatFlatAligned.size)
print 'distance=', normhdist
return zHatBySeqAligned
def CheckViterbiVsSoft(jobpath, taskid):
taskpath = PU.MakePath(os.path.join(jobpath, str(taskid)))
hmodel = bnpy.load_model(taskpath)
LPsoft = hmodel.calc_local_params(Data, limitMemoryLP=1)
SSsoft = hmodel.get_global_suff_stats(Data, LPsoft)
#zHatBySeq = AlignModelAndCalcDistance(Data, hmodel)
from bnpy.allocmodel.hmm.HMMUtil import runViterbiAlg
initPi = hmodel.allocModel.get_init_prob_vector()
transPi = hmodel.allocModel.get_trans_prob_matrix()
LP = hmodel.obsModel.calc_local_params(Data)
Lik = LP['E_log_soft_ev']
# Loop over each sequence in the collection
zHatBySeq = list()
for n in range(Data.nDoc):
start = Data.doc_range[n]
stop = Data.doc_range[n+1]
zHat = runViterbiAlg(Lik[start:stop], initPi, transPi)
zHatBySeq.append(zHat)
zHatFlat = StateSeqUtil.convertStateSeq_list2flat(zHatBySeq, Data)
LP = dict(Z=zHatFlat)
LP = bnpy.init.FromTruth.convertLPFromHardToSoft(LP, Data,
startIDsAt0=True,
Kmax=SSsoft.K)
LP = hmodel.allocModel.initLPFromResp(Data, LP)
SShard = hmodel.get_global_suff_stats(Data, LP)
return SShard, SSsoft, LPsoft
def decode(self, X, lengths):
Xprev = X[:-1, :]
X = X[1:, :]
doc_range = list([0])
doc_range += (np.cumsum(lengths).tolist())
dataset = bnpy.data.GroupXData(X, doc_range, None, Xprev)
from bnpy.allocmodel.hmm.HMMUtil import runViterbiAlg
from bnpy.util import StateSeqUtil
initPi = self.model.allocModel.get_init_prob_vector()
transPi = self.model.allocModel.get_trans_prob_matrix()
LP = self.model.calc_local_params(dataset)
Lik = LP['E_log_soft_ev']
zHatBySeq = list()
for n in range(dataset.nDoc):
start = dataset.doc_range[n]
stop = dataset.doc_range[n + 1]
zHat = runViterbiAlg(Lik[start:stop], initPi, transPi)
zHatBySeq.append(zHat)
zHatFlat = StateSeqUtil.convertStateSeq_list2flat(zHatBySeq, dataset)
return zHatFlat
def runViterbiAndSave(**kwargs):
''' Run viterbi alg on each sequence in dataset, and save to file.
Keyword Args (all workspace variables passed along from learning alg)
-------
hmodel : current HModel object
Data : current Data object
representing *entire* dataset (not just one chunk)
Returns
-------
None. MAP state sequences are saved to a MAT file.
Output
-------
MATfile format: Lap0020.000MAPStateSeqs.mat
'''
if 'Data' in kwargs:
Data = kwargs['Data']
elif 'DataIterator' in kwargs:
try:
Data = kwargs['DataIterator'].Data
except AttributeError:
from bnpy.data.DataIteratorFromDisk import loadDataForSlice
Dinfo = dict()
Dinfo.update(kwargs['DataIterator'].DataInfo)
if 'evalDataPath' in Dinfo:
Dinfo['filepath'] = os.path.expandvars(Dinfo['evalDataPath'])
Data = loadDataForSlice(**Dinfo)
else:
raise ValueError('DataIterator has no attribute Data')
else:
return None
hmodel = kwargs['hmodel']
lapFrac = kwargs['lapFrac']
if 'savedir' in kwargs:
savedir = kwargs['savedir']
elif 'learnAlg' in kwargs:
learnAlgObj = kwargs['learnAlg']
savedir = learnAlgObj.savedir
if hasattr(learnAlgObj, 'start_time'):
elapsedTime = learnAlgObj.get_elapsed_time()
else:
elapsedTime = 0.0
timestxtpath = os.path.join(savedir, 'times-saved-params.txt')
with open(timestxtpath, 'a') as f:
f.write('%.3f\n' % (elapsedTime))
initPi = hmodel.allocModel.get_init_prob_vector()
transPi = hmodel.allocModel.get_trans_prob_matrix()
LP = hmodel.obsModel.calc_local_params(Data)
Lik = LP['E_log_soft_ev']
# Loop over each sequence in the collection
zHatBySeq = list()
for n in range(Data.nDoc):
start = Data.doc_range[n]
stop = Data.doc_range[n + 1]
zHat = runViterbiAlg(Lik[start:stop], initPi, transPi)
zHatBySeq.append(zHat)
# Store MAP sequence to file
prefix = makePrefixForLap(lapFrac)
matfilepath = os.path.join(savedir, prefix + 'MAPStateSeqs.mat')
MATVarsDict = dict(
zHatBySeq=StateSeqUtil.convertStateSeq_list2MAT(zHatBySeq))
scipy.io.savemat(matfilepath, MATVarsDict, oned_as='row')
zHatFlat = StateSeqUtil.convertStateSeq_list2flat(zHatBySeq, Data)
Keff = np.unique(zHatFlat).size
Kefftxtpath = os.path.join(savedir, 'Keff-saved-params.txt')
with open(Kefftxtpath, 'a') as f:
f.write('%d\n' % (Keff))
Ktotal = hmodel.obsModel.K
Ktotaltxtpath = os.path.join(savedir, 'Ktotal-saved-params.txt')
with open(Ktotaltxtpath, 'a') as f:
f.write('%d\n' % (Keff))
# Save sequence aligned to truth and calculate Hamming distance
if (hasattr(Data, 'TrueParams')) and ('Z' in Data.TrueParams):
zHatFlatAligned = StateSeqUtil.alignEstimatedStateSeqToTruth(
zHatFlat, Data.TrueParams['Z'])
zHatBySeqAligned = StateSeqUtil.convertStateSeq_flat2list(
zHatFlatAligned, Data)
zHatBySeqAligned_Arr = StateSeqUtil.convertStateSeq_list2MAT(
zHatBySeqAligned)
MATVarsDict = dict(zHatBySeqAligned=zHatBySeqAligned_Arr)
matfilepath = os.path.join(savedir, prefix + 'MAPStateSeqsAligned.mat')
scipy.io.savemat(matfilepath, MATVarsDict, oned_as='row')
kwargs['Data'] = Data
calcHammingDistanceAndSave(zHatFlatAligned, **kwargs)
