def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(params['encoding_num'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'],
classifyWithRandom=params[
'classify_with_random'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'])
else:
raise Exception("Dataset not found")
self.computeCounter = 0
self.history = []
self.resets = []
self.randoms = []
self.currentSequence = self.dataset.generateSequence()
self.net = None
self.sequenceCounter = 0
def reset(self, params, repetition):
random.seed(params['seed'])
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'])
else:
raise Exception("Dataset not found")
# if not os.path.exists(resultsDir):
# os.makedirs(resultsDir)
# self.resultsFile = open(os.path.join(resultsDir, "0.log"), 'w')
if params['verbosity'] > 0:
print " initializing HTM model..."
self.model = ModelFactory.create(MODEL_PARAMS)
self.model.enableInference({"predictedField": "element"})
self.shifter = InferenceShifter()
self.mapping = getEncoderMapping(self.model)
self.currentSequence = self.dataset.generateSequence()
self.numPredictedActiveCells = []
self.numPredictedInactiveCells = []
self.numUnpredictedActiveColumns = []
self.currentSequence = self.dataset.generateSequence()
self.perturbed = False
self.randoms = []
self.verbosity = 1
self.sequenceCounter = 0
def __init__(self, numPredictions, resultsDir):
random.seed(43)
self.numPredictions = numPredictions
if not os.path.exists(resultsDir):
os.makedirs(resultsDir)
self.resultsFile = open(os.path.join(resultsDir, "0.log"), 'w')
self.model = ModelFactory.create(MODEL_PARAMS)
self.model.enableInference({"predictedField": "element"})
self.shifter = InferenceShifter()
self.mapping = getEncoderMapping(self.model)
self.correct = []
self.numPredictedActiveCells = []
self.numPredictedInactiveCells = []
self.numUnpredictedActiveColumns = []
self.iteration = 0
self.perturbed = False
self.randoms = []
self.verbosity = 1
self.dataset = HighOrderDataset(numPredictions=self.numPredictions)
self.sequences = []
self.currentSequence = []
self.replenish_sequence()
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(params['encoding_num'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'],
classifyWithRandom=params[
'classify_with_random'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'])
else:
raise Exception("Dataset not found")
self.computeCounter = 0
self.history = []
self.resets = []
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = None
self.sequenceCounter = 0
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(
params['encoding_num'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'],
classifyWithRandom=params['classify_with_random'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(
numPredictions=params['num_predictions'], seed=params['seed'])
else:
raise Exception("Dataset not found")
self.computeCounter = 0
self.history = []
self.resets = []
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = buildNetwork(params['encoding_num'],
params['num_cells'],
params['encoding_num'],
hiddenclass=LSTMLayer,
bias=True,
outputbias=params['output_bias'],
recurrent=True)
self.trainer = BackpropTrainer(self.net,
dataset=SequentialDataSet(
params['encoding_num'],
params['encoding_num']),
learningrate=0.01,
momentum=0,
verbose=params['verbosity'] > 0)
self.sequenceCounter = 0
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(params['encoding_num'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'],
classifyWithRandom=params[
'classify_with_random'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'],
seed=params['seed'])
else:
raise Exception("Dataset not found")
self.computeCounter = 0
self.history = []
self.resets = []
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = buildNetwork(params['encoding_num'], params['num_cells'],
params['encoding_num'],
hiddenclass=LSTMLayer,
bias=True,
outputbias=params['output_bias'],
recurrent=True)
self.trainer = BackpropTrainer(self.net,
dataset=SequentialDataSet(params['encoding_num'], params['encoding_num']),
learningrate=0.01,
momentum=0,
verbose=params['verbosity'] > 0)
self.sequenceCounter = 0
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(params['encoding_num'],
params['encoding_num_non_random'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'])
elif params['encoding'] == 'sparse-distributed':
self.encoder = SparseDistributedEncoder(params['encoding_num'],
params['encoding_num_non_random'],
params['encoding_active_bits'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'],
seed=params['seed'])
else:
raise Exception("Dataset not found")
self.numLags = params['num_lags']
self.computeCounter = 0
self.history = []
self.resets = []
self.finishInitializeX = False
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = buildNetwork(params['encoding_num'] * params['num_lags'],
params['num_cells'],
params['encoding_num'],
bias=True,
outputbias=True)
# self.trainer = BackpropTrainer(self.net, dataset=trndata, momentum=0.1, verbose=True, weightdecay=0.01)
self.sequenceCounter = 0
def __init__(self, numPredictions, resultsDir):
random.seed(43)
self.numPredictions = numPredictions
if not os.path.exists(resultsDir):
os.makedirs(resultsDir)
self.resultsFile = open(os.path.join(resultsDir, "0.log"), 'w')
self.model = ModelFactory.create(MODEL_PARAMS)
self.model.enableInference({"predictedField": "element"})
self.shifter = InferenceShifter()
self.mapping = getEncoderMapping(self.model)
self.correct = []
self.numPredictedActiveCells = []
self.numPredictedInactiveCells = []
self.numUnpredictedActiveColumns = []
self.iteration = 0
self.perturbed = False
self.randoms = []
self.verbosity = 1
self.dataset = HighOrderDataset(numPredictions=self.numPredictions)
self.sequences = []
self.currentSequence = []
self.replenish_sequence()
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(
params['encoding_num'],
params['encoding_num_non_random'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'])
elif params['encoding'] == 'sparse-distributed':
self.encoder = SparseDistributedEncoder(
params['encoding_num'], params['encoding_num_non_random'],
params['encoding_active_bits'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(
numPredictions=params['num_predictions'], seed=params['seed'])
else:
raise Exception("Dataset not found")
self.numLags = params['num_lags']
self.history = []
self.resets = []
self.finishInitializeX = False
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = initializeELMnet(params['encoding_num'] *
params['num_lags'],
params['encoding_num'],
numNeurons=params['num_cells'])
self.sequenceCounter = 0
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(params['encoding_num'],
params['encoding_num_non_random'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'])
elif params['encoding'] == 'sparse-distributed':
self.encoder = SparseDistributedEncoder(params['encoding_num'],
params['encoding_num_non_random'],
params['encoding_active_bits'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'],
seed=params['seed'])
else:
raise Exception("Dataset not found")
self.numLags = params['num_lags']
self.history = []
self.resets = []
self.finishInitializeX = False
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = initializeELMnet(params['encoding_num'] * params['num_lags'],
params['encoding_num'],
numNeurons=params['num_cells'])
self.sequenceCounter = 0
def reset(self, params, repetition):
random.seed(params['seed'])
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'],
seed=params['seed'])
print "Sequence dataset: "
print " Symbol Number {}".format(self.dataset.numSymbols)
for seq in self.dataset.sequences:
print seq
elif params['dataset'] == 'high-order-long':
self.dataset = LongHighOrderDataset(params['sequence_length'],
seed=params['seed'])
print "Sequence dataset: "
print " Symbol Number {}".format(self.dataset.numSymbols)
for seq in self.dataset.sequences:
print seq
else:
raise Exception("Dataset not found")
self.randomStart = self.dataset.numSymbols + 1
self.randomEnd = self.randomStart + 5000
MODEL_PARAMS['modelParams']['sensorParams']['encoders']['element']\
['categoryList'] = range(self.randomEnd)
# if not os.path.exists(resultsDir):
# os.makedirs(resultsDir)
# self.resultsFile = open(os.path.join(resultsDir, "0.log"), 'w')
if params['verbosity'] > 0:
print " initializing HTM model..."
self.model = ModelFactory.create(MODEL_PARAMS)
self.model.enableInference({"predictedField": "element"})
# self.classifier = SDRClassifier(steps=[1], alpha=0.001)
self.mapping = getEncoderMapping(self.model, self.dataset.numSymbols)
self.numPredictedActiveCells = []
self.numPredictedInactiveCells = []
self.numUnpredictedActiveColumns = []
self.currentSequence = []
self.targetPrediction = []
self.replenish_sequence(params, iteration=0)
self.resets = []
self.randoms = []
self.verbosity = 1
self.sequenceCounter = 0
def reset(self, params, repetition):
random.seed(params['seed'])
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(
numPredictions=params['num_predictions'],
seed=params['seed'],
smallAlphabet=params['use_small_alphabet'])
print "Sequence dataset: "
print " Symbol Number {}".format(self.dataset.numSymbols)
for seq in self.dataset.sequences:
print seq
elif params['dataset'] == 'high-order-long':
self.dataset = LongHighOrderDataset(params['sequence_length'],
seed=params['seed'])
print "Sequence dataset: "
print " Symbol Number {}".format(self.dataset.numSymbols)
for seq in self.dataset.sequences:
print seq
else:
raise Exception("Dataset not found")
self.randomStart = self.dataset.numSymbols + 1
self.randomEnd = self.randomStart + 5000
MODEL_PARAMS['modelParams']['sensorParams']['encoders']['element']\
['categoryList'] = range(self.randomEnd)
# if not os.path.exists(resultsDir):
# os.makedirs(resultsDir)
# self.resultsFile = open(os.path.join(resultsDir, "0.log"), 'w')
if params['verbosity'] > 0:
print " initializing HTM model..."
# print MODEL_PARAMS
self.model = ModelFactory.create(MODEL_PARAMS)
self.model.enableInference({"predictedField": "element"})
# self.classifier = SDRClassifier(steps=[1], alpha=0.001)
print "finish initializing HTM model "
if params['kill_cell_percent'] > 0:
# a hack to use faulty temporal memory instead
self.model._getTPRegion().getSelf()._tfdr = MonitoredFaultyTPShim(
numberOfCols=2048,
cellsPerColumn=32,
newSynapseCount=32,
maxSynapsesPerSegment=128,
maxSegmentsPerCell=128,
initialPerm=0.21,
connectedPerm=0.50,
permanenceInc=0.10,
permanenceDec=0.10,
predictedSegmentDecrement=0.01,
minThreshold=15,
activationThreshold=15,
seed=1960,
)
self.mapping = getEncoderMapping(self.model, self.dataset.numSymbols)
self.numPredictedActiveCells = []
self.numPredictedInactiveCells = []
self.numUnpredictedActiveColumns = []
self.currentSequence = []
self.targetPrediction = []
self.replenish_sequence(params, iteration=0)
self.resets = []
self.randoms = []
self.verbosity = 1
self.sequenceCounter = 0
class Suite(PyExperimentSuite):
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(params['encoding_num'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'],
classifyWithRandom=params[
'classify_with_random'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'])
else:
raise Exception("Dataset not found")
self.computeCounter = 0
self.history = []
self.resets = []
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = None
self.sequenceCounter = 0
def window(self, data, params):
start = max(0, len(data) - params['learning_window'])
return data[start:]
def train(self, params):
"""
Train LSTM network on buffered dataset history
After training, run LSTM on history[:-1] to get the state correct
:param params:
:return:
"""
n = params['encoding_num']
net = buildNetwork(n, params['num_cells'], n,
hiddenclass=LSTMLayer,
bias=True,
outputbias=params['output_bias'],
recurrent=True)
net.reset()
# prepare training dataset
ds = SequentialDataSet(n, n)
trainer = RPropMinusTrainer(net,
dataset=ds,
verbose=params['verbosity'] > 0)
history = self.window(self.history, params)
resets = self.window(self.resets, params)
for i in xrange(1, len(history)):
if not resets[i - 1]:
ds.addSample(self.encoder.encode(history[i - 1]),
self.encoder.encode(history[i]))
if resets[i]:
ds.newSequence()
if len(history) > 1:
trainer.trainEpochs(params['num_epochs'])
net.reset()
# run network on buffered dataset after training to get the state right
for i in xrange(len(history) - 1):
symbol = history[i]
output = net.activate(self.encoder.encode(symbol))
predictions = self.encoder.classify(output, num=params['num_predictions'])
if resets[i]:
net.reset()
return net
def killCells(self, killCellPercent):
"""
kill a fraction of LSTM cells from the network
:param killCellPercent:
:return:
"""
if killCellPercent <= 0:
return
inputLayer = self.net['in']
lstmLayer = self.net['hidden0']
numLSTMCell = lstmLayer.outdim
numDead = round(killCellPercent * numLSTMCell)
zombiePermutation = numpy.random.permutation(numLSTMCell)
deadCells = zombiePermutation[0:numDead]
# remove connections from input layer to dead LSTM cells
connectionInputToHidden = self.net.connections[inputLayer][0]
weightInputToHidden = reshape(connectionInputToHidden.params,
(connectionInputToHidden.outdim,
connectionInputToHidden.indim))
for cell in deadCells:
for dim in range(4):
weightInputToHidden[dim * numLSTMCell + cell, :] *= 0
newParams = reshape(weightInputToHidden,
(connectionInputToHidden.paramdim,))
self.net.connections[inputLayer][0]._setParameters(
newParams, connectionInputToHidden.owner)
# remove dead connections within LSTM layer
connectionHiddenToHidden = self.net.recurrentConns[0]
weightHiddenToHidden = reshape(connectionHiddenToHidden.params,
(connectionHiddenToHidden.outdim,
connectionHiddenToHidden.indim))
for cell in deadCells:
weightHiddenToHidden[:, cell] *= 0
newParams = reshape(weightHiddenToHidden,
(connectionHiddenToHidden.paramdim,))
self.net.recurrentConns[0]._setParameters(
newParams, connectionHiddenToHidden.owner)
# remove connections from dead LSTM cell to output layer
connectionHiddenToOutput = self.net.connections[lstmLayer][0]
weightHiddenToOutput = reshape(connectionHiddenToOutput.params,
(connectionHiddenToOutput.outdim,
connectionHiddenToOutput.indim))
for cell in deadCells:
weightHiddenToOutput[:, cell] *= 0
newParams = reshape(weightHiddenToOutput,
(connectionHiddenToOutput.paramdim,))
self.net.connections[lstmLayer][0]._setParameters(
newParams, connectionHiddenToOutput.owner)
def replenishSequence(self, params, iteration):
if iteration > params['perturb_after']:
sequence, target = self.dataset.generateSequence(iteration, perturbed=True)
else:
sequence, target = self.dataset.generateSequence(iteration)
if (iteration > params['inject_noise_after'] and
iteration < params['stop_inject_noise_after']):
injectNoiseAt = random.randint(1, 3)
sequence[injectNoiseAt] = self.encoder.randomSymbol()
if params['separate_sequences_with'] == 'random':
sequence.append(self.encoder.randomSymbol())
target.append(None)
if params['verbosity'] > 0:
print "Add sequence to buffer"
print "sequence: ", sequence
print "target: ", target
self.currentSequence += sequence
self.targetPrediction += target
def check_prediction(self, topPredictions, targets):
if targets is None:
correct = None
else:
if isinstance(targets, numbers.Number):
correct = targets in topPredictions
else:
correct = True
for prediction in topPredictions:
correct = correct and (prediction in targets)
return correct
def iterate(self, params, repetition, iteration):
element = self.currentSequence.pop(0)
target = self.targetPrediction.pop(0)
# update buffered dataset
self.history.append(element)
# whether there will be a reset signal after the current record
resetFlag = (len(self.currentSequence) == 0 and
params['separate_sequences_with'] == 'reset')
self.resets.append(resetFlag)
# whether there will be a random symbol after the current record
randomFlag = (len(self.currentSequence) == 1 and
params['separate_sequences_with'] == 'random')
self.randoms.append(randomFlag)
if len(self.currentSequence) == 0:
self.replenishSequence(params, iteration)
self.sequenceCounter += 1
# kill cells
killCell = False
if iteration == params['kill_cell_after']:
killCell = True
self.killCells(params['kill_cell_percent'])
# reset compute counter
if iteration % params['compute_every'] == 0:
self.computeCounter = params['compute_for']
if self.computeCounter == 0 or iteration < params['compute_after']:
computeLSTM = False
else:
computeLSTM = True
if computeLSTM:
self.computeCounter -= 1
train = (not params['compute_test_mode'] or
iteration % params['compute_every'] == 0)
if train:
if params['verbosity'] > 0:
print "Training LSTM at iteration {}".format(iteration)
self.net = self.train(params)
# run LSTM on the latest data record
output = self.net.activate(self.encoder.encode(element))
predictions = self.encoder.classify(output, num=params['num_predictions'])
correct = self.check_prediction(predictions, target)
if params['verbosity'] > 0:
print ("iteration: {0} \t"
"current: {1} \t"
"predictions: {2} \t"
"truth: {3} \t"
"correct: {4} \t").format(
iteration, element, predictions, target, correct)
if self.resets[-1]:
if params['verbosity'] > 0:
print "Reset LSTM at iteration {}".format(iteration)
self.net.reset()
return {"current": element,
"reset": self.resets[-1],
"random": self.randoms[-1],
"train": train,
"predictions": predictions,
"truth": target,
"killCell": killCell,
"sequenceCounter": self.sequenceCounter}
class Suite(PyExperimentSuite):
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(params['encoding_num'],
params['encoding_num_non_random'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'])
elif params['encoding'] == 'sparse-distributed':
self.encoder = SparseDistributedEncoder(params['encoding_num'],
params['encoding_num_non_random'],
params['encoding_active_bits'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'],
seed=params['seed'])
else:
raise Exception("Dataset not found")
self.numLags = params['num_lags']
self.history = []
self.resets = []
self.finishInitializeX = False
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = initializeELMnet(params['encoding_num'] * params['num_lags'],
params['encoding_num'],
numNeurons=params['num_cells'])
self.sequenceCounter = 0
def window(self, data, windowSize):
start = max(0, len(data) - windowSize)
return data[start:]
def replenishSequence(self, params, iteration):
if iteration > params['perturb_after']:
sequence, target = self.dataset.generateSequence(params['seed']+iteration,
perturbed=True)
else:
sequence, target = self.dataset.generateSequence(params['seed']+iteration)
if (iteration > params['inject_noise_after'] and
iteration < params['stop_inject_noise_after']):
injectNoiseAt = random.randint(1, 3)
sequence[injectNoiseAt] = self.encoder.randomSymbol()
if params['separate_sequences_with'] == 'random':
sequence.append(self.encoder.randomSymbol(seed=params['seed']+iteration))
target.append(None)
if params['verbosity'] > 0:
print "Add sequence to buffer"
print "sequence: ", sequence
print "target: ", target
self.currentSequence += sequence
self.targetPrediction += target
def check_prediction(self, topPredictions, targets):
if targets is None:
correct = None
else:
if isinstance(targets, numbers.Number):
correct = targets in topPredictions
else:
correct = True
for prediction in topPredictions:
correct = correct and (prediction in targets)
return correct
def killCells(self, killCellPercent):
"""
kill a fraction of LSTM cells from the network
"""
if killCellPercent <= 0:
return
numHiddenNeurons = self.net.numHiddenNeurons
numDead = round(killCellPercent * numHiddenNeurons)
zombiePermutation = numpy.random.permutation(numHiddenNeurons)
deadCells = zombiePermutation[0:numDead]
liveCells = zombiePermutation[numDead:]
self.net.inputWeights = self.net.inputWeights[liveCells, :]
self.net.bias = self.net.bias[:, liveCells]
self.net.beta = self.net.beta[liveCells, :]
self.net.M = self.net.M[liveCells, liveCells]
self.net.numHiddenNeurons = numHiddenNeurons - numDead
def iterate(self, params, repetition, iteration):
currentElement = self.currentSequence.pop(0)
target = self.targetPrediction.pop(0)
# update buffered dataset
self.history.append(currentElement)
# whether there will be a reset signal after the current record
resetFlag = (len(self.currentSequence) == 0 and
params['separate_sequences_with'] == 'reset')
self.resets.append(resetFlag)
# whether there will be a random symbol after the current record
randomFlag = (len(self.currentSequence) == 1 and
params['separate_sequences_with'] == 'random')
self.randoms.append(randomFlag)
if len(self.currentSequence) == 0:
self.replenishSequence(params, iteration)
self.sequenceCounter += 1
# # kill cells
killCell = False
if iteration == params['kill_cell_after']:
killCell = True
self.killCells(params['kill_cell_percent'])
if iteration > params['train_after']:
n = params['encoding_num']
if self.finishInitializeX is False:
# run initialization phase of OS-ELM
NT = params['train_after']
features = numpy.zeros(shape=(NT, n*params['num_lags']))
targets = numpy.zeros(shape=(NT, n))
history = self.window(self.history, NT)
for i in range(params['num_lags'], NT):
targets[i, :] = self.encoder.encode(history[i])
for lags in xrange(params['num_lags']):
shiftTargets = numpy.roll(targets, lags, axis=0)
shiftTargets[:lags, :] = 0
features[:, lags*n:(lags+1)*n] = shiftTargets
self.net.initializePhase(features[:, :], targets[:, :])
if iteration > params['train_after']:
self.finishInitializeX = True
else:
# run sequential learning phase
targets = numpy.zeros((1, params['encoding_num']))
targets[0, :] = self.encoder.encode(self.history[-1])
features = numpy.zeros((1, params['encoding_num'] * params['num_lags']))
for lags in xrange(params['num_lags']):
features[0, lags*n:(lags+1)*n] = self.encoder.encode(
self.history[-1-(lags+1)])
if iteration < params['stop_training_after']:
self.net.train(features, targets)
# run ELM on the latest data record
n = params['encoding_num']
currentFeatures = numpy.zeros((1, params['encoding_num'] * params['num_lags']))
for lags in xrange(min(params['num_lags'], iteration)):
currentFeatures[0, lags*n:(lags+1)*n] = self.encoder.encode(self.history[-1-lags])
output = self.net.predict(currentFeatures)
# print self.net.beta.shape
# print output.shape
# print params['num_predictions']
predictions = self.encoder.classify(output[0],
num=params['num_predictions'])
correct = self.check_prediction(predictions, target)
if params['verbosity'] > 0:
print ("iteration: {0} \t"
"current: {1} \t"
"predictions: {2} \t"
"truth: {3} \t"
"correct: {4} \t").format(
iteration, currentElement, predictions, target, correct)
return {"current": currentElement,
"reset": self.resets[-1],
"random": self.randoms[-1],
"predictions": predictions,
"truth": target,
"killCell": killCell,
"sequenceCounter": self.sequenceCounter}
class Runner(object):
def __init__(self, numPredictions, resultsDir):
random.seed(43)
self.numPredictions = numPredictions
if not os.path.exists(resultsDir):
os.makedirs(resultsDir)
self.resultsFile = open(os.path.join(resultsDir, "0.log"), 'w')
self.model = ModelFactory.create(MODEL_PARAMS)
self.model.enableInference({"predictedField": "element"})
self.shifter = InferenceShifter()
self.mapping = getEncoderMapping(self.model)
self.correct = []
self.numPredictedActiveCells = []
self.numPredictedInactiveCells = []
self.numUnpredictedActiveColumns = []
self.iteration = 0
self.perturbed = False
self.randoms = []
self.verbosity = 1
self.dataset = HighOrderDataset(numPredictions=self.numPredictions)
self.sequences = []
self.currentSequence = []
self.replenish_sequence()
def replenish_sequence(self):
if self.iteration > PERTURB_AFTER and not self.perturbed:
print "PERTURBING"
# self.sequences = generateSequences(self.numPredictions, perturbed=True)
sequence, target = self.dataset.generateSequence(self.iteration,
perturbed=True)
self.perturbed = True
else:
sequence, target = self.dataset.generateSequence(self.iteration)
# self.sequences = generateSequences(self.numPredictions, perturbed=False)
# sequence = random.choice(self.sequences)
if self.iteration > TEMPORAL_NOISE_AFTER:
injectNoiseAt = random.randint(1, 3)
sequence[injectNoiseAt] = random.randrange(RANDOM_START,
RANDOM_END)
# append noise element at end of sequence
random.seed(self.iteration)
print "seed {} start {} end {}".format(self.iteration, RANDOM_START,
RANDOM_END)
sequence.append(random.randrange(RANDOM_START, RANDOM_END))
print "next sequence: ", sequence
self.currentSequence += sequence
def step(self):
element = self.currentSequence.pop(0)
randomFlag = (len(self.currentSequence) == 1)
self.randoms.append(randomFlag)
result = self.shifter.shift(self.model.run({"element": element}))
tm = self.model._getTPRegion().getSelf()._tfdr
tm.mmClearHistory()
# Use custom classifier (uses predicted cells to make predictions)
predictiveColumns = set(
[tm.columnForCell(cell) for cell in tm.predictiveCells])
topPredictions = classify(self.mapping, predictiveColumns,
self.numPredictions)
truth = None if (self.randoms[-1] or len(self.randoms) >= 2
and self.randoms[-2]) else self.currentSequence[0]
correct = None if truth is None else (truth in topPredictions)
data = {
"iteration": self.iteration,
"current": element,
"reset": False,
"random": randomFlag,
"train": True,
"predictions": topPredictions,
"truth": truth
}
self.resultsFile.write(json.dumps(data) + '\n')
self.resultsFile.flush()
if self.verbosity > 0:
print("iteration: {0} \t"
"current: {1} \t"
"predictions: {2} \t"
"truth: {3} \t"
"correct: {4} \t").format(self.iteration, element,
topPredictions, truth, correct)
# replenish sequence
if len(self.currentSequence) == 0:
self.replenish_sequence()
self.iteration += 1
class Suite(PyExperimentSuite):
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(
params['encoding_num'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'],
classifyWithRandom=params['classify_with_random'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(
numPredictions=params['num_predictions'], seed=params['seed'])
else:
raise Exception("Dataset not found")
self.computeCounter = 0
self.history = []
self.resets = []
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = buildNetwork(params['encoding_num'],
params['num_cells'],
params['encoding_num'],
hiddenclass=LSTMLayer,
bias=True,
outputbias=params['output_bias'],
recurrent=True)
self.trainer = BackpropTrainer(self.net,
dataset=SequentialDataSet(
params['encoding_num'],
params['encoding_num']),
learningrate=0.01,
momentum=0,
verbose=params['verbosity'] > 0)
self.sequenceCounter = 0
def window(self, data, params):
start = max(0, len(data) - params['learning_window'])
return data[start:]
def train(self, params):
"""
Train LSTM network on buffered dataset history
After training, run LSTM on history[:-1] to get the state correct
:param params:
:return:
"""
if params['reset_every_training']:
n = params['encoding_num']
self.net = buildNetwork(n,
params['num_cells'],
n,
hiddenclass=LSTMLayer,
bias=True,
outputbias=params['output_bias'],
recurrent=True)
self.net.reset()
# prepare training dataset
ds = SequentialDataSet(params['encoding_num'], params['encoding_num'])
history = self.window(self.history, params)
resets = self.window(self.resets, params)
for i in xrange(1, len(history)):
if not resets[i - 1]:
ds.addSample(self.encoder.encode(history[i - 1]),
self.encoder.encode(history[i]))
if resets[i]:
ds.newSequence()
print "Train LSTM network on buffered dataset of length ", len(history)
if params['num_epochs'] > 1:
trainer = RPropMinusTrainer(self.net,
dataset=ds,
verbose=params['verbosity'] > 0)
if len(history) > 1:
trainer.trainEpochs(params['num_epochs'])
# run network on buffered dataset after training to get the state right
self.net.reset()
for i in xrange(len(history) - 1):
symbol = history[i]
output = self.net.activate(self.encoder.encode(symbol))
self.encoder.classify(output, num=params['num_predictions'])
if resets[i]:
self.net.reset()
else:
self.trainer.setData(ds)
self.trainer.train()
# run network on buffered dataset after training to get the state right
self.net.reset()
for i in xrange(len(history) - 1):
symbol = history[i]
output = self.net.activate(self.encoder.encode(symbol))
self.encoder.classify(output, num=params['num_predictions'])
if resets[i]:
self.net.reset()
def killCells(self, killCellPercent):
"""
kill a fraction of LSTM cells from the network
:param killCellPercent:
:return:
"""
if killCellPercent <= 0:
return
inputLayer = self.net['in']
lstmLayer = self.net['hidden0']
numLSTMCell = lstmLayer.outdim
numDead = round(killCellPercent * numLSTMCell)
zombiePermutation = numpy.random.permutation(numLSTMCell)
deadCells = zombiePermutation[0:numDead]
# remove connections from input layer to dead LSTM cells
connectionInputToHidden = self.net.connections[inputLayer][0]
weightInputToHidden = reshape(
connectionInputToHidden.params,
(connectionInputToHidden.outdim, connectionInputToHidden.indim))
for cell in deadCells:
for dim in range(4):
weightInputToHidden[dim * numLSTMCell + cell, :] *= 0
newParams = reshape(weightInputToHidden,
(connectionInputToHidden.paramdim, ))
self.net.connections[inputLayer][0]._setParameters(
newParams, connectionInputToHidden.owner)
# remove dead connections within LSTM layer
connectionHiddenToHidden = self.net.recurrentConns[0]
weightHiddenToHidden = reshape(
connectionHiddenToHidden.params,
(connectionHiddenToHidden.outdim, connectionHiddenToHidden.indim))
for cell in deadCells:
weightHiddenToHidden[:, cell] *= 0
newParams = reshape(weightHiddenToHidden,
(connectionHiddenToHidden.paramdim, ))
self.net.recurrentConns[0]._setParameters(
newParams, connectionHiddenToHidden.owner)
# remove connections from dead LSTM cell to output layer
connectionHiddenToOutput = self.net.connections[lstmLayer][0]
weightHiddenToOutput = reshape(
connectionHiddenToOutput.params,
(connectionHiddenToOutput.outdim, connectionHiddenToOutput.indim))
for cell in deadCells:
weightHiddenToOutput[:, cell] *= 0
newParams = reshape(weightHiddenToOutput,
(connectionHiddenToOutput.paramdim, ))
self.net.connections[lstmLayer][0]._setParameters(
newParams, connectionHiddenToOutput.owner)
def replenishSequence(self, params, iteration):
if iteration > params['perturb_after']:
sequence, target = self.dataset.generateSequence(params['seed'] +
iteration,
perturbed=True)
else:
sequence, target = self.dataset.generateSequence(params['seed'] +
iteration)
if (iteration > params['inject_noise_after']
and iteration < params['stop_inject_noise_after']):
injectNoiseAt = random.randint(1, 3)
sequence[injectNoiseAt] = self.encoder.randomSymbol()
if params['separate_sequences_with'] == 'random':
sequence.append(
self.encoder.randomSymbol(seed=params['seed'] + iteration))
target.append(None)
if params['verbosity'] > 0:
print "Add sequence to buffer"
print "sequence: ", sequence
print "target: ", target
self.currentSequence += sequence
self.targetPrediction += target
def check_prediction(self, topPredictions, targets):
if targets is None:
correct = None
else:
if isinstance(targets, numbers.Number):
correct = targets in topPredictions
else:
correct = True
for prediction in topPredictions:
correct = correct and (prediction in targets)
return correct
def iterate(self, params, repetition, iteration):
currentElement = self.currentSequence.pop(0)
target = self.targetPrediction.pop(0)
# update buffered dataset
self.history.append(currentElement)
# whether there will be a reset signal after the current record
resetFlag = (len(self.currentSequence) == 0
and params['separate_sequences_with'] == 'reset')
self.resets.append(resetFlag)
# whether there will be a random symbol after the current record
randomFlag = (len(self.currentSequence) == 1
and params['separate_sequences_with'] == 'random')
self.randoms.append(randomFlag)
if len(self.currentSequence) == 0:
self.replenishSequence(params, iteration)
self.sequenceCounter += 1
# kill cells
killCell = False
if iteration == params['kill_cell_after']:
killCell = True
self.killCells(params['kill_cell_percent'])
# reset compute counter
if iteration > 0 and iteration % params['compute_every'] == 0:
self.computeCounter = params['compute_for']
if self.computeCounter == 0 or iteration < params['compute_after']:
computeLSTM = False
else:
computeLSTM = True
if computeLSTM:
self.computeCounter -= 1
train = (not params['compute_test_mode']
or iteration % params['compute_every'] == 0)
if train:
if params['verbosity'] > 0:
print "Training LSTM at iteration {}".format(iteration)
self.train(params)
# run LSTM on the latest data record
output = self.net.activate(self.encoder.encode(currentElement))
if params['encoding'] == 'distributed':
predictions = self.encoder.classify(
output, num=params['num_predictions'])
elif params['encoding'] == 'basic':
predictions = self.encoder.classify(
output, num=params['num_predictions'])
correct = self.check_prediction(predictions, target)
if params['verbosity'] > 0:
print("iteration: {0} \t"
"current: {1} \t"
"predictions: {2} \t"
"truth: {3} \t"
"correct: {4} \t").format(iteration, currentElement,
predictions, target, correct)
if self.resets[-1]:
if params['verbosity'] > 0:
print "Reset LSTM at iteration {}".format(iteration)
self.net.reset()
return {
"iteration": iteration,
"current": currentElement,
"reset": self.resets[-1],
"random": self.randoms[-1],
"train": train,
"predictions": predictions,
"truth": target,
"killCell": killCell,
"sequenceCounter": self.sequenceCounter
}
class Suite(PyExperimentSuite):
def reset(self, params, repetition):
random.seed(params['seed'])
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'])
else:
raise Exception("Dataset not found")
self.randomStart = self.dataset.numSymbols + 1
self.randomEnd = self.randomStart + 5000
MODEL_PARAMS['modelParams']['sensorParams']['encoders']['element']\
['categoryList'] = range(self.randomEnd)
# if not os.path.exists(resultsDir):
# os.makedirs(resultsDir)
# self.resultsFile = open(os.path.join(resultsDir, "0.log"), 'w')
if params['verbosity'] > 0:
print " initializing HTM model..."
self.model = ModelFactory.create(MODEL_PARAMS)
self.model.enableInference({"predictedField": "element"})
self.shifter = InferenceShifter()
self.mapping = getEncoderMapping(self.model)
self.numPredictedActiveCells = []
self.numPredictedInactiveCells = []
self.numUnpredictedActiveColumns = []
self.currentSequence = []
self.targetPrediction = []
self.replenish_sequence(params, iteration=0)
self.randoms = []
self.verbosity = 1
self.sequenceCounter = 0
def replenish_sequence(self, params, iteration):
if iteration > params['perturb_after']:
print "PERTURBING"
sequence, target = self.dataset.generateSequence(iteration, perturbed=True)
else:
sequence, target = self.dataset.generateSequence(iteration)
if (iteration > params['inject_noise_after'] and
iteration < params['stop_inject_noise_after']):
injectNoiseAt = random.randint(1, 3)
sequence[injectNoiseAt] = random.randrange(self.randomStart, self.randomEnd)
if params['verbosity'] > 0:
print "injectNoise ", sequence[injectNoiseAt], " at: ", injectNoiseAt
# separate sequences with random elements
random.seed(iteration)
print "seed {} start {} end {}".format(iteration, self.randomStart, self.randomEnd)
sequence.append(random.randrange(self.randomStart, self.randomEnd))
target.append(None)
if params['verbosity'] > 0:
print "Add sequence to buffer"
print "sequence: ", sequence
print "target: ", target
self.currentSequence += sequence
self.targetPrediction += target
def check_prediction(self, topPredictions, targets):
if targets is None:
correct = None
else:
if isinstance(targets, numbers.Number):
# single target, multiple predictions
correct = targets in topPredictions
else:
# multiple targets, multiple predictions
correct = True
for prediction in topPredictions:
correct = correct and (prediction in targets)
return correct
def iterate(self, params, repetition, iteration):
element = self.currentSequence.pop(0)
target = self.targetPrediction.pop(0)
# whether there will be a random symbol after the current record
randomFlag = (len(self.currentSequence) == 1)
self.randoms.append(randomFlag)
result = self.shifter.shift(self.model.run({"element": element}))
tm = self.model._getTPRegion().getSelf()._tfdr
tm.mmClearHistory()
# Use custom classifier (uses predicted cells to make predictions)
predictiveColumns = set([tm.columnForCell(cell) for cell in tm.predictiveCells])
topPredictions = classify(
self.mapping, predictiveColumns, params['num_predictions'])
# correct = self.check_prediction(topPredictions, target)
truth = None if (self.randoms[-1] or
len(self.randoms) >= 2 and self.randoms[-2]) else self.currentSequence[0]
correct = None if truth is None else (truth in topPredictions)
data = {"iteration": iteration,
"current": element,
"reset": False,
"random": randomFlag,
"train": True,
"predictions": topPredictions,
"truth": target,
"sequenceCounter": self.sequenceCounter}
if params['verbosity'] > 0:
print ("iteration: {0} \t"
"current: {1} \t"
"predictions: {2} \t"
"truth: {3} \t"
"correct: {4} \t").format(
iteration, element, topPredictions, target, correct)
if len(self.currentSequence) == 0:
self.replenish_sequence(params, iteration)
self.sequenceCounter += 1
return data
class Runner(object):
def __init__(self, numPredictions, resultsDir):
random.seed(43)
self.numPredictions = numPredictions
if not os.path.exists(resultsDir):
os.makedirs(resultsDir)
self.resultsFile = open(os.path.join(resultsDir, "0.log"), 'w')
self.model = ModelFactory.create(MODEL_PARAMS)
self.model.enableInference({"predictedField": "element"})
self.shifter = InferenceShifter()
self.mapping = getEncoderMapping(self.model)
self.correct = []
self.numPredictedActiveCells = []
self.numPredictedInactiveCells = []
self.numUnpredictedActiveColumns = []
self.iteration = 0
self.perturbed = False
self.randoms = []
self.verbosity = 1
self.dataset = HighOrderDataset(numPredictions=self.numPredictions)
self.sequences = []
self.currentSequence = []
self.replenish_sequence()
def replenish_sequence(self):
if self.iteration > PERTURB_AFTER and not self.perturbed:
print "PERTURBING"
# self.sequences = generateSequences(self.numPredictions, perturbed=True)
sequence, target = self.dataset.generateSequence(self.iteration, perturbed=True)
self.perturbed = True
else:
sequence, target = self.dataset.generateSequence(self.iteration)
# self.sequences = generateSequences(self.numPredictions, perturbed=False)
# sequence = random.choice(self.sequences)
if self.iteration > TEMPORAL_NOISE_AFTER:
injectNoiseAt = random.randint(1, 3)
sequence[injectNoiseAt] = random.randrange(RANDOM_START, RANDOM_END)
# append noise element at end of sequence
random.seed(self.iteration)
print "seed {} start {} end {}".format(self.iteration, RANDOM_START, RANDOM_END)
sequence.append(random.randrange(RANDOM_START, RANDOM_END))
print "next sequence: ", sequence
self.currentSequence += sequence
def step(self):
element = self.currentSequence.pop(0)
randomFlag = (len(self.currentSequence) == 1)
self.randoms.append(randomFlag)
result = self.shifter.shift(self.model.run({"element": element}))
tm = self.model._getTPRegion().getSelf()._tfdr
tm.mmClearHistory()
# Use custom classifier (uses predicted cells to make predictions)
predictiveColumns = set([tm.columnForCell(cell) for cell in tm.predictiveCells])
topPredictions = classify(self.mapping, predictiveColumns, self.numPredictions)
truth = None if (self.randoms[-1] or
len(self.randoms) >= 2 and self.randoms[-2]) else self.currentSequence[0]
correct = None if truth is None else (truth in topPredictions)
data = {"iteration": self.iteration,
"current": element,
"reset": False,
"random": randomFlag,
"train": True,
"predictions": topPredictions,
"truth": truth}
self.resultsFile.write(json.dumps(data) + '\n')
self.resultsFile.flush()
if self.verbosity > 0:
print ("iteration: {0} \t"
"current: {1} \t"
"predictions: {2} \t"
"truth: {3} \t"
"correct: {4} \t").format(
self.iteration, element, topPredictions, truth, correct)
# replenish sequence
if len(self.currentSequence) == 0:
self.replenish_sequence()
self.iteration += 1
class Suite(PyExperimentSuite):
def reset(self, params, repetition):
random.seed(params['seed'])
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'])
else:
raise Exception("Dataset not found")
# if not os.path.exists(resultsDir):
# os.makedirs(resultsDir)
# self.resultsFile = open(os.path.join(resultsDir, "0.log"), 'w')
if params['verbosity'] > 0:
print " initializing HTM model..."
self.model = ModelFactory.create(MODEL_PARAMS)
self.model.enableInference({"predictedField": "element"})
self.shifter = InferenceShifter()
self.mapping = getEncoderMapping(self.model)
self.currentSequence = self.dataset.generateSequence()
self.numPredictedActiveCells = []
self.numPredictedInactiveCells = []
self.numUnpredictedActiveColumns = []
self.currentSequence = self.dataset.generateSequence()
self.perturbed = False
self.randoms = []
self.verbosity = 1
self.sequenceCounter = 0
def replenish_sequence(self, params, iteration):
if iteration > params['perturb_after'] and not self.perturbed:
print "PERTURBING"
sequence = self.dataset.generateSequence(perturbed=True)
self.perturbed = True
else:
sequence = self.dataset.generateSequence()
if iteration > params['inject_noise_after']:
injectNoiseAt = random.randint(1, 3)
print "injectNoiseAt: ", injectNoiseAt
sequence[injectNoiseAt] = random.randrange(RANDOM_START, RANDOM_END)
print sequence[injectNoiseAt]
sequence.append(random.randrange(RANDOM_START, RANDOM_END))
if params['verbosity'] > 0:
print "Add sequence to buffer"
print sequence
self.currentSequence += sequence
def iterate(self, params, repetition, iteration):
element = self.currentSequence.pop(0)
# whether there will be a random symbol after the current record
randomFlag = (len(self.currentSequence) == 1)
self.randoms.append(randomFlag)
result = self.shifter.shift(self.model.run({"element": element}))
tm = self.model._getTPRegion().getSelf()._tfdr
tm.mmClearHistory()
# Use custom classifier (uses predicted cells to make predictions)
predictiveColumns = set([tm.columnForCell(cell) for cell in tm.predictiveCells])
topPredictions = classify(self.mapping, predictiveColumns, params['num_predictions'])
truth = None if (self.randoms[-1] or
len(self.randoms) >= 2 and self.randoms[-2]
) else self.currentSequence[0]
correct = None if truth is None else (truth in topPredictions)
data = {"iteration": iteration,
"current": element,
"reset": False,
"random": randomFlag,
"train": True,
"predictions": topPredictions,
"truth": truth,
"sequenceCounter": self.sequenceCounter}
if params['verbosity'] > 0:
print ("iteration: {0} \t"
"current: {1} \t"
"predictions: {2} \t"
"truth: {3} \t"
"correct: {4} \t").format(
iteration, element, topPredictions, truth, correct)
if len(self.currentSequence) == 0:
self.replenish_sequence(params, iteration)
self.sequenceCounter += 1
return data
class Suite(PyExperimentSuite):
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(params['encoding_num'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'],
classifyWithRandom=params[
'classify_with_random'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'],
seed=params['seed'])
else:
raise Exception("Dataset not found")
self.numLags = params['num_lags']
self.history = []
self.resets = []
self.finishInitializeX = False
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = initializeELMnet(params['encoding_num'] * params['num_lags'],
params['encoding_num'],
numNeurons=params['num_cells'])
self.sequenceCounter = 0
def window(self, data, windowSize):
start = max(0, len(data) - windowSize)
return data[start:]
def replenishSequence(self, params, iteration):
if iteration > params['perturb_after']:
sequence, target = self.dataset.generateSequence(params['seed']+iteration,
perturbed=True)
else:
sequence, target = self.dataset.generateSequence(params['seed']+iteration)
if (iteration > params['inject_noise_after'] and
iteration < params['stop_inject_noise_after']):
injectNoiseAt = random.randint(1, 3)
sequence[injectNoiseAt] = self.encoder.randomSymbol()
if params['separate_sequences_with'] == 'random':
sequence.append(self.encoder.randomSymbol(seed=params['seed']+iteration))
target.append(None)
if params['verbosity'] > 0:
print "Add sequence to buffer"
print "sequence: ", sequence
print "target: ", target
self.currentSequence += sequence
self.targetPrediction += target
def check_prediction(self, topPredictions, targets):
if targets is None:
correct = None
else:
if isinstance(targets, numbers.Number):
correct = targets in topPredictions
else:
correct = True
for prediction in topPredictions:
correct = correct and (prediction in targets)
return correct
def killCells(self, killCellPercent):
"""
kill a fraction of LSTM cells from the network
"""
if killCellPercent <= 0:
return
numHiddenNeurons = self.net.numHiddenNeurons
numDead = round(killCellPercent * numHiddenNeurons)
zombiePermutation = numpy.random.permutation(numHiddenNeurons)
deadCells = zombiePermutation[0:numDead]
liveCells = zombiePermutation[numDead:]
self.net.inputWeights = self.net.inputWeights[liveCells, :]
self.net.bias = self.net.bias[:, liveCells]
self.net.beta = self.net.beta[liveCells, :]
self.net.M = self.net.M[liveCells, liveCells]
self.net.numHiddenNeurons = numHiddenNeurons - numDead
def iterate(self, params, repetition, iteration):
currentElement = self.currentSequence.pop(0)
target = self.targetPrediction.pop(0)
# update buffered dataset
self.history.append(currentElement)
# whether there will be a reset signal after the current record
resetFlag = (len(self.currentSequence) == 0 and
params['separate_sequences_with'] == 'reset')
self.resets.append(resetFlag)
# whether there will be a random symbol after the current record
randomFlag = (len(self.currentSequence) == 1 and
params['separate_sequences_with'] == 'random')
self.randoms.append(randomFlag)
if len(self.currentSequence) == 0:
self.replenishSequence(params, iteration)
self.sequenceCounter += 1
# # kill cells
killCell = False
if iteration == params['kill_cell_after']:
killCell = True
self.killCells(params['kill_cell_percent'])
if iteration > params['train_after']:
n = params['encoding_num']
if self.finishInitializeX is False:
# run initialization phase of OS-ELM
NT = params['train_after']
features = numpy.zeros(shape=(NT, n*params['num_lags']))
targets = numpy.zeros(shape=(NT, n))
history = self.window(self.history, NT)
for i in range(params['num_lags'], NT):
targets[i, :] = self.encoder.encode(history[i])
for lags in xrange(params['num_lags']):
shiftTargets = numpy.roll(targets, lags, axis=0)
shiftTargets[:lags, :] = 0
features[:, lags*n:(lags+1)*n] = shiftTargets
self.net.initializePhase(features[:, :], targets[:, :])
if iteration > params['train_after']:
self.finishInitializeX = True
else:
# run sequential learning phase
targets = numpy.zeros((1, params['encoding_num']))
targets[0, :] = self.encoder.encode(self.history[-1])
features = numpy.zeros((1, params['encoding_num'] * params['num_lags']))
for lags in xrange(params['num_lags']):
features[0, lags*n:(lags+1)*n] = self.encoder.encode(
self.history[-1-(lags+1)])
if iteration < params['stop_training_after']:
self.net.train(features, targets)
# run ELM on the latest data record
n = params['encoding_num']
currentFeatures = numpy.zeros((1, params['encoding_num'] * params['num_lags']))
for lags in xrange(min(params['num_lags'], iteration)):
currentFeatures[0, lags*n:(lags+1)*n] = self.encoder.encode(self.history[-1-lags])
output = self.net.predict(currentFeatures)
# print self.net.beta.shape
# print output.shape
# print params['num_predictions']
predictions = self.encoder.classify(output[0],
num=params['num_predictions'])
correct = self.check_prediction(predictions, target)
if params['verbosity'] > 0:
print ("iteration: {0} \t"
"current: {1} \t"
"predictions: {2} \t"
"truth: {3} \t"
"correct: {4} \t").format(
iteration, currentElement, predictions, target, correct)
return {"current": currentElement,
"reset": self.resets[-1],
"random": self.randoms[-1],
"predictions": predictions,
"truth": target,
"killCell": killCell,
"sequenceCounter": self.sequenceCounter}
class Suite(PyExperimentSuite):
def reset(self, params, repetition):
random.seed(params['seed'])
if params['encoding'] == 'basic':
self.encoder = BasicEncoder(params['encoding_num'])
elif params['encoding'] == 'distributed':
self.encoder = DistributedEncoder(params['encoding_num'],
params['encoding_num_non_random'],
maxValue=params['encoding_max'],
minValue=params['encoding_min'])
elif params['encoding'] == 'sparse-distributed':
self.encoder = SparseDistributedEncoder(params['encoding_num'],
params['encoding_num_non_random'],
params['encoding_active_bits'])
else:
raise Exception("Encoder not found")
if params['dataset'] == 'simple':
self.dataset = SimpleDataset()
elif params['dataset'] == 'reber':
self.dataset = ReberDataset(maxLength=params['max_length'])
elif params['dataset'] == 'high-order':
self.dataset = HighOrderDataset(numPredictions=params['num_predictions'],
seed=params['seed'])
else:
raise Exception("Dataset not found")
self.numLags = params['num_lags']
self.computeCounter = 0
self.history = []
self.resets = []
self.finishInitializeX = False
self.randoms = []
self.currentSequence = []
self.targetPrediction = []
self.replenishSequence(params, iteration=0)
self.net = buildNetwork(params['encoding_num'] * params['num_lags'],
params['num_cells'],
params['encoding_num'],
bias=True,
outputbias=True)
# self.trainer = BackpropTrainer(self.net, dataset=trndata, momentum=0.1, verbose=True, weightdecay=0.01)
self.sequenceCounter = 0
def window(self, data, windowSize):
start = max(0, len(data) - windowSize)
return data[start:]
def replenishSequence(self, params, iteration):
if iteration > params['perturb_after']:
sequence, target = self.dataset.generateSequence(params['seed']+iteration,
perturbed=True)
else:
sequence, target = self.dataset.generateSequence(params['seed']+iteration)
if (iteration > params['inject_noise_after'] and
iteration < params['stop_inject_noise_after']):
injectNoiseAt = random.randint(1, 3)
sequence[injectNoiseAt] = self.encoder.randomSymbol()
if params['separate_sequences_with'] == 'random':
sequence.append(self.encoder.randomSymbol(seed=params['seed']+iteration))
target.append(None)
if params['verbosity'] > 0:
print "Add sequence to buffer"
print "sequence: ", sequence
print "target: ", target
self.currentSequence += sequence
self.targetPrediction += target
def check_prediction(self, topPredictions, targets):
if targets is None:
correct = None
else:
if isinstance(targets, numbers.Number):
correct = targets in topPredictions
else:
correct = True
for prediction in topPredictions:
correct = correct and (prediction in targets)
return correct
def train(self, params):
"""
Train TDNN network on buffered dataset history
:param params:
:return:
"""
# self.net = buildNetwork(params['encoding_num'] * params['num_lags'],
# params['num_cells'],
# params['encoding_num'],
# bias=True,
# outputbias=True)
ds = SupervisedDataSet(params['encoding_num'] * params['num_lags'],
params['encoding_num'])
history = self.window(self.history, params['learning_window'])
n = params['encoding_num']
for i in xrange(params['num_lags'], len(history)):
targets = numpy.zeros((1, n))
targets[0, :] = self.encoder.encode(history[i])
features = numpy.zeros((1, n * params['num_lags']))
for lags in xrange(params['num_lags']):
features[0, lags * n:(lags + 1) * n] = self.encoder.encode(
history[i - (lags + 1)])
ds.addSample(features, targets)
trainer = BackpropTrainer(self.net,
dataset=ds,
verbose=params['verbosity'] > 0)
if len(history) > 1:
trainer.trainEpochs(params['num_epochs'])
# self.net.reset()
#
# for i in xrange(params['num_lags'], len(history)):
# targets = numpy.zeros((1, n))
# targets[0, :] = self.encoder.encode(self.history[i])
#
# features = numpy.zeros((1, n * params['num_lags']))
# for lags in xrange(params['num_lags']):
# features[0, lags * n:(lags + 1) * n] = self.encoder.encode(
# self.history[i - (lags + 1)])
#
# output = self.net.activate(features[0, :])
# predictions = self.encoder.classify(output, num=params['num_predictions'])
# correct = self.check_prediction(predictions, self.history[i])
# print ("iteration: {0} \t"
# "current: {1} \t"
# "predictions: {2} \t"
# "truth: {3} \t"
# "correct: {4} \t").format(
# i, self.history[i-1], predictions, self.history[i], correct)
def killCells(self, killCellPercent):
"""
kill a fraction of cells from the network
"""
if killCellPercent <= 0:
return
numHiddenNeurons = self.net.numHiddenNeurons
numDead = round(killCellPercent * numHiddenNeurons)
zombiePermutation = numpy.random.permutation(numHiddenNeurons)
deadCells = zombiePermutation[0:numDead]
liveCells = zombiePermutation[numDead:]
self.net.inputWeights = self.net.inputWeights[liveCells, :]
self.net.bias = self.net.bias[:, liveCells]
self.net.beta = self.net.beta[liveCells, :]
self.net.M = self.net.M[liveCells, liveCells]
self.net.numHiddenNeurons = numHiddenNeurons - numDead
def iterate(self, params, repetition, iteration):
currentElement = self.currentSequence.pop(0)
target = self.targetPrediction.pop(0)
# update buffered dataset
self.history.append(currentElement)
# whether there will be a reset signal after the current record
resetFlag = (len(self.currentSequence) == 0 and
params['separate_sequences_with'] == 'reset')
self.resets.append(resetFlag)
# whether there will be a random symbol after the current record
randomFlag = (len(self.currentSequence) == 1 and
params['separate_sequences_with'] == 'random')
self.randoms.append(randomFlag)
if len(self.currentSequence) == 0:
self.replenishSequence(params, iteration)
self.sequenceCounter += 1
killCell = False
if iteration == params['kill_cell_after']:
killCell = True
self.killCells(params['kill_cell_percent'])
# reset compute counter
if iteration > 0 and iteration % params['compute_every'] == 0:
self.computeCounter = params['compute_for']
if self.computeCounter == 0 or iteration < params['compute_after']:
computeNet = False
else:
computeNet = True
if computeNet:
self.computeCounter -= 1
train = iteration % params['compute_every'] == 0
if train:
if params['verbosity'] > 0:
print "Training Network at iteration {}".format(iteration)
self.train(params)
if iteration > params['num_lags']:
# run network on the latest data record
n = params['encoding_num']
currentFeatures = numpy.zeros((params['encoding_num'] * params['num_lags'], ))
for lags in xrange(min(params['num_lags'], iteration)):
currentFeatures[lags*n:(lags+1)*n] = self.encoder.encode(self.history[-1-lags])
output = self.net.activate(currentFeatures)
predictions = self.encoder.classify(output, num=params['num_predictions'])
correct = self.check_prediction(predictions, target)
if params['verbosity'] > 0:
print ("iteration: {0} \t"
"current: {1} \t"
"predictions: {2} \t"
"truth: {3} \t"
"correct: {4} \t").format(
iteration, currentElement, predictions, target, correct)
return {"current": currentElement,
"reset": self.resets[-1],
"random": self.randoms[-1],
"predictions": predictions,
"truth": target,
"killCell": killCell,
"sequenceCounter": self.sequenceCounter}