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RBMStack.py
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RBMStack.py
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from RBM import *
class RBMStack(object):
def __init__(self, architecture):
self.stack = []
previous_layer_size = architecture[0]
if len(architecture) > 1:
for layer_size in architecture[1:]:
self.stack.append(RBM(previous_layer_size, layer_size))
previous_layer_size = layer_size
def Stack(self):
return self.stack
def Depth(self):
return len(self.stack)
def Cycle(self, initial_state):
return self.CycleDepth(initial_state, self.Depth())
def CycleDepth(self, initial_state, depth):
return self.stack[0].Sample(self.CycleContinuous(initial_state, depth))
def CycleContinuous(self, initial_state, depth):
data = initial_state
for layer_index in range(depth):
rbm = self.stack[layer_index]
data = rbm.Sample(rbm.PropHidden(data))
for layer_index in reversed(range(1, depth)):
rbm = self.stack[layer_index]
data = rbm.Sample(rbm.PropVisible(data))
rbm = self.stack[0]
return rbm.PropVisible(data)