def testAdaptShouldRemoveSegments(self):
"""
Test that connections are generated on predefined segments.
"""
random = Random(1981)
active_cells = np.array(random.sample(
np.arange(0, NUM_CELLS, 1, dtype="uint32"), 40),
dtype="uint32")
active_cells.sort()
presynaptic_input = list(range(0, 10))
inputSDR = SDR(1024)
inputSDR.sparse = presynaptic_input
connections = Connections(NUM_CELLS, 0.51)
for i in range(NUM_CELLS):
seg = connections.createSegment(i, 1)
for cell in active_cells:
segments = connections.segmentsForCell(cell)
self.assertEqual(len(segments), 1,
"Segments were prematurely destroyed.")
segment = segments[0]
connections.adaptSegment(segment, inputSDR, 0.1, 0.001, True)
segments = connections.segmentsForCell(cell)
self.assertEqual(len(segments), 0, "Segments were not destroyed.")
def testAdaptShouldRemoveSegments(self):
"""
Test that connections are generated on predefined segments.
"""
random = Random(1981)
active_cells = np.array(random.sample(np.arange(0, NUM_CELLS, 1, dtype="uint32"), 40), dtype="uint32")
active_cells.sort()
presynaptic_input = list(range(0, 10))
inputSDR = SDR(1024)
inputSDR.sparse = presynaptic_input
connections = Connections(NUM_CELLS, 0.51)
for i in range(NUM_CELLS):
seg = connections.createSegment(i, 2)
seg = connections.createSegment(i, 2) #create 2 segments on each cell
for cell in active_cells:
segments = connections.segmentsForCell(cell)
self.assertEqual(len(segments), 2, "Segments were prematurely destroyed.")
segment = segments[0]
numSynapsesOnSegment = len(segments)
connections.adaptSegment(segment, inputSDR, 0.1, 0.001, pruneZeroSynapses=True, segmentThreshold=1) #set to =1 so that segments get always deleted in this test
segments = connections.segmentsForCell(cell)
self.assertEqual(len(segments), 1, "Segments were not destroyed.")
def testNumConnectedSynapses(self):
"""
Test that connections are generated on predefined segments.
"""
random = Random(1981)
active_cells = np.array(random.sample(
np.arange(0, NUM_CELLS, 1, dtype="uint32"), 40),
dtype="uint32")
active_cells.sort()
presynaptic_input = list(range(0, 10))
presynaptic_input_set = set(presynaptic_input)
inputSDR = SDR(1024)
inputSDR.sparse = presynaptic_input
connections = Connections(NUM_CELLS, 0.2)
for i in range(NUM_CELLS):
seg = connections.createSegment(i, 1)
for cell in active_cells:
segments = connections.segmentsForCell(cell)
segment = segments[0]
for c in presynaptic_input:
connections.createSynapse(segment, c, 0.1)
connections.adaptSegment(segment, inputSDR, 0.1, 0.0, False)
connected_synapses = connections.numConnectedSynapses(segment)
self.assertEqual(connected_synapses, len(presynaptic_input),
"Missing synapses")
presynaptic_input1 = list(range(0, 5))
presynaptic_input_set1 = set(presynaptic_input1)
inputSDR.sparse = presynaptic_input1
total_connected = 0
for cell in active_cells:
segments = connections.segmentsForCell(cell)
segment = segments[0]
connections.adaptSegment(segment, inputSDR, 0.0, 0.1, False)
connected_synapses = connections.numConnectedSynapses(segment)
self.assertEqual(connected_synapses, len(presynaptic_input1),
"Missing synapses")
total_connected += connected_synapses
connected_synapses = connections.numSynapses(segment)
self.assertEqual(connected_synapses, len(presynaptic_input),
"Missing synapses")
self.assertEqual(total_connected,
len(presynaptic_input1) * 40, "Missing synapses")
def testAdaptShouldDecrementSynapses(self):
"""
Test that connections are generated on predefined segments.
"""
random = Random(1981)
active_cells = np.array(random.sample(
np.arange(0, NUM_CELLS, 1, dtype="uint32"), 40),
dtype="uint32")
active_cells.sort()
presynaptic_input = list(range(0, 10))
presynaptic_input_set = set(presynaptic_input)
inputSDR = SDR(1024)
inputSDR.sparse = presynaptic_input
connections = Connections(NUM_CELLS, 0.51)
for i in range(NUM_CELLS):
seg = connections.createSegment(i, 1)
for cell in active_cells:
segments = connections.segmentsForCell(cell)
segment = segments[0]
for c in presynaptic_input:
connections.createSynapse(segment, c, 0.1)
connections.adaptSegment(segment, inputSDR, 0.1, 0.0, False)
presynamptic_cells = self._getPresynapticCells(
connections, segment, 0.2)
self.assertEqual(presynamptic_cells, presynaptic_input_set,
"Missing synapses")
presynaptic_input1 = list(range(0, 5))
presynaptic_input_set1 = set(presynaptic_input1)
inputSDR.sparse = presynaptic_input1
for cell in active_cells:
segments = connections.segmentsForCell(cell)
segment = segments[0]
connections.adaptSegment(segment, inputSDR, 0.0, 0.1, False)
presynamptic_cells = self._getPresynapticCells(
connections, segment, 0.2)
self.assertEqual(presynamptic_cells, presynaptic_input_set1,
"Too many synapses")
presynamptic_cells = self._getPresynapticCells(
connections, segment, 0.1)
self.assertEqual(presynamptic_cells, presynaptic_input_set,
"Missing synapses")
def testComputeActivity(self):
"""
Test that connections are generated on predefined segments.
"""
random = Random(1981)
active_cells = np.array(random.sample(
np.arange(0, NUM_CELLS, 1, dtype="uint32"), 40),
dtype="uint32")
active_cells.sort()
presynaptic_input = list(range(0, 10))
presynaptic_input_set = set(presynaptic_input)
inputSDR = SDR(1024)
inputSDR.sparse = presynaptic_input
l = len(presynaptic_input)
connections = Connections(NUM_CELLS, 0.51, False)
for i in range(NUM_CELLS):
seg = connections.createSegment(i, 1)
numActiveConnectedSynapsesForSegment = connections.computeActivity(
inputSDR, False)
for count in numActiveConnectedSynapsesForSegment:
self.assertEqual(count, 0, "Segment should not be active")
for cell in active_cells:
segments = connections.segmentsForCell(cell)
segment = segments[0]
for c in presynaptic_input:
connections.createSynapse(segment, c, 0.1)
numActiveConnectedSynapsesForSegment = connections.computeActivity(
inputSDR, False)
for count in numActiveConnectedSynapsesForSegment:
self.assertEqual(count, 0, "Segment should not be active")
for cell in active_cells:
segments = connections.segmentsForCell(cell)
segment = segments[0]
connections.adaptSegment(segment, inputSDR, 0.5, 0.0, False)
active_cells_set = set(active_cells)
numActiveConnectedSynapsesForSegment = connections.computeActivity(
inputSDR, False)
for cell, count in enumerate(numActiveConnectedSynapsesForSegment):
if cell in active_cells_set:
self.assertEqual(count, l, "Segment should be active")
else:
self.assertEqual(count, 0, "Segment should not be active")