public void TestActivateCorrectlyPredictiveCells()
{
TemporalMemory tm = new TemporalMemory();
Connections cn = new Connections();
Parameters p = GetDefaultParameters();
p.Apply(cn);
TemporalMemory.Init(cn);
int[] previousActiveColumns = { 0 };
int[] activeColumns = { 1 };
Cell cell4 = cn.GetCell(4);
HashSet <Cell> expectedActiveCells = new HashSet <Cell> {
cell4
}; //Stream.of(cell4).collect(Collectors.toSet());
DistalDendrite activeSegment = cn.CreateSegment(cell4);
cn.CreateSynapse(activeSegment, cn.GetCell(0), 0.5);
cn.CreateSynapse(activeSegment, cn.GetCell(1), 0.5);
cn.CreateSynapse(activeSegment, cn.GetCell(2), 0.5);
cn.CreateSynapse(activeSegment, cn.GetCell(3), 0.5);
ComputeCycle cc = tm.Compute(cn, previousActiveColumns, true);
Assert.IsTrue(cc.PredictiveCells().SetEquals(expectedActiveCells));
ComputeCycle cc2 = tm.Compute(cn, activeColumns, true);
Assert.IsTrue(cc2.ActiveCells().SetEquals(expectedActiveCells));
}
public void testZeroActiveColumns()
{
TemporalMemory tm = new TemporalMemory();
Connections cn = new Connections();
Parameters p = GetDefaultParameters();
p.Apply(cn);
TemporalMemory.Init(cn);
int[] previousActiveColumns = { 0 };
Cell cell4 = cn.GetCell(4);
DistalDendrite activeSegment = cn.CreateSegment(cell4);
cn.CreateSynapse(activeSegment, cn.GetCell(0), 0.5);
cn.CreateSynapse(activeSegment, cn.GetCell(1), 0.5);
cn.CreateSynapse(activeSegment, cn.GetCell(2), 0.5);
cn.CreateSynapse(activeSegment, cn.GetCell(3), 0.5);
ComputeCycle cc = tm.Compute(cn, previousActiveColumns, true);
Assert.IsFalse(cc.ActiveCells().Count == 0);
Assert.IsFalse(cc.WinnerCells().Count == 0);
Assert.IsFalse(cc.PredictiveCells().Count == 0);
int[] zeroColumns = new int[0];
ComputeCycle cc2 = tm.Compute(cn, zeroColumns, true);
Assert.IsTrue(cc2.ActiveCells().Count == 0);
Assert.IsTrue(cc2.WinnerCells().Count == 0);
Assert.IsTrue(cc2.PredictiveCells().Count == 0);
}
public void testNoChangeToMatchingSegmentsInPredictedActiveColumn()
{
TemporalMemory tm = new TemporalMemory();
Connections cn = new Connections();
Parameters p = GetDefaultParameters();
p.Apply(cn);
TemporalMemory.Init(cn);
int[] previousActiveColumns = { 0 };
int[] activeColumns = { 1 };
Cell[] previousActiveCells = { cn.GetCell(0), cn.GetCell(1), cn.GetCell(2), cn.GetCell(3) };
Cell expectedActiveCell = cn.GetCell(4);
HashSet <Cell> expectedActiveCells = new HashSet <Cell> {
expectedActiveCell
}; // Stream.of(expectedActiveCell).collect(Collectors.toCollection(HashSet < Cell >::new));
Cell otherBurstingCell = cn.GetCell(5);
DistalDendrite activeSegment = cn.CreateSegment(expectedActiveCell);
cn.CreateSynapse(activeSegment, previousActiveCells[0], 0.5);
cn.CreateSynapse(activeSegment, previousActiveCells[1], 0.5);
cn.CreateSynapse(activeSegment, previousActiveCells[2], 0.5);
cn.CreateSynapse(activeSegment, previousActiveCells[3], 0.5);
DistalDendrite matchingSegmentOnSameCell = cn.CreateSegment(expectedActiveCell);
Synapse s1 = cn.CreateSynapse(matchingSegmentOnSameCell, previousActiveCells[0], 0.3);
Synapse s2 = cn.CreateSynapse(matchingSegmentOnSameCell, previousActiveCells[1], 0.3);
DistalDendrite matchingSegmentOnOtherCell = cn.CreateSegment(otherBurstingCell);
Synapse s3 = cn.CreateSynapse(matchingSegmentOnOtherCell, previousActiveCells[0], 0.3);
Synapse s4 = cn.CreateSynapse(matchingSegmentOnOtherCell, previousActiveCells[1], 0.3);
ComputeCycle cc = tm.Compute(cn, previousActiveColumns, true);
Assert.IsTrue(cc.PredictiveCells().SetEquals(expectedActiveCells));
tm.Compute(cn, activeColumns, true);
Assert.AreEqual(0.3, s1.GetPermanence(), 0.01);
Assert.AreEqual(0.3, s2.GetPermanence(), 0.01);
Assert.AreEqual(0.3, s3.GetPermanence(), 0.01);
Assert.AreEqual(0.3, s4.GetPermanence(), 0.01);
}