def reset(self):
    """
    Clear all cell and segment activity.
    """
    self.activeCells = np.empty(0, dtype="uint32")
    self.winnerCells = np.empty(0, dtype="uint32")
    self.predictedCells = np.empty(0, dtype="uint32")
    self.predictedActiveCells = np.empty(0, dtype="uint32")
    self.activeBasalSegments = np.empty(0, dtype="uint32")
    self.activeApicalSegments = np.empty(0, dtype="uint32")
    self.matchingBasalSegments = np.empty(0, dtype="uint32")
    self.matchingApicalSegments = np.empty(0, dtype="uint32")
    self.basalPotentialOverlaps = np.empty(0, dtype="int32")
    self.apicalPotentialOverlaps = np.empty(0, dtype="int32")
Clear all cell and segment activity.