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import numpy as np
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class ConditionalIntensityMatrix:
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def __init__(self, dimension, state_residence_times, state_transition_matrix):
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self.state_residence_times = state_residence_times
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self.state_transition_matrix = state_transition_matrix
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#self.cim = np.zeros(shape=(dimension, dimension), dtype=float)
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self.cim = self.state_transition_matrix.astype(np.float)
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def update_state_transition_count(self, element_indx):
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#print(element_indx)
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#self.state_transition_matrix[element_indx[0]][element_indx[1]] += 1
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self.state_transition_matrix[element_indx] += 1
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def update_state_residence_time_for_state(self, state, time):
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#print("Time updating In state", state, time)
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self.state_residence_times[state] += time
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def compute_cim_coefficients(self):
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np.fill_diagonal(self.cim, self.cim.diagonal() * -1)
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self.cim = ((self.cim.T + 1) / (self.state_residence_times + 1)).T
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def __repr__(self):
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return 'CIM:\n' + str(self.cim)
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