Credit Transition Matrix

WHENWhen defining a StateSpace with an explicit definition list

ACTIONverify state indices in each tuple are 0-based contiguous integers starting from 0

CONSEQUENCETransition matrix estimators and downstream stages use 0-based integer indexing. Non-contiguous or non-zero-based indices will cause index out-of-bounds errors or misaligned matrix operations when accessing rows and columns

WHENWhen accessing states.cardinality for transition matrix operations

ACTIONverify cardinality is an integer equal to the number of states in the definition list

CONSEQUENCETransitionMatrix validation and estimator loops depend on cardinality matching the definition length. Mismatch causes index errors or uninitialized matrix dimensions

WHENWhen estimators use state space cardinality for matrix initialization

ACTIONverify the transition matrix dimension matches state space cardinality

CONSEQUENCEEstimators like SimpleEstimator and AalenJohansen use states.cardinality to create numpy arrays. Mismatch between matrix dimension and state cardinality causes index errors during estimation