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qiskit.ignis.mitigation.CTMPExpvalMeasMitigator.assignment_matrix¶

CTMPExpvalMeasMitigator.assignment_matrix(qubits=None)[source]¶

Return the measurement assignment matrix for specified qubits.

The assignment matrix is the stochastic matrix $A$ which assigns a noisy measurement probability distribution to an ideal input measurement distribution: $P(i|j) = \langle i | A | j \rangle$ .

Parameters: qubits (Optional[List[int]]) – Optional, qubits being measured for operator expval.
Returns: the assignment matrix A.
Return type: np.ndarray