qiskit.result.sampled_expectation_value

sampled_expectation_value(dist, oper)

Computes expectation value from a sampled distribution

Note that passing a raw dict requires bit-string keys.

Parameters

• dist (Counts orQuasiDistribution orProbDistribution or dict) – Input sampled distribution
• oper (str or Pauli orPauliOp orPauliSumOp orSparsePauliOp) – The operator for the observable

Returns

The expectation value

Return type

float

Raises

QiskitError – if the input distribution or operator is an invalid type