qiskit.result.marginal_counts

marginal_counts(result, indices=None, inplace=False, format_marginal=False)

Marginalize counts from an experiment over some indices of interest.

Parameters

• result (dict or Result) – result to be marginalized (a Result object or a dict(str, int) of counts).

• indices (list(int) or None) – The bit positions of interest to marginalize over. If None (default), do not marginalize at all.

• inplace (bool) – Default: False. Operates on the original Result argument if True, leading to loss of original Job Result. It has no effect if result is a dict.

• format_marginal (bool) – Default: False. If True, takes the output of marginalize and formats it with placeholders between cregs and for non-indices.

Returns

A Result object or a dictionary with

the observed counts, marginalized to only account for frequency of observations of bits of interest.

Return type

Result or dict(str, int)

Raises

QiskitError – in case of invalid indices to marginalize over.