estimate_rank_of_mrca_naive

estimate_rank_of_mrca_naive(coincident_ranks_from_first_disparity_through_first_commonality: Iterator[int], p_differentia_collision: float, prior: Literal['arbitrary'] | PriorBase) → float | None[source]

Compute a simple, fast estimate the rank of the most recent common ancestor (MRCA).

Parameters

coincident_ranks_from_first_disparity_through_first_commonality : typing.Iterator[int]

Iterator of integer values indicating the coincident ranks between two taxa.

Inclusive to first disparity and first commonality.

p_differentia_collisionfloat

The multiplicative inverse of the number of possible differentia.

priortyping.Union[typing.Literal[“arbitrary”], PriorBase]

Prior expectation for the distribution of MRCA generation between hereditary stratigraphic columns.

Not used for this calculation.

Returns

typing.Optional[float]: Estimated rank of the MRCA, or None if the two hereditary stratigraphic artifacts definitively share no common ancestor.

Notes

This function estimates the rank of the MRCA by computing the mean of the first retained disparate rank and the last retained common rank, with a correction factor for upper bound exclusivity.