estimate_ranks_since_mrca_with

estimate_ranks_since_mrca_with(focal: Union[HereditaryStratigraphicColumn, HereditaryStratigraphicSpecimen], other: Union[HereditaryStratigraphicColumn, HereditaryStratigraphicSpecimen], estimator: str, prior: str | Any) → float | None

How many generations have elapsed since focal’s most recent common ancestor with other?

More specifically, estimate the number of depositions elapsed along focal column’s line of descent since the most recent common ancestor with other.

Parameters

estimator{“maximum_likelihood”, “unbiased”}

What estimation method should be used? Options are “maximum_likelihood” or “unbiased”.

See estimate_ranks_since_mrca_with for discussion of estimator options.

prior : {“arbitrary”, “uniform”} or object implementing prior interface

Prior probability density distribution over possible generations of the MRCA.

See estimate_ranks_since_mrca_with for discussion of prior options.

Returns

float, optional

Estimate of generations elapsed since MRCA, unless first and second definitively share no common ancestor in which case None will be returned.

See Also

calc_ranks_since_mrca_bounds_with :

Calculates confidence intervals for generations elapsed along one column’s line of descent since most recent common ancestor with another column.

does_definitively_have_no_common_anestor :

Does the hereditary stratigraphic record definitively prove that first and second could not possibly share a common ancestor?