anc_match_masks: Return ancestry-matrix-zone masks for different relationship...

In CKMRpop: Forward-in-Time Simulation and Tallying of Pairwise Relationships

Description

This returns a list of two logical matrices. The first catches the zone that is above the diagonal (when plotted with ind_1 on the x-axis and ind_2 on the y-axis). These correspond to ind_2 being the "older" member of the pair than ind_1. The second catches the zone on the lower diagonal. If the zone spans the diagonal, then each matrix returned in the list is the same.

Usage

anc_match_masks(num_generations, R)

Arguments

num_generations	the number of generations to go back. 0 = self; 1 = to the parents; 2 = to the grandparents; 3 = to the great grandparents, etc.
R	the relationship whose zones you want to mask with TRUEs in the output matrices. See below for the possible choices.

Details

The relationships whose zones we are equipped to deal with go out to n=4 generation, and are named (and ordered) as follows, which is the order in which they appear in the package data vector relationship_zone_names:

• Se: self. This is as far as it goes with num_generations = 0

• PO: parent-offspring

• Si: sibling. This is as far as it goes with num_generations = 1.

• GP: grandparental

• A : avuncular (aunt-niece)

• FC: first cousin. This is as far as it goes with num_generations = 2.

• GGP: great-grandparental

• GA: great-avuncular (great-aunt/great-niece, etc).

• FCr1: first-cousin once removed

• SC: second cousin. This is as far as it goes with num_generations = 3

• GGGP: great-great-grandparental

• GGA: great-great-avuncular

• FCr2: first cousin twice removed

• SCr1: second cousin once removed

• TC: third cousin At this point the additional zones for num_generations = 3 have not been implemented.

Value

This function returns a list of two matrices. Each one has FALSEs everywhere except in the zones corresponding to the relationship, where it has TRUEs. As mentioned above, the first matrix captures the zones where ind_2 is the "older" one and the second matrix captures the zones where ind_1 is the "older" one. For the symmetrical relationships (Se, Si, FC, etc.) the two matrices in the list are identical.

CKMRpop documentation built on July 17, 2021, 5:07 p.m.