migrate: This function returns a data frame that has moved migrants
In MarianaLag/Mlag: Tools Related to the Spatial Analysis of Genetic Marker Data

Description Usage Arguments Value Note Author(s)

This is a general function that moves migrants among strata according to either a constant migration rate or a set of migration rates defined by a migration matrix. All this does is adjust the stratum labels of individuals, no mating is conducted.

1	migrate(data, stratum = "Population", m = 0.1, relabel = TRUE)

`data`	A `data.frame` object with at least a stratum column. All other columns in the data frame are left untouched
`stratum`	The column designating stratum.
`m`	Either a rate of migration as a numeric OR a migration matrix whose columns and row names are the same as those in the passed stratum column.
`relabel`	A flag (default TRUE) that relabels individuals after they have been moved between populations. Used for testing only.

A data.frame with all the data the same except for the shuffled stratum.

This is a simple transition matrix approach to migration. The migration rate times the population size MUST result in at least a whole number or else no migrants are produced. It uses round() to find the whole number of individuals to migrate. This means that if you have a migration rate that has less than one individual it will NEVER occur, not that it will occur at a less than one individual per generation frequency. You must adjust your migration rates directly for that (e.g., the user has the entire power, not the this function).

Rodney J. Dyer rjdyer@vcu.edu

MarianaLag/Mlag documentation built on Feb. 13, 2020, 12:30 a.m.