make.anc: Create design matrix (internal function)

In ghthomas/motmot: Models of Trait Macroevolution on Trees

Description

This is an internal function to generate the design matrix required to define different means for each hypothesised rate category.

Usage

make.anc(y, x, data = NULL, common.mean = FALSE)

Arguments

y	The response variable - typically a continuous trait.
x	The explanatory (discrete) variable used to define the hypothesised rate categories.
data	A data frame containing (minimally) the x and y variables as columns with species names as rownames.
common.mean	a logical specififying whether each rate category should have its own mean (common.mean=FALSE) or all categories should have the same mean (common.mean=FALSE). See Thomas et al. (2009) for a discussion on the impact of assumptions about mean on rate estimates.

Value

x	A design matrix

Author(s)

Gavin Thomas

References

Thomas GH, Freckleton RP, & Szekely T. 2006. Comparative analyses of the influence of developmental mode on phenotypic diversification rates in shorebirds. Proceedings of the Royal Society B 273, 1619-1624.

Thomas GH, Meiri S, & Phillimore AB. 2009. Body size diversification in Anolis: novel environments and island effects. Evolution 63, 2017-2030.

ghthomas/motmot documentation built on July 31, 2018, 12:11 a.m.