geomorph (version 4.0.8)

geomorph.data.frame: Create a data frame with shape data

Description

A list similar to a data frame to facilitate analysis of shape data.

Usage

geomorph.data.frame(...)

Arguments

...

a list of objects to include in the data frame.

Author

Michael Collyer

Details

This function produces a list that can be used like a data frame in other analytical functions. The purpose is similar to the function, data.frame, but without the constraint that data must conform to an n (observations) x p (variables) matrix. Rather, the list produced is constrained only by n. List objects can be Procrustes shape variables, matrices, variables, distance matrices, and phylogenetic trees. Results from gpagen can be directly imported into a geomorph.data.frame to utilize the coordinates and centroid size as variables. (See Examples)

Examples

if (FALSE) {
data(plethodon) 
Y.gpa <- gpagen(plethodon$land, PrinAxes = FALSE)
gdf <- geomorph.data.frame(Y.gpa)
attributes(gdf)

gdf <- geomorph.data.frame(Y.gpa, species = plethodon$species, 
site = plethodon$site)
attributes(gdf)

# Using geomorph.data.frame to facilitate analysis
anova(procD.lm(coords ~ Csize + species * site, data = gdf))
}