regdist: correlation between shape space and tangent space

In Morpho: Calculations and Visualisations Related to Geometric Morphometrics

correlation between shape space and tangent space

Description

performs a partial Procrustes superimposition of landmark data and calculates the correlation between tangent and shape space.

Usage

regdist(dataarray, plot = TRUE, main = "", rho = "angle", dist.mat.out = FALSE)

Arguments

dataarray	Input k x m x n real array, where k is the number of points, m is the number of dimensions, and n is the sample size.
plot	Logical: whether to plot the distances between observations.
main	character string: Title of the plot.
rho	chose how to calculate distances in shape space. Options: "riemdist"=Riemannian distance (function from the shapes package-takes along time to calculate), "angle"=calculates the angle between shape vectors, "sindist"=sinus of length of residual vector between shape vectors.
dist.mat.out	Logical: If TRUE, output will contain distance matrices.

Value

cor	correlation coefficient between distances in shape space and tangent space
procSS	Procrustes Sums of Squares (of full procrustes distance)
tanSS	Tangent Sums of Squares
rhoSS	Procrustes Sums of Squares (of angle)
euc.dist	distance matrix of euclidean distance in Tangent space
proc.dist	distance matrix of Procrustes distance in Shape space

Author(s)

Stefan Schlager

See Also

regdist

Examples

if (require(shapes)) {
regdist(gorf.dat)
}

Morpho documentation built on Feb. 16, 2023, 10:51 p.m.