Morpho (version 2.1)

regdist: 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 bet

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

See Also

regdist

Examples

library(shapes)
regdist(gorf.dat)