two.d.array: Convert (p x k x n) data array into 2D data matrix

Description Usage Arguments Details Value Author(s) See Also Examples

View source: R/two.d.array.r

Description

Convert a three-dimensional array of landmark coordinates into a two-dimensional matrix

Usage

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two.d.array(A, sep = ".")

Arguments

A

A 3D array (p x k x n) containing landmark coordinates for a set of specimens

sep

An optional argument for variable labeling, combining landmark labels (e.g., 1, 2, 3, ...) and partial dimension labels (e.g., "x", "y", and "z"), much like the paste function. The default is sep = ".", but this can be changed to any separator. One should make sure to match separators with arrayspecs if switching between matrices and arrays.

Details

This function converts a (p x k x n) array of landmark coordinates into a two-dimensional matrix (n x [p x k]). The latter format of the shape data is useful for performing subsequent statistical analyses in R (e.g., PCA, MANOVA, PLS, etc.). Row labels are preserved if included in the original array.

Value

Function returns a two-dimensional matrix of dimension (n x [p x k]), where rows represent specimens and columns represent variables.

Author(s)

Dean Adams and Emma Sherratt

See Also

arrayspecs

Examples

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data(plethodon) 
plethodon$land    #original data in the form of 3D array

two.d.array(plethodon$land)   # Convert to a 2D data matrix

geomorph documentation built on June 8, 2017, 9:02 a.m.

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