Morpho (version 2.1)

vecx: convert an 3D array into a matrix and back

Description

converts a 3D-array (e.g. containing landmark coordinates) into a matrix, one row per specimen or reverse this.

Usage

vecx(x, byrow = FALSE, revert = FALSE, lmdim)

Arguments

x

array or matrix

byrow

logical: if TRUE, the resulting vector for each specimen will be x1,y1,z1,x2,y2,z2,..., and x1,x2,...,y1,y2,...,z1,z2,... otherwise (default). The same is for reverting the process: if the matrix contains the coordinates as rows

revert

revert the process and convert a matrix with vectorized landmarks back into an array.

lmdim

number of columns for reverting

Value

• returns a matrix with one row per specimen

Examples

library(shapes)
data <- vecx(gorf.dat)
#revert the procedure
gdat.restored <- vecx(data,revert=TRUE,lmdim=2)
range(gdat.restored-gorf.dat)