Morpho: vecx – R documentation

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vecx

convert an 3D array into a matrix and back

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

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

`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 like: `x1,y1,z1,x2,y2,z2,...` set `byrow=TRUE`
`revert`	revert the process and convert a matrix with vectorized landmarks back into an array.
`lmdim`	number of columns for reverting

returns a matrix with one row per specimen

Stefan Schlager

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

Calculations and Visualisations Related to Geometric Morphometrics

v2.8

GPL-2

Authors

Stefan Schlager [aut, cre, cph], Gregory Jefferis [ctb], Dryden Ian [cph]

Initial release

2020-02-26