minmax_laplace {treestats}

Laplacian Matrix properties

Description

Calculates the eigenvalues of the Laplacian Matrix, where the Laplacian matrix is the matrix representation of a graph, in this case a phylogeny. When the R package RSpectra is available, a faster calculation can be used, which does not calculate all eigenvalues, but only the maximum and minimum. As such, when using this option, the vector of all eigenvalues is not returned

Usage

minmax_laplace(phy, use_rspectra = FALSE)

Arguments

phy

phylo object or ltable

use_rspectra

boolean to indicate whether the helping package RSpectra should be used, in which case only the minimum and maximum values are returned

Value

List with the minimum and maximum eigenvalues

References

Chindelevitch, Leonid, et al. "Network science inspires novel tree shape statistics." Plos one 16.12 (2021): e0259877.