spectral_gap: Spectral gap of a graph

Description Usage Arguments Details Value Author(s) Examples

View source: R/spectral.gap.R

Description

The spectral (or eigen) gap of a graph is the absolute difference between the biggest and second biggest eigenvalue of the adjacency matrix. To compare spectral gaps across networks, the fraction can be used.

Usage

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spectral_gap(g, method = "frac")

Arguments

g

igraph object

method

A string, either "frac" or "abs"

Details

The spectral gap is bounded between 0 and 1 if method="frac". The closer the value to one, the bigger the gap.

Value

Numeric value

Author(s)

David Schoch

Examples

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# The fractional spectral gap of a threshold graph is usually close to 1
g <- threshold_graph(50, 0.3)
spectral_gap(g, method = "frac")

netrankr documentation built on Sept. 5, 2021, 5:19 p.m.