layout_backbone: backbone graph layout

In graphlayouts: Additional Layout Algorithms for Network Visualizations

backbone graph layout

Description

emphasizes a hidden group structure if it exists in the graph. Calculates a layout for a sparsified network only including the most embedded edges. Deleted edges are added back after the layout is calculated.

Usage

layout_as_backbone(g, keep = 0.2, backbone = TRUE)

layout_igraph_backbone(g, keep = 0.2, backbone = TRUE, circular)

Arguments

g	igraph object
keep	fraction of edges to keep during backbone calculation
backbone	logical. Return edge ids of the backbone (Default: TRUE)
circular	not used

Details

The layout_igraph_* function should not be used directly. It is only used as an argument for plotting with 'igraph'. 'ggraph' natively supports the layout.

Value

list of xy coordinates and vector of edge ids included in the backbone

References

Nocaj, A., Ortmann, M., & Brandes, U. (2015). Untangling the hairballs of multi-centered, small-world online social media networks. Journal of Graph Algorithms and Applications: JGAA, 19(2), 595-618.

Examples

library(igraph)

g <- sample_islands(9, 20, 0.4, 9)
g <- simplify(g)
V(g)$grp <- as.character(rep(1:9, each = 20))
bb <- layout_as_backbone(g, keep = 0.4)

# add backbone links as edge attribute
E(g)$col <- FALSE
E(g)$col[bb$backbone] <- TRUE

graphlayouts documentation built on Sept. 30, 2024, 9:22 a.m.