| layout_backbone {graphlayouts} | R Documentation |
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