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.
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