layout_target: Target Layout (focal-node, topological)

In cograph: Analysis and Visualization of Complex Networks

Target Layout (focal-node, topological)

Description

Port of qgraph's flow() layout. One node of interest (the target) is placed alone, then every other node is drawn in successive levels ordered by unweighted graph distance (BFS hops) from it. This shows how the target node connects out into the rest of the network.

Usage

layout_target(network, target = NULL, horizontal = TRUE, equalize = TRUE, ...)

Arguments

network	A CographNetwork or cograph_network object.
target	Node of interest, given as a label (character) or 1-based index. When NULL (default) the highest-degree node is used.
horizontal	Logical. If TRUE (default) levels flow left to right with the target node on the left; if FALSE they flow top to bottom.
equalize	Logical. If TRUE (default) nodes are evenly spaced within each level.
...	Additional arguments (ignored).

Details

Unlike qgraph's implementation, weights are binarized for layering (only connectivity matters) and disconnected nodes are placed in an extra trailing level instead of raising an error.

Value

Data frame with x, y coordinates, one row per node.

Examples

adj <- matrix(c(0, 1, 1, 0, 1, 0, 0, 1,
                1, 0, 0, 0, 0, 1, 0, 0), nrow = 4, byrow = TRUE)
net <- CographNetwork$new(adj)
layout_target(net, target = 1)

cograph documentation built on Sept. 30, 2026, 5:08 p.m.