Target Layout (focal-node, topological) — layout

Adapts the flow() layout of qgraph. One node of interest (the target) is placed alone, and every other node is placed in successive levels ordered by its unweighted graph distance (number of hops) from the target. Edge direction is ignored. The layout shows how the target node connects to 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 node with the most neighbors is used. A label that is not found or an index out of range raises an error.
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).

Value

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

Details

Weights are binarized for layering, so only connectivity matters. Nodes that cannot be reached from the target are placed in one extra level after the last. qgraph raises an error for such nodes.

Examples

layout_target(CographNetwork$new(regulation_net), target = "Plan")
#>    x         y
#> 1  2 0.2500000
#> 2  0 0.5000000
#> 3  1 0.1428571
#> 4  2 0.5000000
#> 5  2 0.7500000
#> 6  1 0.2857143
#> 7  1 0.4285714
#> 8  1 0.5714286
#> 9  1 0.7142857
#> 10 1 0.8571429