Apply Layout to Network

Apply a layout algorithm to compute node positions.

Usage

sn_layout(network, layout, seed = 42, ...)

Arguments

network: A cograph_network object, matrix, data.frame, or igraph object. Matrices and other inputs are auto-converted.
layout: Layout algorithm name (see Details), a two-letter or full igraph layout name, an igraph layout function, a CographLayout object, or a coordinate matrix / data frame with one row per node and x, y in its first two columns. Anything else is an error.
seed: Random seed for deterministic layouts. Default 42. Set NULL for random.
...: Additional arguments passed to the layout function.

Value

Modified cograph_network object.

Details

Built-in Layouts

spring: Force-directed layout (Fruchterman-Reingold style). Good general-purpose layout. Default.
oval/ellipse: Nodes arranged around an ellipse.
circle: Nodes arranged in a circle. Good for small networks or when structure is less important.
groups: Circular layout with grouped nodes clustered together.
grid: Nodes in a regular grid.
random: Random positions. Useful as starting point.
star: Central node with others arranged around it.
bipartite: Two-column layout for bipartite networks.
gephi/gephi_fr: Gephi-style force-directed layout.

igraph Layouts

Two-letter codes for igraph layouts: "kk" (Kamada-Kawai), "fr" (Fruchterman-Reingold), "drl", "mds", "ni" (nicely), "tr" (tree), "ci" (circle), etc.

You can also pass igraph layout functions directly or use full names like "layout_with_kk".

Examples

adj <- matrix(c(0, 1, 1, 1, 0, 1, 1, 1, 0), nrow = 3)
cograph(adj) |> sn_layout("circle") |> splot()


# Custom coordinates
coords <- matrix(c(0, 0, 1, 0, 0.5, 1), ncol = 2, byrow = TRUE)
cograph(adj) |> sn_layout(coords) |> splot()