cograph (version 2.7.2)

sn_layout: Apply Layout to Network

Description

Apply a layout algorithm to compute node positions.

Usage

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

Value

Modified cograph_network object.

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.

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".

See Also

cograph for network creation, sn_nodes for node customization, sn_edges for edge customization, sn_theme for visual themes, splot and soplot for plotting

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()