Skip to contents

Large Graph Layout

Source: R/layout.R
layout_with_lgl.Rd

A layout generator for larger graphs.

Usage

layout_with_lgl(
  graph,
  ...,
  maxiter = 150,
  maxdelta = NULL,
  area = NULL,
  coolexp = 1.5,
  repulserad = NULL,
  cellsize = NULL,
  root = NULL
)

Arguments

graph

The input graph

...

These dots are for future extensions and must be empty.

maxiter

The maximum number of iterations to perform (150).

maxdelta

The maximum change for a vertex during an iteration. The default NULL uses the number of vertices.

area

The area of the surface on which the vertices are placed. The default NULL uses the square of the number of vertices.

coolexp

The cooling exponent of the simulated annealing (1.5).

repulserad

Cancellation radius for the repulsion. The default NULL uses the area times the number of vertices.

cellsize

The size of the cells for the grid. When calculating the repulsion forces between vertices only vertices in the same or neighboring grid cells are taken into account. The default NULL uses the square root of the square root of the area.

root

The ID of the vertex to place at the middle of the layout. The default value is -1 which means that a random vertex is selected.

Value

A numeric matrix with two columns and as many rows as vertices.

Details

layout_with_lgl() is for large connected graphs, it is similar to the layout generator of the Large Graph Layout software (https://lgl.sourceforge.net/).

vcount()

See also

with_lgl() to build a lazy layout specification for add_layout_().

Other graph layouts: add_layout_(), component_wise(), layout_(), layout_as_bipartite(), layout_as_star(), layout_as_tree(), layout_in_circle(), layout_nicely(), layout_on_grid(), layout_on_sphere(), layout_randomly(), layout_with_dh(), layout_with_fr(), layout_with_gem(), layout_with_graphopt(), layout_with_kk(), layout_with_mds(), layout_with_sugiyama(), merge_coords(), norm_coords(), normalize()

Author

Gabor Csardi csardi.gabor@gmail.com