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igraph (version 1.0.0)

layout_nicely: Choose an appropriate graph layout algorithm automatically

Description

This function tries to choose an appropriate graph layout algorithm for the graph, automatically, based on a simple algorithm. See details below.

Usage

layout_nicely(graph, dim = 2, ...)
nicely(...)

Arguments

graph
The input graph
dim
Dimensions, should be 2 or 3.
...
For layout_nicely the extra arguments are passed to the real layout function. For nicely all argument are passed to layout_nicely.

Value

  • A numeric matrix with two or three columns.

Details

layout_nicely tries to choose an appropriate layout function for the supplied graph, and uses that to generate the layout. The current implementation works like this:
  1. If the graph has a graph attribute calledlayout, then this is used. If this attribute is an R function, then it is called, with the graph and any other extra arguments.
  2. Otherwise, if the graph has vertex attributes calledxandy, then these are used as coordinates. If the graph has an additionalzvertex attribute, that is also used.
  3. Otherwise, if the graph is connected and has less than 1000 vertices, the Fruchterman-Reingold layout is used, by callinglayout_with_fr.
  4. Otherwise the DrL layout is used,layout_with_drlis called.

See Also

plot.igraph

Other graph layouts: add_layout_; as_bipartite, layout.bipartite, layout_as_bipartite; as_star, layout.star, layout_as_star; as_tree, layout_as_tree; component_wise; in_circle, layout_in_circle; layout.davidson.harel, layout_with_dh, with_dh; layout.gem, layout_with_gem, with_gem; layout.graphopt, layout_with_graphopt, with_graphopt; layout.grid, layout.grid.3d, layout.grid.3d, layout_on_grid, on_grid; layout.mds, layout_with_mds, with_mds; layout.merge, layout_components, merge_coords, piecewise.layout, piecewise.layout; layout.norm, norm_coords; layout.sugiyama, layout_with_sugiyama, with_sugiyama; layout_on_sphere, on_sphere; layout_randomly, randomly; layout_with_fr, with_fr; layout_with_kk, with_kk; layout_with_lgl, with_lgl; layout, layout_, print.igraph_layout_modifier, print.igraph_layout_spec; normalize