Generate coordinates to place the vertices of a graph in a star-shape
Source:R/layout.R
layout_as_star.RdA simple layout generator, that places one vertex in the center of a circle and the rest of the vertices equidistantly on the perimeter.
Usage
layout_as_star(graph, center = V(graph)[1], order = NULL)
as_star(...)Arguments
- graph
The graph to layout.
- center
The id of the vertex to put in the center. By default it is the first vertex.
- order
Numeric vector, the order of the vertices along the perimeter. The default ordering is given by the vertex ids.
- ...
Arguments to pass to
layout_as_star().
Details
It is possible to choose the vertex that will be in the center, and the order of the vertices can be also given.
See also
layout() and layout.drl() for other layout
algorithms, plot.igraph() and tkplot() on how to
plot graphs and star() on how to create ring graphs.
Other graph layouts:
add_layout_(),
component_wise(),
layout_(),
layout_as_bipartite(),
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_lgl(),
layout_with_mds(),
layout_with_sugiyama(),
merge_coords(),
norm_coords(),
normalize()
Author
Gabor Csardi csardi.gabor@gmail.com
Examples
g <- make_star(10)
layout_as_star(g)
#> [,1] [,2]
#> [1,] 0.0000000 0.0000000
#> [2,] 1.0000000 0.0000000
#> [3,] 0.7660444 0.6427876
#> [4,] 0.1736482 0.9848078
#> [5,] -0.5000000 0.8660254
#> [6,] -0.9396926 0.3420201
#> [7,] -0.9396926 -0.3420201
#> [8,] -0.5000000 -0.8660254
#> [9,] 0.1736482 -0.9848078
#> [10,] 0.7660444 -0.6427876
## Alternative form
layout_(g, as_star())
#> [,1] [,2]
#> [1,] 0.0000000 0.0000000
#> [2,] 1.0000000 0.0000000
#> [3,] 0.7660444 0.6427876
#> [4,] 0.1736482 0.9848078
#> [5,] -0.5000000 0.8660254
#> [6,] -0.9396926 0.3420201
#> [7,] -0.9396926 -0.3420201
#> [8,] -0.5000000 -0.8660254
#> [9,] 0.1736482 -0.9848078
#> [10,] 0.7660444 -0.6427876