Methods for quick visualization

Vertex attributes "x" and "y" are used as the cartesian coordinates for plotting. They can be set by layout functions beforehand, or within augment(). plot() internally calls augment().

Usage

# S3 method for class 'igraph_ptr'
augment(x, layout = NULL, ...)

# S3 method for class 'igraph_ptr'
plot(x, ..., lwd = 0.6, cex = 6, col = "#cccccc", pch = 16)

Arguments

x

An igraph_ptr object.

layout

A layout function or a Vattr(x)-like data.frame with "x" and "y". If not provided, layout_nicely() is applied, which does nothing if "x" and "y" are already set in vertex attributes.

...

Extra arguments passed to the layout function.

lwd

Passed to ggplot2::geom_segment().

cex, col, pch

Passed to ggplot2::geom_point() and ggplot2::geom_text().

Value

augment() returns a data frame to be used with ggplot2::ggplot().

plot.igraph_ptr() returns a ggplot object.

See also

layout_random() and others for layout functions.

Examples

g = graph_tree(5L) |> layout_reingold_tilford()

augment(g)
#> # A tibble: 5 × 6
#>    from    to     x     y  xend  yend
#>   <int> <int> <dbl> <dbl> <dbl> <dbl>
#> 1     1     1   0       0   0       0
#> 2     1     2  -0.5     1   0       0
#> 3     1     3   0.5     1   0       0
#> 4     2     4  -1       2  -0.5     1
#> 5     2     5   0       2  -0.5     1

plot(g) + ggplot2::theme_minimal(base_size = 14)