Modified igraph plotting code to allow for changes in edge.arrow.width. Edge.arrow.size still not supported Code provided from: jevansbio/igraphhack Git User: jevansbio

# S3 method for igraph2
plot(
  x,
  axes = FALSE,
  add = FALSE,
  xlim = c(-1, 1),
  ylim = c(-1, 1),
  mark.groups = list(),
  mark.shape = 1/2,
  mark.col = grDevices::rainbow(length(mark.groups), alpha = 0.3),
  mark.border = grDevices::rainbow(length(mark.groups), alpha = 1),
  mark.expand = 15,
  ...
)

Arguments

x	The graph to plot.
axes	Logical, whether to plot axes, defaults to FALSE.
add	Logical scalar, whether to add the plot to the current device, or delete the device's current contents first.
xlim	The limits for the horizontal axis, it is unlikely that you want to modify this.
ylim	The limits for the vertical axis, it is unlikely that you want to modify this.
mark.groups	A list of vertex id vectors. It is interpreted as a set of vertex groups. Each vertex group is highlighted, by plotting a colored smoothed polygon around and “under” it. See the arguments below to control the look of the polygons.
mark.shape	A numeric scalar or vector. Controls the smoothness of the vertex group marking polygons. This is basically the ‘shape’ parameter of the `xspline` function, its possible values are between -1 and 1. If it is a vector, then a different value is used for the different vertex groups.
mark.col	A scalar or vector giving the colors of marking the polygons, in any format accepted by `xspline`; e.g. numeric color ids, symbolic color names, or colors in RGB.
mark.border	A scalar or vector giving the colors of the borders of the vertex group marking polygons. If it is `NA`, then no border is drawn.
mark.expand	A numeric scalar or vector, the size of the border around the marked vertex groups. It is in the same units as the vertex sizes. If a vector is given, then different values are used for the different vertex groups.
...	Additional plotting parameters. See igraph.plotting for the complete list.