Attribute formulas for vertex.nsides, vertex.size, and edge.width now
evaluate the right-hand side against the graph's attributes, so expressions
such as edge.width = ~ log1p(weight) or vertex.size = ~ degree ^ 2 work in
addition to bare attribute names. Previously any non-trivial right-hand side
failed with a cryptic the condition has length > 1 error. Missing attributes
now produce a clear, informative message.
vertex.color = ~ attr now draws a legend appropriate to the attribute type:
a categorical key for discrete attributes (factor, logical, low-cardinality
integer) and a continuous color bar for continuous ones.
Documentation overhaul: nplot() now documents the formula interface for
mapping vertex/edge aesthetics from graph attributes, the README highlights
what sets netplot apart, a package-level help page was added, and the pkgdown
reference is organized by feature.
New vignette "formulas" demonstrating how to color, shape, and size vertices
(and scale edge widths) from graph attributes using formulas.
nplot.network() now uses the "weight" edge attribute for edge.width
by default (like nplot.igraph() already did), so edge widths reflect edge
weights instead of being drawn uniformly. edge.width values are also
explicitly re-applied to each edge grob after color post-processing to keep
the drawn line widths robust. Closes #17.
edge.width.range, vertex.size.range, and vertex.label.range now accept
NULL to suppress scaling and use the supplied values as-is.
Fixed vertex.rot, which was truncated to an integer and so ignored
fractional (radian) rotations; the named "square" shape orientation was
corrected as well.
edge.line.lty is now validated to be length 1 or one value per plotted
edge, and is subset correctly when sample.edges drops edges.
Invalid arguments passed to nplot() now raise an error.
Figures with legends are not drawn twice.
Values supported by nplot() are now included in all methods (helps with
argument completion).
Changed some default values for better results.
The arguments skip.vertex, skip.edges, and skip.arrows now work as
documented.
New function nplot_legend() helps to add legends to the figure.
New nplot() method for matrices.
New feature: Gradients.
The argument sample.edges now work as expected.
vertex.color, vertex.size, and vertex.nsides now accepts formulas.
edge.width now accepts formulas.
New function: locate_vertex().