This is a small release adapting to new features in ggplot2 4.0.0 and fixing a bug.
element_arrow() is implemented as an S7 class from
ggplot2 4.0.0 onwards.Initial CRAN submission
Several geom functions:
geom_arrow() that works like
geom_path().geom_arrow_segment() that works like
geom_segment()geom_arrow_chain() that works like a
type = "b" plot from base R.geom_arrow_curve() that works like
geom_curve().The function grob_arrow() creates a grid grob that
largely mimics the polylineGrob() grob, with the following
differences.
arrow_{head/fins/mid} controls the shape of the
ornament.length_{head/fins/mid} controls the size of the
ornament.justify controls where an ornament is placed relative
to the line ends.mid_place controls where middle (interior) arrows are
placed.resect{_head/_fins} can shorten the endpoints.force_arrow determines if arrows are drawn on lines
that are too short to accommodate ornaments.shaft_width controls the linewidth for every point in
x and yresect{_head/_fins} arguments.fill controls the
colour of the line, whereas colour controls the colour of
an outline.The arrow_{head/fins/mid} have been promoted from
parameters to aesthetics. Correspondingly, there are now 3 discrete
scales for these 3 aesthetics.
Added the following shapes for ornaments:
arrow_head_wings() that looks like a classic
arrow.arrow_head_line() that are two line protruding from the
tip of the line.arrow_head_minimal() that is just a stumpy
line-end.arrow_fins_feather() two stacked parallelograms.arrow_fins_line() also two lines but in opposite
direction.arrow_fins_minimal() that is just a line-end with a
triangle taken out.arrow_cup() that forms an arc around a point.An annotate_arrow() layer to specifically do arrow
annotations. An element_arrow() to replace line elements in
the theme() by arrows.