ggquiver 0.5.0

• Fixed automatic vecsize grid detection incorrectly rescaling arrows for irregularly spaced data (e.g. GPS coordinates) whenever the x- and y-spacings happened to coincide.
• Automatic vecsize grid detection now warns instead of erroring when a grid size can’t be determined (e.g. a single data point), leaving arrows unscaled.
• geom_quiver() now hints to use coord_fixed()/coord_equal() if needed (#10).
• Legend keys now show an arrowhead, matching the arrows drawn in the panel.

ggquiver 0.4.0

• Arrows now respect scale transformations on x/y aesthetics (#13).
• Arrows now support grid::arrow() appearance options (#14).

ggquiver 0.3.3

• Remove suggest for ggmap due to upstream api requirements.

ggquiver 0.3.2 (6 December 2021)

• Improve usage of plot coordinate system when scaling arrow size (#9).
• Fixed angle of line when centered arrows are used.

ggquiver 0.3.1 (25 November 2021)

• Fixed issue with plotting resized vectors using the vecsize option (#8).

ggquiver 0.3.0 (29 October 2021)

• Improved handling of non cartesian coordinate systems.
• Fixed issue with plotting arrows on ggmap::qmplot() (#7).
• Performance improvements.

Version 0.2.0 (5 February 2019)

• Changed ggplot2 to import
• Updated README to reflect ggmap changes

Version 0.1.0 (9 August 2017)

• Added automatic grid detection
• Added a NEWS.md.
• Added geom_quiver() and stat_quiver()
• Added unit tests