tweenr is a small collection of functions to help you in creating
intermediary representations of your data, i.e. interpolating states of data.
As such it's a great match for packages such as animate and gganimate, since
it can work directly with data.frames of data, but it also provide fast and
efficient interpolaters for numeric, date, datetime and colour that are
vectorized and thus more efficient to use than the build in interpolation
functions (mainly approx and
colorRamp).
The main functions for data.frames are tween_states,
tween_elements and tween_appear, while the
standard interpolaters can be found at tween