r-cran-tweenr 1.0.1-2build1 (s390x binary) in ubuntu groovy

 In order to create smooth animation between states of data,
 tweening is necessary. This package provides a range of functions for
 creating tweened data that can be used as basis for animation. Furthermore
 it adds a number of vectorized interpolaters for common R data
 types such as numeric, date and colour.