The changes from version 0.3.1, the current CRAN release, are:
Make autoplot() the recommended method and deprecate the use of plot(), which remains available for backwards compatibility.
Fix bug in autoplot() which failed to set the title to the name of the object when requested.
Add ‘ggplot2’ and ‘photobiology’ as required dependencies so that they are automatically loaded when ‘ggspectra’ is loaded.
The justification for renaming the plot() methods to autoplot() is that these methods defined in our package match better those of other specializations of autoplot() than of those of plot(), both in terms of the objects returned (ggplots) and in terms of their role as a fast way of plotting objects belonging to classes defined in independently developed packages. Some years ago, early in the development of ‘ggspectra’ it seemed more natural to use plot as the method to specialize.
As most of the methods and functions defined take as input objects belonging to classes defined in package ‘photobiology’ and return objects belonging to classes defined in package ‘ggplot2’, these two packages need in most cases to be loaded for ‘ggspectra’ to work as intended.