This is a wrapper function used by explore_space_pca() and
should be be called directly by the user
add_end(dt, end_size = 5, end_alpha = 1, end_color = NULL, ...)a wrapper for drawing end points in explore_space_pca()
A data object from the running the optimisation algorithm in guided tour
numeric; the size of the end point
numeric; the alpha of the end point
the variable to be coloured by
other aesthetics inherent from explore_space_pca()
Other draw functions:
add_anchor(),
add_anno(),
add_dir_search(),
add_interp(),
add_interp_last(),
add_interrupt(),
add_search(),
add_space(),
add_start(),
add_theo()