This is a wrapper function used by explore_space_pca() and
should be be called directly by the user
add_anchor(dt, anchor_size = 3, anchor_alpha = 0.5, anchor_color = NULL, ...)a wrapper for drawing anchor points in explore_space_pca()
A data object from the running the optimisation algorithm in guided tour
numeric; the size of the anchor points
numeric; the alpha of the anchor points
the variable to be coloured by
other aesthetics inherent from explore_space_pca()
Other draw functions:
add_anno(),
add_dir_search(),
add_end(),
add_interp(),
add_interp_last(),
add_interrupt(),
add_search(),
add_space(),
add_start(),
add_theo()