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