search_polish: Search very locally to find slightly better projections to...

In tourr: Tour Methods for Multivariate Data Visualisation

Search very locally to find slightly better projections to polish a broader search.

Description

Search very locally to find slightly better projections to polish a broader search.

Usage

search_polish(
  current,
  alpha = 0.5,
  index,
  tries,
  polish_max_tries = 30,
  cur_index = NA,
  n_sample = 100,
  polish_cooling = 1,
  ...
)

Arguments

current	the current projection basis
alpha	the angle used to search the target basis from the current basis
index	index function
tries	the counter of the outer loop of the opotimiser
polish_max_tries	maximum number of iteration before giving up
cur_index	the index value of the current basis
n_sample	number of samples to generate
polish_cooling	percentage of reduction in polish_alpha when no better basis is found
...	other arguments being passed into the search_polish()

Examples

data(t1)
best_proj <- t1[, , dim(t1)[3]]
attr(best_proj, "data") <- NULL
best_proj <- unclass(drop(best_proj))
animate_xy(
  flea[, 1:6],
  guided_tour(holes()),
    search_f = search_polish(
         polish_max_tries = 5),
  start = best_proj
)

tourr documentation built on May 29, 2024, 11:22 a.m.