Search for a better projection near the current projection. — search_better • tourr

Search for a better projection near the current projection.

search_better(
  current,
  alpha = 0.5,
  index,
  tries,
  max.tries = Inf,
  ...,
  method = "linear",
  cur_index = NA
)

Arguments

current: starting projection
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
max.tries: maximum number of iteration before giving up
...: other arguments being passed into the search_better()
method: whether the nearby bases are found by a linear/ geodesic formulation
cur_index: the index value of the current basis

Examples

animate_xy(flea[, 1:6], guided_tour(holes(), search_f = search_better))
#> Converting input data to the required matrix format.
#> Old 1.581977 
#> No better bases found after 25 tries.  Giving up.
#> Final projection: 
#> -0.269  0.767  
#> 0.064  0.484  
#> 0.337  0.277  
#> 0.826  -0.034  
#> 0.067  0.128  
#> -0.350  -0.290  
#> Using half_range 66