Search for a better projection based on Poss, 1995
search_posse(
current,
alpha = 0.5,
index,
tries,
max.tries = 300,
cur_index = NA,
...
)starting projection
the angle used to search the target basis from the current basis
index function
the counter of the outer loop of the opotimiser
maximum number of iteration before giving up
the index value of the current basis
other arguments being passed into the search_better()