Description Usage Arguments Details See Also Examples
Instead of choosing new projections at random like the grand tour, the guided tour always tries to find a projection that is more interesting than the current projection.
1 2 | guided_tour(index_f, d = 2, alpha = 0.5, cooling = 0.99,
max.tries = 25, search_f = search_geodesic, ...)
|
index_f |
the index function to optimise. |
d |
target dimensionality |
alpha |
the initial size of the search window, in radians |
cooling |
the amount the size of the search window should be adjusted by after each step |
max.tries |
the maximum number of unsuccessful attempts to find a better projection before giving up |
search_f |
the search strategy to use |
... |
arguments sent to the search_f |
Currently the index functions only work in 2d.
Usually, you will not call this function directly, but will pass it to
a method that works with tour paths like animate
,
save_history
or render
.
cmass
, holes
and lda_pp
for examples of index functions. The function should take a numeric
matrix and return a single number, preferrably between 0 and 1.
search_geodesic
, search_better
,
search_better_random
for different search strategies
1 2 3 4 5 6 7 8 9 | animate_xy(flea[, 1:3], guided_tour(holes), sphere = TRUE)
animate_xy(flea[, 1:6], guided_tour(holes), sphere = TRUE)
animate_dist(flea[, 1:6], guided_tour(holes, 1), sphere = TRUE)
# save_history is particularly useful in conjunction with the
# guided tour as it allows us to look at the tour path in many different
# ways
f <- flea[, 1:3]
tries <- replicate(5, save_history(f, guided_tour(holes)), simplify = FALSE)
|
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