Trace the index value of search/ interpolation points in guided tour optimisation

explore_trace_interp(
dt,
iter = NULL,
color = NULL,
group = NULL,
cutoff = 50,
target_size = 3,
interp_size = 1,
accuracy_x = 5,
accuracy_y = 0.01
)

## Arguments

dt

a data object collected by the projection pursuit guided tour optimisation in tourr

iter

the variable to be plotted on the x-axis

color

the variable to be coloured by

group

the variable to label different runs of the optimiser(s)

cutoff

numeric; if the number of interpolating points is smaller than cutoff, all the interpolation points will be plotted as dots

target_size

numeric; the size of target points in the interpolation

interp_size

numeric; the size of interpolation points

accuracy_x

numeric; If the difference of two neighbour x-labels is smaller than accuracy_x, only one of them will be displayed. Used for better axis label

accuracy_y

numeric; the precision of y-axis label

## Value

a ggplot object for diagnosing how the index value progresses during the interpolation

Other main plot functions: explore_space_pca(), explore_space_tour(), explore_trace_search()
# Compare the trace of interpolated points in two algorithms