get_trace: Tracing the index over an interpolated planned tour path.

In spinebil: Investigating New Projection Pursuit Index Functions

Tracing the index over an interpolated planned tour path.

Description

Tracing is used to test if the index value varies smoothly over an interpolated tour path. The index value is calculated for the data d in each projection in the interpolated sequence. Note that all index functions must take the data in 2-d matrix format and return the index value.

Usage

get_trace(d, m, index_list, index_labels)

Arguments

d	data
m	list of projection matrices for the planned tour
index_list	list of index functions to calculate for each entry
index_labels	labels used in the output

Value

index values for each interpolation step

Examples

d <- spiral_data(100, 4)
m <- list(basis_matrix(1,2,4), basis_matrix(3,4,4))
index_list <- list(tourr::holes(), tourr::cmass())
index_labels <- c("holes", "cmass")
trace <- get_trace(d, m, index_list, index_labels)
plot_trace(trace)

spinebil documentation built on Nov. 5, 2025, 7:35 p.m.