Construct a diffusion-time grid for HKS/diffusion descriptors

Usage

hks_time_grid(
  values,
  q,
  mode = c("auto", "fixed"),
  time_range = c(0.1, 50),
  spacing = c("log", "linear"),
  time_scale = 1,
  eigen_tol = 1e-12
)

Arguments

values: Numeric vector of eigenvalues (typically Laplacian eigenvalues).
q: Integer number of time points.
mode: Either `"auto"` (derive a time range from the spectrum) or `"fixed"` (use `time_range`).
time_range: Length-2 positive numeric vector giving min/max times when `mode="fixed"`.
spacing: Either `"log"` (default; typical for HKS) or `"linear"`.
time_scale: Positive scalar multiplier applied to the resulting times.
eigen_tol: Positive threshold; eigenvalues `<= eigen_tol` are ignored when `mode="auto"`.

Value

Numeric vector of length `q`.