Heuristic tail estimate of a lag table

The historical lt_tail_bound() name is retained for compatibility, but its value is a heuristic tail estimate, not a certified mathematical error bound. What the package computes is a norm-based suffix accumulation with a multiplier of 1.5; andreou2026smoother eq. 3.19 is a spectral-radius condition, and individual spectral radii do not establish contraction of an arbitrary ordered product. The value is therefore a diagnostic on the retained record, not a guarantee about the cells the truncation dropped.

Usage

lt_tail_bound(x, j = NULL)

Arguments

x

A lag_table object.

j

Optional integer index of a single anchor time; NULL returns the estimate at every time.

Value

Numeric vector of heuristic tail estimates.

Examples

m <- aci_dyad_model()
sim <- simulate(m, seed = 1, t_end = 2, dt = 0.01)
ob <- as_obs(sim)
tb <- lag_table(m, ob, mode = "forward")
#> Warning: No init$cov supplied; using a diffuse prior. Its opening steps are prior-dominated; a prior far wider than the hidden state's own scale can also destabilise the explicit step, which is a refusal rather than a window to discard.
head(lt_tail_bound(tb))
#> [1] 0 0 0 0 0 0