`edge.length.density.stiffness()` constructs stiffnesses for edge-only geodesic-MDS layouts. It turns positive edge lengths into spring stiffnesses normalized to mean one. The `"density"` method emphasizes edge lengths near the empirical edge-length density mode, and `mix` provides a continuation path from that density-weighted signal to uniform stiffness.
edge.length.density.stiffness(
edge_weights,
method = c("density", "uniform", "distance_power"),
mix = 0,
bandwidth = NULL,
density_n = 512L,
transform = c("identity", "sqrt", "log"),
distance_power = 0,
stiffness_floor = 0,
stiffness_ceiling = Inf
)A list with `stiffness`, raw signal diagnostics, estimated mode, and clipping/normalization metadata.
Positive numeric edge lengths.
Stiffness rule. `"density"` estimates an empirical density, `"uniform"` returns equal stiffnesses, and `"distance_power"` uses `(w / median(w))^distance_power`.
Continuation parameter in `[0, 1]`. `0` uses the selected method; `1` returns uniform stiffness.
Optional bandwidth passed to `stats::density()`.
Number of evaluation points for `stats::density()`.
Optional transformation of the raw density/power signal before mixing and normalization.
Exponent for `method = "distance_power"`.
Optional clipping bounds applied before the final mean-one normalization.