gam

Generalized penalized likelihood engine.

The crate exposes flat src/*.rs modules for spline basis generation, reparameterization, PIRLS/REML optimization, joint models, diagnostics/ALO, and HMC.

High-level smooth term support includes:

• Isotropic radial smooths (ThinPlate, Matern, Duchon) for same-scale feature spaces.
• Tensor-product smooths (TensorBSpline) for mixed-scale axes (e.g., space x time).
• Random effects via categorical dummy blocks with identity (ridge) penalties.