regfun_grad {incidental}

Beta regularization function gradient

Description

This function computes regularization penalty term gradient based on the betas and difference order.

Usage

regfun_grad(beta, regularization_order = 2)

Arguments

beta

spline parameter vector length num_params

regularization_order

An integer (typically 0, 1, 2), indicating differencing order for L2 regularization of spline parameters. Default is 2 for second derivative penalty.

Value

scalar regularization value