distributed_lag_list — distributed_lag

Create distributed lag terms

Usage

distributed_lag_list(
  x,
  n_lag,
  lag_max,
  df,
  degree,
  internal_knots,
  boundary_knots,
  complete_basis,
  periodic,
  derivs,
  integral
)

Arguments

x: numeric vector to lag
n_lag: number of lag terms
lag_max: integer the maximum lag
df: Degree of freedom that equals to the column number of the returned matrix. One can specify df rather than knots, then the function chooses df - degree - as.integer(intercept) internal knots at suitable quantiles of x ignoring missing values and those x outside of the boundary. For periodic splines, df - as.integer(intercept) internal knots will be chosen at suitable quantiles of x relative to the beginning of the cyclic intervals they belong to (see Examples) and the number of internal knots must be greater or equal to the specified degree - 1. If internal knots are specified via knots, the specified df will be ignored.
degree: A nonnegative integer specifying the degree of the piecewise polynomial. The default value is 3 for cubic splines. Zero degree is allowed for piecewise constant basis functions.
internal_knots: location of internal knots
boundary_knots: location of boundary knots
complete_basis: logical intercept?
periodic: A logical value. If TRUE, the periodic splines will be returned. The default value is FALSE.
derivs: A nonnegative integer specifying the order of derivatives of splines basis function. The default value is 0.
integral: A logical value. If TRUE, the corresponding integrals of spline basis functions will be returned. The default value is FALSE. For periodic splines, the integral of each basis is integrated from the left boundary knot.

Value

List of distributed lags