ispline {cds}

Quadratic monotone spline basis function for given knots.

Description

Calculate basis functions for monotone quadratic splines.

Usage

ispline(xvec, tvec = c(0, 0.5, 1), intercept = TRUE)

Arguments

xvec

Vector at which to evaluate the basis functions.

tvec

Vector of spline knots: lower endpoint, interior knot, upper endpoint.

intercept

Logical; should an intercept be included or not?