dbs function

Derivative of B-spline

Generates the derivative of the B-splines basis matrix.

dbs(
  x,
  derivs = 1L,
  df = NULL,
  knots = NULL,
  degree = 3L,
  intercept = FALSE,
  Boundary.knots = range(x, na.rm = TRUE)
)

Arguments

• x: object of B-splines
• derivs: a number of derivatives
• df: degrees of freedom of B-splines
• knots: a vector of internal knots
• degree: degrees of B-splines
• intercept: a logical vector
• Boundary.knots: a vector of boundary knots

Returns

The function dbs returns a component: - dMat: B-spline matrix

Details

The function dbs performs derivatives of B-splines

Author(s)

Jun Park, jun.park@alumni.iu.edu

Giorgos Bakoyannis, gbakogia@iu.edu