xspline.xspl#

class xspline.xspl.XSpline(knots, degree, ldegree=None, rdegree=None, coef=None)[source]#

Bases: BasisXFunction

Main class for xspline functions.

Parameters:

  • knots (tuple[float, ...]) – Knots of the spline.

  • degree (int) – Degree of the spline.

  • ldegree (int | None) – Left extrapolation polynomial degree.

  • rdegree (int | None) – Right extrapolation polynomial degree.

  • coef (ndarray[Any, dtype[_ScalarType_co]] | None) – The coefficients for linear combining the spline basis.

get_design_mat(x, order=0, check_args=True)[source]#

Create design matrix from spline basis functions.

Parameters:

  • x (ndarray[Any, dtype[_ScalarType_co]]) – Data points.

  • order (int) – Order of differentiation/integration.

  • check_args (bool) – If True, it will automatically check and parse the arguments.

Returns:

Design matrix from spline basis functions.

Return type:

describe