pearl.interpolate

Module for interpolation calculations used in the PEARL model.

pearl.interpolate.restricted_cubic_spline_var(x: numpy.typing.NDArray.typing.Any, knots: numpy.typing.NDArray.typing.Any, i: int) → Any

Return a pandas Series of the i-th restricted cubic spline variable for numpy array x with knots. Adapted from: https:github.com/harrelfe/Hmisc/blob/master/R/rcspline.eval.s

Parameters:

x (np.array) – Array to apply spline interpolation to.
knots (np.array) – Array containing the values of the knots.
i (int) – The knot for calculation.

Returns:

The interpolated array.

Return type:

np.array

Raises:

ValueError – Raises an error if i is not 1 or 2 as this is undefined for cubic splines.

pearl.interpolate.restricted_quadratic_spline_var(x: numpy.typing.NDArray.typing.Any, knots: numpy.typing.NDArray.typing.Any, i: int) → Any