MATLAB code for Monte Carlo spline construction with uncertainty propagation

MATLAB code for constructing a splined record and associated uncertainties from data with uncertainties in both x and y. The spline is generated using a Monte Carlo approach incorporating bootstrapping to propagate uncertainties and estimate errors. User inputs include the x and y data and their uncertainties, the desired spline time window and resolution, and the degree of smoothing applied. Outputs include the splined record, its time derivative, and 1-sigma uncertainty estimates for both quantities.