This model uses spline interpolation to fill in estimated values in a time series where data is missing. The time series in this model contains missing data where a value of -999 is used in the place of this missing data. In this example, an external DLL is used to do the calculations, which use the The GNU Scientific Library (GSL).
This model requires that you also save the DLL in the same directory as the model file before running it. Please make sure you download both files from the links below.