Predictions, Lasso Regression, Model Averaging, Spline Regression, Crossvalidation.
using PROC TRANSREG which is really easy. Here, a pb-spline with two knots was summoned. And a piece-wise regression with two knots was provided. Since degree=1 was specified, the curves are linear. Two knots — one at five and one at nine. The above can also be more freely modeled using PROC