Getting derivatives of a kernel smoother function
Hi again, I am using the kernel smoother to estimate some values and sane the prediction formula in a new column. It works very well for my purpose . <JSL> obj = dt_clean << Bivariate( Y( :temperature ), X( :Z_res ) ,by (:date),invisible); obj << Kernel Smoother( 1, 1, .2, 0 ); obj << (curve[2] << Save Prediction Formula); Now I need the derivative of this function at each point of the X variable...