question: public final double [ ] smooth ( final double [ ] xval , final double [ ] yval ) throws MathIllegalArgumentException { if ( xval . length != yval . length ) { throw new MathIllegalArgumentException ( LocalizedCoreFormats . DIMENSIONS_MISMATCH , xval . length , yval . length ) ; } final double [ ] unitWeights = new double [ xval . length ] ; Arrays . fill ( unitWeights , 1.0 ) ; return smooth ( xval , yval , unitWeights ) ; }
target:  Compute a loess fit on the data at the original abscissae.