nl_tokens: end FUNCTION parse () FUNCTION : transform () Returns a data transformation function .
pl_tokens: function transform ( ) { var kde = new KDE ( ) ; /**
  		* FUNCTION: transform( data )
  		*	Defines the data transformation.
  		*
  		* @private
  		* @param {number} data - numeric stream data
  		* @returns {number} transformed data
  		*/ return function transform ( data ) { kde . estimator ( data , 'silverman' ) ; return kde . eval ( <mask> ) ; } ; }