question: @ Override public String [ ] apply ( String [ ] words ) { if ( ! isApplicable ( ) ) return words ; for ( int i = 0 ; i < _colList . length ; i ++ ) { int colID = _colList [ i ] ; try { double val = UtilFunctions . parseToDouble ( words [ colID - 1 ] ) ; int binid = 1 ; double tmp = _min [ i ] + _binWidths [ i ] ; while ( val > tmp && binid < _numBins [ i ] ) { tmp += _binWidths [ i ] ; binid ++ ; } words [ colID - 1 ] = Integer . toString ( binid ) ; } catch ( NumberFormatException e ) { throw new RuntimeException ( "Encountered \"" + words [ colID - 1 ] + "\" in column ID \"" + colID + "\", when expecting a numeric value. Consider adding \"" + words [ colID - 1 ] + "\" to na.strings, along with an appropriate imputation method." ) ; } } return words ; }
target:  Method to apply transformations.