code: def transform_annotation(self, ann, duration):
          '''Apply the vector transformation.
  
          Parameters
          ----------
          ann : jams.Annotation
              The input annotation
  
          duration : number > 0
              The duration of the track
  
          Returns
          -------
          data : dict
              data['vector'] : np.ndarray, shape=(dimension,)
  
          Raises
          ------
          DataError
              If the input dimension does not match
          '''
          _, values = ann.to_interval_values()
          vector = np.asarray(values[0], dtype=self.dtype)
          if len(vector) != self.dimension:
              raise DataError('vector dimension({:0}) '
                              '!= self.dimension({:1})'
                              .format(len(vector), self.dimension))
  
          return {'vector': vectorf transform_annotation(self, ann, duration):
          '''Apply the vector transformation.
  
          Parameters
          ----------
          ann : jams.Annotation
              The input annotation
  
          duration : number > 0
              The duration of the track
  
          Returns
          -------
          data : dict
              data['vector'] : np.ndarray, shape=(dimension,)
  
          Raises
          ------
          DataError
              If the input dimension does not match
          '''
          _, values = ann.to_interval_values()
          vector = np.asarray(values[0], dtype=self.dtype)
          if len(vector) != self.dimension:
              raise DataError('vector dimension({:0}) '
                              '!= self.dimension({:1})'
                              .format(len(vector), self.dimension))
  
          return {'vector': vector}
docs: Apply the vector transformation.
  
          Parameters
          ----------
          ann : jams.Annotation
              The input annotation
  
          duration : number > 0
              The duration of the track
  
          Returns
          -------
          data : dict
              data['vector'] : np.ndarray, shape=(dimension,)
  
          Raises
          ------
          DataError
              If the input dimension does not match