code: def transform(self, X):
          
          utils.validation.check_is_fitted(self, 's_')
          if self.check_input:
              utils.check_array(X)
          return self.row_coordinates(X)
docs: Computes the row principal coordinates of a dataset.
  
          Same as calling `row_coordinates`. In most cases you should be using the same
          dataset as you did when calling the `fit` method. You might however also want to included
          supplementary data.