def transform(self, X):
        """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.
        """
        utils.validation.check_is_fitted(self, 's_')
        if self.check_input:
            utils.check_array(X)
        return self.row_coordinates(X)