Returns the row standard coordinates.

        The row standard coordinates are obtained by dividing each row principal coordinate by it's
        associated eigenvalue.

def row_standard_coordinates(self, X):
        """Returns the row standard coordinates.

        The row standard coordinates are obtained by dividing each row principal coordinate by it's
        associated eigenvalue.
        """
        utils.validation.check_is_fitted(self, 's_')
        return self.row_coordinates(X).div(self.eigenvalues_, axis='columns')