def describe_features(self, traj):
        """Return a list of dictionaries describing the LandmarkRMSD features.

        Parameters
        ----------
        traj : mdtraj.Trajectory
            The trajectory to describe

        Returns
        -------
        feature_descs : list of dict
            Dictionary describing each feature with the following information
            about the atoms participating in each feature
                - resnames: unique names of residues
                - atominds: the four atom indicies
                - resseqs: unique residue sequence ids (not necessarily
                  0-indexed)
                - resids: unique residue ids (0-indexed)
                - featurizer: Alpha Angle
                - featuregroup: the type of dihedral angle and whether sin or
                  cos has been applied.
        """
        feature_descs = []
        # fill in the atom indices using just the first frame
        self.partial_transform(traj[0])
        top = traj.topology

        aind_tuples = [self.atom_indices for _ in range(self.sliced_reference_traj.n_frames)]
        zippy = zippy_maker(aind_tuples, top)

        zippy = itertools.product(["LandMarkFeaturizer"], ["RMSD"], [self.sigma], zippy)

        feature_descs.extend(dict_maker(zippy))

        return feature_descs
Return a list of dictionaries describing the LandmarkRMSD features.

        Parameters
        ----------
        traj : mdtraj.Trajectory
            The trajectory to describe

        Returns
        -------
        feature_descs : list of dict
            Dictionary describing each feature with the following information
            about the atoms participating in each feature
                - resnames: unique names of residues
                - atominds: the four atom indicies
                - resseqs: unique residue sequence ids (not necessarily
                  0-indexed)
                - resids: unique residue ids (0-indexed)
                - featurizer: Alpha Angle
                - featuregroup: the type of dihedral angle and whether sin or
                  cos has been applied.