You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: clusterhybrid.m
    path of file: ./repos/mdtoolbox/mdtoolbox
    
    the code of the file until where you have to start completion: function [indexOfCluster, center, distanceFromCenter] = clusterhybrid(trj, f_max, max_iteration)
%% clusteringbykmeans
% Hybrid clustering with K-centers and K-medoids using RMSD metric
%
%% Syntax
%# [indexOfCluster, center, sumd] = clusterhybrid(trj, f_max)
%
%% Description
%
% * trj            - trajectory to be clustered [double nframe x natom3]
% * f_max          - maximum distance of samples from cluster centers [integer scalar]
% * max_iteration  - maximum iteration of K-medoids clustering
%
% * indexOfCluster     - cluster index from 1 to kcluster [integer nframe]
% * center             - centers of clusters [double kcluster x natom3]
% * distanceFromCenter - centers of clusters [double kcluster x natom3]
% 
%% Example
%#
% 
%% See also
% clusterkcenters
%
%% References
% This function uses the method described in

    
function [indexOfCluster, center, distanceFromCenter] = clusterhybrid(trj, f_max, max_iteration)
%% clusteringbykmeans
% Hybrid clustering with K-centers and K-medoids using RMSD metric
%
%% Syntax
%# [indexOfCluster, center, sumd] = clusterhybrid(trj, f_max)
%
%% Description
%
% * trj            - trajectory to be clustered [double nframe x natom3]
% * f_max          - maximum distance of samples from cluster centers [integer scalar]
% * max_iteration  - maximum iteration of K-medoids clustering
%
% * indexOfCluster     - cluster index from 1 to kcluster [integer nframe]
% * center             - centers of clusters [double kcluster x natom3]
% * distanceFromCenter - centers of clusters [double kcluster x natom3]
% 
%% Example
%#
% 
%% See also
% clusterkcenters
%
%% References
% This function uses the method described in
% [1] K. A. Beauchamp, G. R. Bowman, T. J. Lane, L. Maibaum, I. S. Haque, and V. S. Pande, J. Chem. Theory Comput. 7, 3412 (2011).
%

%% preparation
if iscell(trj)
  trj_cell = trj;
  
  ncell = numel(trj_cell);
  natom3 = size(trj_cell{1}, 2);
  natom = natom3/3;

  nframes  = zeros(ncell+1, 1);
  for i = 1:ncell
    nframes(i+1) = nframes(i) + size(trj_cell{i}, 1);
  end