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: spm_mesh_label.m
    path of file: ./repos/malini/Codes/deconvolution - model/spm8
    
    the code of the file until where you have to start completion: function [C, N] = spm_mesh_label(M,opt)
% Label connected components of a surface mesh
% FORMAT C = spm_mesh_label(M)
% M        - a [nx3] faces array or a patch structure
% opt      - return connected components on faces/vertices:
%            {['faces'] ,'vertices'}

    
function [C, N] = spm_mesh_label(M,opt)
% Label connected components of a surface mesh
% FORMAT C = spm_mesh_label(M)
% M        - a [nx3] faces array or a patch structure
% opt      - return connected components on faces/vertices:
%            {['faces'] ,'vertices'}
%
% C        - a [nx1] vector containing labels for the connected components
%            in M
% N        - number of vertices per connected component
%__________________________________________________________________________
% Copyright (C) 2008 Wellcome Trust Centre for Neuroimaging

% Guillaume Flandin
% $Id: spm_mesh_label.m 4035 2010-08-05 18:54:32Z guillaume $


%-Parse input arguments
%--------------------------------------------------------------------------
if ishandle(M)
    M = struct('faces',get(M,'Faces'), 'vertices',get(M,'Vertices'));
elseif isnumeric(M)
    M = struct('faces',M);
end