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_mci_random.m
    path of file: ./repos/bspm/thirdparty/spm12/toolbox/mci/inference
    
    the code of the file until where you have to start completion: function [S] = spm_mci_random (mcmc,R,v,M,U,Y)
% Random effects estimation
% FORMAT [S] = spm_mci_random (mcmc,R,v,M,U,Y)
%
% mcmc  Sampling parameters
% R     Priors on random effects (R.pE, R.pC)
% v     Fixed effects
% M     Model Structure (single subject)
% U     Inputs (single subject)
% Y     Data (single subject)
%
% S     Samples, [maxits x M.n] 
%
% Uses Langevin Monte Carlo
%__________________________________________________________________________

    
function [S] = spm_mci_random (mcmc,R,v,M,U,Y)
% Random effects estimation
% FORMAT [S] = spm_mci_random (mcmc,R,v,M,U,Y)
%
% mcmc  Sampling parameters
% R     Priors on random effects (R.pE, R.pC)
% v     Fixed effects
% M     Model Structure (single subject)
% U     Inputs (single subject)
% Y     Data (single subject)
%
% S     Samples, [maxits x M.n] 
%
% Uses Langevin Monte Carlo
%__________________________________________________________________________
% Copyright (C) 2015 Wellcome Trust Centre for Neuroimaging

% Will Penny
% $Id: spm_mci_random.m 6697 2016-01-27 14:57:28Z spm $

% Data precision

try, verbose=mcmc.verbose; catch, verbose=0; end