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_vw_init.m
    path of file: ./repos/spm12/toolbox/mci/inference
    
    the code of the file until where you have to start completion: function [w_init,v_init,assign,update_ffx,update_rfx] = spm_mci_vw_init (MCI)
% Initialise fixed and random effects
% FORMAT [w_init,v_init,assign,update_ffx,update_rfx] = spm_mci_vw_init (MCI)
%
% MCI       MCI data structure
%
% w_init        initial rfx values
% v_init        initial ffx values
% assign        data structure describing how rfx/ffx are assigned 
%               to initial conditions, flow and output params
% update_ffx    (1/0)
% update_rfx    (1/0)
%__________________________________________________________________________
% Copyright (C) 2015 Wellcome Trust Centre for Neuroimaging

    
function [w_init,v_init,assign,update_ffx,update_rfx] = spm_mci_vw_init (MCI)
% Initialise fixed and random effects
% FORMAT [w_init,v_init,assign,update_ffx,update_rfx] = spm_mci_vw_init (MCI)
%
% MCI       MCI data structure
%
% w_init        initial rfx values
% v_init        initial ffx values
% assign        data structure describing how rfx/ffx are assigned 
%               to initial conditions, flow and output params
% update_ffx    (1/0)
% update_rfx    (1/0)
%__________________________________________________________________________
% Copyright (C) 2015 Wellcome Trust Centre for Neuroimaging

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

assign=MCI.assign;
try, fixed=MCI.fixed; catch, fixed=[]; end