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: ipctb_spm_uc.m
    path of file: ./repos/bspm/thirdparty/MIALAB/gipc1d/ipctb_spm5_files
    
    the code of the file until where you have to start completion: function [u] = ipctb_spm_uc(a,df,STAT,R,n,S)
% corrected critical height threshold at a specified significance level
% FORMAT [u] = spm_uc(a,df,STAT,R,n,S)
% a     - critical probability - {alpha}
% df    - [df{interest} df{residuals}]
% STAT  - Statisical feild
%		'Z' - Gaussian feild
%		'T' - T - feild
%		'X' - Chi squared feild
%		'F' - F - feild
% R     - RESEL Count {defining search volume}
% n     - number of conjoint SPMs
% S     - Voxel count
%
% u     - critical height {corrected}

    
function [u] = ipctb_spm_uc(a,df,STAT,R,n,S)
% corrected critical height threshold at a specified significance level
% FORMAT [u] = spm_uc(a,df,STAT,R,n,S)
% a     - critical probability - {alpha}
% df    - [df{interest} df{residuals}]
% STAT  - Statisical feild
%		'Z' - Gaussian feild
%		'T' - T - feild
%		'X' - Chi squared feild
%		'F' - F - feild
% R     - RESEL Count {defining search volume}
% n     - number of conjoint SPMs
% S     - Voxel count
%
% u     - critical height {corrected}
%
%___________________________________________________________________________
%
% spm_uc corrected critical thresholds, using the minimum of different
% valid methods.
%
% See the individual methods for details
%
%     spm_uc_RF
%     spm_uc_Bonf
%
%___________________________________________________________________________
% Copyright (C) 2005 Wellcome Department of Imaging Neuroscience

% Thomas Nichols
% $Id: spm_uc.m 112 2005-05-04 18:20:52Z john $


% set global var NOBONF to 1 to turn off Bonferroni.
global NOBONF; if ~isempty(NOBONF) & NOBONF, S = []; end