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: CBIG_KRDNN_test_krr.m
    path of file: ./repos/CBIG/stable_projects/predict_phenotypes/He2019_KRDNN/KR_UKBB
    
    the code of the file until where you have to start completion: function CBIG_KRDNN_test_krr(setup_file, lambda_set)
% CBIG_KRDNN_test_krr(setup_file, lambda_set)
% 
% This function runs kernel ridge regression algorithm on training and
% testing data.
%
% Inputs:
%   - setup_file
%     Path of the setup file (.txt file).
%     setup_file has the following fields:
%     1. Line 1
%        `data`, the location of your output and intermediate values. You can
%        also change this to any p
    
function subj_list = read_sub_list(subject_text_list)
% this function will output a 1xN cell where N is the number of
% subjects in the text_list, each subject will be represented by one
% line in the text file
% NOTE: multiple runs of the same subject will still stay on the same
% line
% Each cell will contain the location of the subject, for e.g.
% '<full_path>/subject1_run1_bold.nii.gz <full_path>/subject1_run2_bold.nii.gz'
    fid = fopen(subject_text_list, 'r');
    i = 0;
    while(1);
        tmp = fgetl(fid);
        if(tmp == -1)
            break
        else
            i = i + 1;
            subj_list{i} = tmp;
        end