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: db_choose.m
    path of file: ./repos/HRTF-Individualization/model/matlabcode/functions/database
    
    the code of the file until where you have to start completion: function db_choose(hObject, eventdata, handles)
% Import DBs and apply Data to GUI
clearvars -global DB ANGLES subjects UNIVERSAL_DTF pcs weights v mn

global subjects
global DB
global current_db
global fs
global ANGLES
global hrir_db_length
global UNIVERSAL_DTF
global subjects_mean_left
global subjects_mean_right

%set(handles.status_text,'String', '');
set(handles.azimuth,'Value', 1);
set(handles.elevation,'Value', 1);
set(handles.subject,'Value', 1);
        
database = database_import(current_db,1,1);

DB = database.hrirs;
hrir_db_length = size(DB,4);
fs = database.fs;
subjects = database.subjects;

    
function db_choose(hObject, eventdata, handles)
% Import DBs and apply Data to GUI
clearvars -global DB ANGLES subjects UNIVERSAL_DTF pcs weights v mn

global subjects
global DB
global current_db
global fs
global ANGLES
global hrir_db_length
global UNIVERSAL_DTF
global subjects_mean_left
global subjects_mean_right

%set(handles.status_text,'String', '');
set(handles.azimuth,'Value', 1);
set(handles.elevation,'Value', 1);
set(handles.subject,'Value', 1);
        
database = database_import(current_db,1,1);

DB = database.hrirs;
hrir_db_length = size(DB,4);
fs = database.fs;
subjects = database.subjects;
db_anthro = database.data_anthro;
ANGLES = database.angles;
db_department = database.department;

%[DB,subjects,~,ANGLES,UNIVERSAL_DTF,hrir_db_length,~,~,db_department,db_anthro,fs] = db_import(current_db,1,hObject, eventdata, handles,1);

set(handles.db_text,'String',db_department);
set(handles.subject,'String',[subjects]);
set(handles.elevation,'String', unique(ANGLES(:,2)));
set(handles.azimuth,'String', unique(ANGLES(:,1)));

text_play_subjects = sprintf('Play %i Subjects',length(subjects));
set(handles.play_all_subjects,'String', text_play_subjects);

% Up-Down - search maximum/ minimum elevation
ud_max = max(unique(ANGLES(:,2)));
ud_min = min(unique(ANGLES(:,2)));

if (ud_max >= 30) & (ud_min <= 30)
set(handles.play_updown,'ForegroundColor',[0 0 0]);
else
set(handles.play_updown,'ForegroundColor',[0.7 0.7 0.7]);      
end