MATLAB: MATLAB: How to Assign Push Buttons to Values so that I can Track the Data?

get valuesguidepushbutton

Hello,
For clarity, I will explain my project:
I need to create a UI where participants can listen to two versions of a speech shaped noise (2 .wav files) and choose which one they think sounds the best. I then need to collect the data on the user responses.
My progress:
I used GUIDE to create an interface with two push buttons that is presented AFTER listening to the sounds. Here is the code for one of the .m files I'm using:
function varargout = simple_gui(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @simple_gui_OpeningFcn, ...
                   'gui_OutputFcn',  @simple_gui_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
function simple_gui_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
guidata(hObject, handles);
function varargout = simple_gui_OutputFcn(hObject, eventdata, handles) 
varargout{1} = handles.output;
 handles.output = hObject;
function pushbutton1_Callback(hObject, eventdata, handles)
function pushbutton3_Callback(hObject, eventdata, handles)
Where I need help:
I am having trouble assigning both push buttons as different values (like 1 and 2) and have the data represented in a clean way. If I could plot them on a bar graph, that would be an added plus.
Thanks!

Best Answer

If you are going to be programming a GUI, I strongly recommend that you acquaint yourself with the basics of MATLAB's object-oriented capabilities. OOP is not the end-all-be-all of programming as most CS people would have us believe, but is definitely the way to go when making a GUI. Here is a minimal example that does what you need; it stores the number of button presses as an object property which can be accessed from any other method in the class. You can run this as a standalone .m file without needing a wrapper script or anything. (Sorry that I tend to write lines a bit longer than desirable...)
classdef simple_gui < handle % Make sure to inherit from handle class
    properties
        f; % Holds figure
        width = 400; % Panel width
        height = 500; % Panel height
        mainPanel;   % Main GUI panel
        playSoundButton;
        response1Button;
        response2Button;
        nResponse1 = 0; % Track response 1
        nResponse2 = 0; % Track response 2
    end
    methods
        function obj = simple_gui
         % Create figure, hide during creation
            obj.f = figure('Visible', 'off', 'Position', [400, 500, obj.width, obj.height], ...
                'resize', 'off', 'NumberTitle', 'off');
            % Create Main Panel
            k = obj.width/obj.height;
            obj.mainPanel = uipanel('FontSize',12, 'units', 'normalized', 'fontweight', 'bold', ...
                'Position',[0.025*[1, k], ...
                [(1 - 2*0.025), (1 - 2*k*0.025)]]);
            % Create Buttons
            buttonWidth = 0.25; buttonHeight = 0.15;
            obj.playSoundButton = uicontrol('style', 'pushbutton', 'Parent', obj.mainPanel, ...
                'Units', 'normalized', 'Position', [0.1, 0.5, buttonWidth, buttonHeight], ...
                'String', 'Play Sound', 'Callback', @obj.playSound);
            obj.response2Button = uicontrol('style', 'pushbutton', 'Parent', obj.mainPanel, ...
                'Units', 'normalized', 'Position', [0.4, 0.5, buttonWidth, buttonHeight], ...
                'String', 'Response 1', 'Callback', @obj.response1);
            obj.response2Button = uicontrol('style', 'pushbutton', 'Parent', obj.mainPanel, ...
                'Units', 'normalized', 'Position', [0.7, 0.5, buttonWidth, buttonHeight], ...
                'String', 'Response 2', 'Callback', @obj.response2);
            % Assign a name to appear in the window title.
            set(obj.f, 'Name', 'Sound Survey Tool');
            % Move the window to the center of the screen.
            movegui(obj.f,'center')
            % Set GUI as visible
            set(obj.f, 'Visible', 'on');
        end
        %%%CALLBACK FUNCTIONS
        function playSound(obj, eventData, handles) %#ok eventData and handles are unused 
            fprintf('Sound played\n');
            % Code to play sound goes here
        end
        function response1(obj, ~, ~)
            obj.nResponse1 = obj.nResponse1 + 1;
            fprintf('Response 1 selected; response 1 count = %i\n', obj.nResponse1);
        end
        function response2(obj, ~, ~)
            obj.nResponse2 = obj.nResponse2 + 1;
            fprintf('Response 2 selected; response 2 count = %i\n', obj.nResponse2);
        end
    end
end
In my opinion, this is much more readable than the functional style GUIDE uses, and it is much, much easier to store data for access later. I've been writing GUI's with OOP for about a year now and forgotten most of what I knew about the function-based approach, so I'm afraid I can't help you if you want to go with that route.
Related Question