saving and loading data from and into gui from/to .mat file

Hello sir, I'm working on GUIDE to save some data from the GUI to workspace. I have edit boxes and popup menus with some default values... its working fine when i alter the data in the edit boxes(Checking in the box) and for popup menus after selecting the value in the list.... now the probelm is, its not saving the default value as it is displaying in the edit boxes or popup menus... please help me out to sort this probelm

with the same example, how to get the data in the already saved .mat file and load that data in to the edit boxes or popup menu... i tried with several commands.. but nothing is working out.... my code looks like this

function varargout = example(varargin)
% EXAMPLE M-file for example.fig
%      EXAMPLE, by itself, creates a new EXAMPLE or raises the existing
%      singleton*.
%
%      H = EXAMPLE returns the handle to a new EXAMPLE or the handle to
%      the existing singleton*.
%
%      EXAMPLE('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in EXAMPLE.M with the given input arguments.
%
%      EXAMPLE('Property','Value',...) creates a new EXAMPLE or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before example_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to example_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help example

% Last Modified by GUIDE v2.5 11-Feb-2015 15:18:15

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @example_OpeningFcn, ...
                   'gui_OutputFcn',  @example_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{:});
end
% End initialization code - DO NOT EDIT

% --- Executes just before example is made visible.
function example_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to example (see VARARGIN)

% Choose default command line output for example
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes example wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.
function varargout = example_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;

% --- Executes on button press in Save_pb.
function Save_pb_Callback(hObject, eventdata, handles)
Message=handles.text;
Status=handles.popup;

uisave({'Message','Status'},'New file');
uiwait(msgbox('data saved'));
% hObject    handle to Save_pb (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

function text_Callback(hObject, eventdata, handles)
% hObject    handle to text (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
handles.text=get(hObject,'String');
guidata(hObject, handles)
% Hints: get(hObject,'String') returns contents of text as text
%        str2double(get(hObject,'String')) returns contents of text as a double

% --- Executes during object creation, after setting all properties.
function text_CreateFcn(hObject, eventdata, handles)
% hObject    handle to text (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end

% --- Executes on selection change in popup.
function popup_Callback(hObject, eventdata, handles)
% hObject    handle to popup (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
contents=cellstr(get(hObject,'String'));
handles.popup=contents{get(hObject,'Value')};
guidata(hObject, handles)
% Hints: contents = cellstr(get(hObject,'String')) returns popup contents as cell array
%        contents{get(hObject,'Value')} returns selected item from popup

% --- Executes during object creation, after setting all properties.
function popup_CreateFcn(hObject, eventdata, handles)
% hObject    handle to popup (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end

% --- Executes on button press in load_pb.
function load_pb_Callback(hObject, eventdata, handles)
% hObject    handle to load_pb (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

[filename pathname] = uigetfile('*.mat','Select the MATLAB code file');
L = load( fullfile( pathname, filename ) );
varnames = fieldnames(L);
fieldvals =fieldvalue(varnames);  %GUESS: you only have 1 variable in .mat
%GUESS: the one variable is a vector of numeric values
%GUESS: you have a vector of edit box handles
%GUESS: and each box is to get the textural representation of one value
  set( handles.popup, 'String',  fieldvals(1));

[Adam]

Please format your code in a {} Code block to make it easier for us to read.

If you want to keep hold of variables you load from a mat file you need to attach them to the handles structure in a callback

e.g.

handles.varnames = fieldnames(L);
handles.fieldvals = fieldvalue( handles.varnames )

guidata( hObject, handles )

If you really want things to be loaded to the workspace then you can use

assignin

although I have never done so myself since this is of no use in most GUI-based applications where the user of the GUI is exclusively using the GUI rather than also having access to the command line to further manipulate data.

[madhu T S]

thank you adam... I sorted out the other problems... but stuck up in saving the data from POPUP menu... if I select any one data outof the list in the popup menu its saving... but if i run the GUI and try to save without checking in, the default(First row) of the popup menu should save... can u suggest code for this problem???

[Adam]

You should be able to just save your hPopup.Value to file at any time. The default will be 1 if nothing has been user-selected.