How can I save my data in my editboxes to my .mat file?

Hi

I need a code to save my numbers in my editboxes in gui to my .mat file

This is what I have:

function save_Callback(handles, ~, ~)
[filename, pathname] = uiputfile( ...
{'*.mat';'*.*'}, ...
'Save as');
save(filename, get(handles.edit1));

I've been looking at the other peoples questions to how they do it, and cant seem to see the solution that works for my,

I have named my editboxes: edit1, edit2, edit3, ..... and so on until edit42

what shall I write to get the saved into my .mat file, and do I need a drawnow;?

.

.

.

I've made a simplification:

function varargout = gui(varargin)

gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @gui_OpeningFcn, ...
                   'gui_OutputFcn',  @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{:});
end

function gui_OpeningFcn(hObject, eventdata, handles, varargin)

handles.output = hObject;

guidata(hObject, handles);

function varargout = gui_OutputFcn(hObject, eventdata, handles) 

function edit1_Callback(hObject, eventdata, handles)

function edit1_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end

function save_Callback(hObject, eventdata, handles)
[filename, pathname] = uiputfile( ...
{'*.mat';'*.*'}, ...
'Save as');
save(filename, get(handles.edit1,'String'));

function load_Callback(hObject, eventdata, handles)
[filename pathname] = uigetfile('*.mat','Select the MATLAB code file');
L = load( fullfile( pathname, filename ) );

But this doesn't work, I get the error:

Error using save
'23' is not a valid variable name.

I put 23 into the editbox and tried to save it.

Answer 1

[David Kusnirak]

Hi,

if you want to get the written value in the edit box you should use

save(filename, get(handles.edit1,'value'));

the field is updated immediately after you write the value into your GUI

[Mikkel]

When I try that, I get the error:

Attempt to reference field of non-structure array.

Error in boetten>save_Callback (line 2137)
save(filename, get(handles.edit1,'value'));

Error in gui_mainfcn (line 96)
        feval(varargin{:});

Error in boetten (line 43)
    gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)boetten('save_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

[David Kusnirak]

Did you use GUIDE to create your gui or did you design your gui by programming? Because it seems, that you do not have the handle of the editbox in the 'handles' variable

[Mikkel]

I used GUIDE to create my gui. I dont know if this is the problem, because my editbox: edit1 looks like this:

function edit1_Callback(hObject, ~, ~)
% hObject    handle to edit7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit7 as text
%        str2double(get(hObject,'String')) returns contents of edit7 as a double
val = str2double(get(hObject,'string'));
if isnan(val)
 errordlg('Not a number');
end

Do I need a handles in the callback to make it work?