Problem displaying a counter on a GUİ

Hello everyone

İ am trying to display a counter on a GUİ.

Each time i click on a Next button , how is the counter going. The counter info is coming from excel.

İ have already used a static text in the gui and i renamed it exp_counter . İ would like just to display what is happening in the background.

function franck_guide_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 franck_guide (see VARARGIN)

% Choose default command line output for franck_guide
handles.output = hObject;
% Plot patch on uiaxes
%hold on

% Read experiment data from a CSV file

[~,~,data] = xlsread('excel_data_final.xlsx');
data(1,:) = []; % remove the header line

% randomly permute the rows of data without repeating the value:
data = data(randperm(size(data,1)),:);

numeric_data = cell2mat(data(:,[1 2 3 4 6]));

handles.v_thickness_1 = numeric_data(:,1); % numeric
handles.v_thickness_2 = numeric_data(:,2);
handles.h_thickness_1 = numeric_data(:,3);
handles.h_thickness_2 = numeric_data(:,4);
handles.amplitude = data(:,5); % cell array of char vectors
handles.v_or_h_array = numeric_data(:,5);
handles.f_df = data(:,7);


handles.exp_counter = 1;

handles.region1 = [];

% Create the Arduino serial object
handles.arduinoObj = serialport('COM3', 38400);
configureTerminator(handles.arduinoObj,'CR/LF');
%
for i=1:8
    handles.message = readline(handles.arduinoObj);
    disp(handles.message)
end

create_patch(handles);


function Next_button_Callback(hObject, eventdata, handles)
% hObject    handle to Next_button (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)uiconfirm(handles.UIFigure,'Are You sure?','Confirm Close',...
handles = guidata(hObject);

handles.exp_counter = handles.exp_counter + 1;

if handles.exp_counter > numel(handles.v_thickness_1)
%     set(handles.exp_counter);
   msgbox('Experiment is Done!','DONE'); 
    return
end
f = msgbox('Operation Completed','NEXT');
% delete the old patch and create a new one:
create_patch(handles);

Answer 1

[Voss]

If your static text is called handles.exp_counter, then that's going to be a problem because the name handles.exp_counter already refers to the counter variable (initialized to 1 in the OpeningFcn and incremented by 1 in Next_button_Callback).

Instead, call your static text something else, e.g., handles.text_exp_counter, and then set its String in the OpeningFcn and in Next_button_Callback (i.e., whenever the counter handles.exp_counter changes):

function franck_guide_OpeningFcn(hObject, eventdata, handles, varargin)
% ...
% ...
handles.exp_counter = 1;
set(handles.text_exp_counter,'String',num2str(handles.exp_counter));
% ...


function Next_button_Callback(hObject, eventdata, handles)
% hObject    handle to Next_button (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)uiconfirm(handles.UIFigure,'Are You sure?','Confirm Close',...
handles = guidata(hObject);

new_counter = handles.exp_counter + 1;

if new_counter > numel(handles.v_thickness_1)
    msgbox('Experiment is Done!','DONE'); 
    return
end

f = msgbox('Operation Completed','NEXT');

set(handles.text_exp_counter,'String',num2str(new_counter));

handles.exp_counter = new_counter;

% delete the old patch and create a new one:
create_patch(handles); % this calls guidata(), which stores the new handles.exp_counter value

(doing num2str is not strictly necessary)

[Franck paulin Ludovig pehn Mayo]

@_ Thank you . There is a lıttle issue that came up..,

The default line that is displayed at the very beginning seems not taking into consideration even though 1'' is displayed.

When i click on Next , it is still '1' even though the line has changed. After that everything woks fine

[Voss]

Hmm. Please verify that the code in Next_button_Callback is the same as I have it here, because I updated it after initially posting.

If the code is the same and handles.text_exp_counter String doesn't update correctly, you can try putting a drawnow() after setting the String:

set(handles.text_exp_counter,'String',num2str(new_counter));
drawnow();
handles.exp_counter = new_counter;

(but that would only eliminate any delay in updating the String due to create_patch having to run first, and it wouldn't explain why it's ok after the first Next click.)

Check for anywhere in the code handles.exp_counter might be reset to 0, and also verify that guidata(hObject,handles), i.e., guidata with two arguments, is still being called in create_patch (so that the new value of handles.exp_counter is stored).

[Franck paulin Ludovig pehn Mayo]

@_ the drawnow() has fixed it. Thank you very much

[Voss]

Excellent! You're welcome!

[Franck paulin Ludovig pehn Mayo]

@_ would you mind having a look on he following ? I am trying to implement a Pause button

https://in.mathworks.com/matlabcentral/answers/1721490-implementing-a-pause-button?s_tid=srchtitle