Plotting opened data in GUI

I am working on a GUI in Matlab. I am able to load the data pushing one button1, but I need to plot the data pushing the second button2, but an error still appers. Could you please give me a hint? This is the code below:

% --- Executes on button press in pushbutton1. function pushbutton1_Callback(hObject, eventdata, handles) % hObject handle to pushbutton1 (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('MultiSelect','on');

fullpathname = strcat(pathname, filename);

file = fullfile(pathname, filename);

text = fileread(fullpathname);

set(handles.text3,'String', fullpathname)

set(handles.text7,'String',text(:,:)) S = load(file);

% --- Executes on button press in pushbutton2. function pushbutton2_Callback(hObject, eventdata, handles) % hObject handle to pushbutton2 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

S = xlsread(file);

newfilename = (S(1:end-4)); x = newfilename(:,1); y = newfilename(:,2); z = newfilename(:,2); subplot(3,1,1) plot(Vx); hold on subplot(3,1,2) plot(Vy); hold on subplot(3,1,3) plot(Vz);

I am getting this error: S = load(file); %%%%% %%%%%

Error in gui_mainfcn (line 95) feval(varargin{:});

Error in VKG_Zobrazovac (line 42) gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)VKG_Zobrazovac('pushbutton1_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback

Undefined function or variable 'file'.

Error in VKG_Zobrazovac>pushbutton2_Callback (line 111) S = xlsread(file); %%%%% %%%%%

Error in gui_mainfcn (line 95) feval(varargin{:});

Error in VKG_Zobrazovac (line 42) gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)VKG_Zobrazovac('pushbutton2_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback

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Answer 1

[Adam]

You need to take a read of this:

https://uk.mathworks.com/help/matlab/creating_guis/share-data-among-callbacks.html

A GUI doesn't have a single workspace, each function has its own workspace, but there are various methods for sharing data between those.

handles.someData = someData;
guidata( hObject, handles )

is my favoured method, but you should familiarise yourself with the options and choose the one you prefer.

[Franta Cymorek]

Helped a little bit, thank you!