Passing variable from one sub functions to another (GUI)

Hi, I need to use 2 numbers inputted in a textbox to make a plot in GUI. But it seems that variables are not visible for other function. How can I refer to varX1 and varY1.

function x1_Callback(hObject, eventdata, handles)

varX1=get(handles.x1,'string');
varX1=str2double(varX1);

function y1_Callback(hObject, eventdata, handles)

varY1=get(handles.y1,'string');
varY1=str2double(varY1);

function startDisplay_Callback(hObject, eventdata, handles)

plot(varX1,varY1);

[Stephen23]

@Iryna Kovalenko: this is not twitter, so I removed the # symbols from your tags.

"Passing variable from one sub functions to another"

This is a very common topic that has been discussed many times on this forum. You can easily you use the search (at the top of this page) to find the hundreds of threads that discuss this topic. The MATLAB documentation explains how to pass data between callbacks:

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

I would recommend that you use either nested functions or guidata. Do NOT use global variables, assignin, evalin, etc.

It is unusual to collect the string data in two separate callbacks: why not just trigger one callback that gets any data that it requires?

[Iryna Kovalenko]

Thank you for your reply. I searched it well and watched many videos, but I just couldn't understand that's why I asked a particular question here. Those structures I saw looked a little complicated, i'm just new to it

[Iryna Kovalenko]

@Stephen Cobeldick

Is this the right way to retrieve a variable from handle? I read the documentation and examples but still didn't manage to make it work. Pls, give me a hit whats wrong. Trying to use GUID

function x1_Callback(hObject, eventdata, handles)
handles.X1=str2double(get(handles.x1,'string'));
guidata(hObject,handles); 

function y1_Callback(hObject, eventdata, handles)
 handles.Y1=str2double(get(handles.y1,'string'));
guidata(hObject,handles); 

function x2_Callback(hObject, eventdata, handles)
handles.X2=str2double(get(handles.x2,'string'));
guidata(hObject,handles);

function y2_Callback(hObject, eventdata, handles)
handles.Y2=str2double(get(handles.y2,'string'));
guidata(hObject,handles);

function startDisplay_Callback(hObject, eventdata, handles)
handles.X1=xOne; 
handles.Y1=yOne;
handles.X2=xTwo;
handles.Y2=yTwo;
plot([xOne, xTwo],[yOne,yTwo]);

[Stephen23]

See my answer to your new question:

https://www.mathworks.com/matlabcentral/answers/404730-gui-handle-variable

[Iryna Kovalenko]

@Stephen Cobeldick Thank you, I saw it. I don't know if you still can see question after the answer is excepted, but I posted one more question there.