Incrementing GUIDE variable

Goodmorning community,

Quick question:

I have 2 variables that I declare in a createfunction in my GUIDE GUI:

handles = guidata(gcf); 
if ~isfield(handles, 'MyMatrix');
handles.MyMatrix = zeros(2, 10);
guidata(gcf, handles); 
end

handles = guidata(gcf); 
if ~isfield(handles, 'increment');
handles.increment = 1;
guidata(gcf, handles); 
end

So the idea is to use .increment to index .MyMatrix

%Pushbutton callback%
MyValue = str2double(get(handles.edit2,'String')); %get value 
  handles.MyMatrix(handles.increment)= MyValue;
  handles.inc + 1; %This is what is not working
  handles = guidata(gcf);

I have tried handles.inc = handles.inc + 1; as well.

Right now my output after 2 clicks of the push button are:

ans =

   29.5744 0 0 0 0 0 0 0 0 0
         0 0 0 0 0 0 0 0 0 0

 27.5465 0 0 0 0 0 0 0 0 0
         0 0 0 0 0 0 0 0 0 0

Instead of

 29.5744 27.5465 0 0 0 0 0 0 0 0
         0 0 0 0 0 0 0 0 0 0

Thanks in advance!!!

[Sean de Wolski]

What didn't work about:

"I have tried handles.inc = handles.inc + 1; as well."

That appears to be correct to me. Did it throw an error?

You could also look at using persistent variables

[B_Richardson]

Yes that did work. Actually what the problem was

handles = guidata(gcf);

should have been

guidata(gcf, handles)

thanks!

Answer 1

[Walter Roberson]

In your callback, instead of doing handles = guidata(gcf); after the increment of handles.inc, do guidata(gcf, handles) as you want to write out the new value.

[B_Richardson]

that did it!