Depending on how your code works, you could use one of these two methods. Both of them let you set an arbitrary variable in each button and return the one from the select button.
Method ONE: Create a uibuttongroup, set each button's UserData to any variable that you want, then in your code simply use the button group's SelectedObject property to return the selected button object, from which you can trivially get the UserData. Here is a working example:
N = 4;
bg = uibuttongroup('Position',[0,0,0.2,1]);
for k = 1:N
uicontrol(bg,'Style','radiobutton',...
'String',sprintf('Option %d',k-1),'UserData',k-1,...
'units','normalized', 'Position',[0,(k-1)/N,1,1/N]);
end
Run that code to create some buttons. Click whichever button you want. Now simply poll the selected button to get the UserData that you specified in the selected button:
>> get(get(bg,'SelectedObject'),'UserData')
ans =
2
Method TWO: Create a uibuttongroup, set each button's UserData to any variable that you want, and define the buttongroup's SelectionChangeFcn callback to get that variable. Here is a working example:
function temp0()
N = 4;
bg = uibuttongroup('Position',[0,0,0.2,1]);
for k = 1:N
uicontrol(bg,'Style','radiobutton',...
'String',sprintf('Option %d',k-1),'UserData',k-1,...
'units','normalized', 'Position',[0,(k-1)/N,1,1/N]);
end
set(bg,'SelectionChangeFcn',@bselection)
end
function bselection(~,e)
val = get(e.NewValue,'UserData')
end
This would be useful with nested functions, where the user would change the value of a variable in the parent workspace by triggering that callback.
