As per my understanding you are trying to calculate the concentration in a ROI while moving it but getting errors on adding listeners.
Here is an example how you can try to do it:
%set up listeners for ROI moving events
addListener(roi,'Moving ROI',@allevents);
% allevents callback function displays the previous position & the current position of the ROI
function allevents(~,evt)
evname= evt.EventName;
switch(evname)
case{'MovingROI'}
disp(['ROI moving previous position:' mat2str(evt.PreviousPosition)]);
disp(['ROI moving current position :' mat2str(evt.CurrentPosition)]);
end
end
You can add case inside switch block as per your need, but this is the basic procedure of adding listeners. If you are still getting errors, then please attach its screenshot also.
Hope it helps!
