Variable 'data' does not update in main script

I am working on acquiring mouse cursor data on matlab. Function 'mouseMove' is create for this purpose. function is working very well and current mouse cursor value is also retrieve. but I want to acquire that cursor value on main script which is update as the mouse move. But problem is that mouse cursor value in variable 'data' which is calling the function , is not updating the values as the cursor move

This my main code/script.

    %%For single image
img  = imread('pic.jpg');         %Read the image
imshow(img);                      % Show the image
temp = @mouseMove;                % Create Function Handle
set (gcf, 'WindowButtonMotionFcn', temp);    % Data map on plot figure
data = temp()                                   % Acquire the mouse  cursor data

this my function

function result = mouseMove (object, eventdata)
result = get (gca, 'CurrentPoint');
title(gca, ['(X,Y) = (', num2str(result(1,1)), ', ',num2str(result(1,2)), ')']);
end