You can get the indices of your selection by calling datacursormode and setting a custom update function. Example:
function cursortest
fig = figure;
imagesc
h = datacursormode(fig);
set(h,'UpdateFcn',@myupdatefcn)
datacursormode on
end
function txt = myupdatefcn(obj,event_obj)
% Get selection position
txt = get(event_obj,'Position')
end
That would give you the information you need to obtain and save the selected values from your plotted arrays.
