function activelabel(label, string)% ACTIVELABEL(LABEL, STRING) - Create a label on GCA which is%     active.  LABEL is the property of GCA whose label you are%     setting.  STRING is the initial text string for the label.% Copyright 2000, 2001, 2002, 2003, 2004, 2005 The MathWorks Inc  l = get(gca,label);    set(l,'string',string);  set(l,'buttondownfcn',@activelabelbuttondown);  function activelabelbuttondown(obj, action)% Callback when one of our active labels is clicked on.    set(obj,'edit','on');