title: Matlab function returning parent system of a subsystem?
body: <p>In a simulink subsystem, I would like to replace all <code>From</code>-blocks by corresponding <code>In-/Outports</code> and a <code>From</code>-block in the parent system. Is there a MATLAB function which returns the parent system of a subsystem, or a convenient way to achieve this without tweaking path strings?</p>