Hello, I am working on creating a state space PI speed controller for state space model of given system. For the given system, there are 4 outputs, namely, position_out,Speed_out,measured_position,measured_speed which is [4*1] matrix. Now I want to pass only "measured speed "as feedback to input of State space controller. How can I extract only one value i.e. measured Speed from [4*1] matrix in simulink model?