How to store value of variables of Matlab Function Block of a Simulink Model into the Matlab Workspace dynamicall​y/continuo​usly?

More specifically : I am receiving signal data continuously in Simulink which I first pass into a Matlab function block .Here I want the signal matrix to get continuously stored in my matlab workspace. Basically after this I also want to continuously keep retrieving values from the workspace while the model runs. I've tried using set_param() but that is giving error invalid object handle. Code I used in the Matlab function block of the model

   function [y,z]= fcn(u)
      coder.extrinsic('get_param');
      coder.extrinsic('set_param');
      y = u;
      z = u;
      set_param('setTest/fcn','lo',u);
  end

Model Name : setTest

M-function name : fcn

Variable in M-function block to store : y

name with which to store variable in workspace : lo

value to store = u

where u = input Signal

I tried load_system('setTest') as well but to no avail What mistake am i making? If the approach is wrong what alternative do i have?

[Ryan Livingston]

If you could describe why the data needs to go to and from the MATLAB workspace, it would probably help us make suggestions. Knowing why it cannot be a signal would be helpful as well.

There are To/From Workspace Simulink blocks. However, I don't believe these are streaming as you requested:

http://www.mathworks.com/help/simulink/slref/fromworkspace.html http://www.mathworks.com/help/simulink/slref/toworkspace.html