To resolve issues starting MATLAB on Mac OS X 10.10 (Yosemite) visit: http://www.mathworks.com/matlabcentral/answers/159016
Is there a way to call or access a simulink block in matlab without opening the graphical simulink environment or opening a predefined model (mdl) file?
Essentially, the goal is to write a matlab script which defines a simulink model within the script utilizing simulink blocks already present in the Simulink library (Rician noise generators, signal generators, and the like). This way, all adjustable parameters can be kept in "code" and not in graphical "forms" (cleaner development environment).
We are using Matlab R2012a. The necessary simulink toolkits as well as the simulink environment have already been licensed and installed.
Depending on the nature of the models you'd like to build, an alternative to using MATLAB to construct a Simulink model might be to use System objects. System objects are designed to be used either as Simulink blocks or in MATLAB code. When used in MATLAB code, there is no underlying Simulink model.
System objects come with System Toolboxes (DSP System Toolbox, Computer System Toolbox, etc). This page explains them way better than I could: System Objects for Stream Processing in MATLAB