What is it Matsim is a high level interface to create Simulink models from a Matlab script. Matsim is a wrapper around the standard simulink API that makes building a simulink model programmatically much faster. Key features - Automatic layout (no need to specify block positions!) - Intuitive interface (you can “add”, “subtract”, “multiply”, … simulink blocks) - Extensible library (easily add new blocks from your custom libraries)