# My Mental Model of a Model2

Posted by Seth Popinchalk,

When you are new to something, it always helps to get a
mental picture of how that something works.  Since I learned Simulink over 10
years ago, I have developed my own mental model of Simulink models.  Today I
want to present a mental model for the three basic components in Simulink block
diagrams, ports, blocks and signals.

Something Familiar

A good mental model is something to which you are already
familiar.  I like to compare Simulink diagrams to programs written in a
procedural language like MATLAB or C.  My favorite is MATLAB, so that is
usually how I think.

Ports

Ports are the input and output arguments for the function.

Blocks

When I think about blocks, I think of them as algorithmic
components of the programs.  A block like the Gain or Product is a function
that operates on inputs and produces an output.

Signals

Signal lines pass the value output from one block to the
next block.  I think of signal lines as the variables in a program.

Generating Code

With my intuition in hand, I read the generated code so I
can compare and refine my mental model.  The result is here:

In this case, I made a couple tweaks to the code generation

What do you think?

How does your mental model of a block diagram compare to
here
and share it with me.

this piece of snippet is short and crisp,need to post more mental model strutures in depth possible with optimization issuses.