How do I compute a moving average on a vector based signal using embedded MATLAB function in a way similar to the Digital FIR filter?

I would like to perform the following operations using Embedded MATLAB function blocks.

1. I have a vector based signal and I would like to calculate the moving average in a way similar to the digital filter block using embedded MATLAB function.

2. I have a vector based signal and I want to compute an average over every N samples and output it at every Nth sample time.

In either cases, how do I remember previous values (history) of signals from within the embedded MATLAB function?

Answer 1

[MathWorks Support Team]

The examples attached make use of embedded MATLAB to work around using delay blocks to calculate moving average on a vector based signal. Persistent variables are used in conjunction with embedded MATLAB to store values/histories of input signals.

1. I have a vector based signal and I would like to calculate the moving average in a way similar to the digital filter block using embedded MATLAB function - Refer to the attached example FINALEXAMPLE2.mdl. In this example, the output of the Embedded MATLAB function is shown to be the same as the digital FIR filter.

2. I have a vector based signal and I want to compute an average over every N samples and output it at every Nth sample time - Refer to the attached example FINALEXAMPLE1.mdl.