In MATLAB, features are usually calculated within functions that take raw data as input and return a single value or vector.
: After writing several feature functions, you can use algorithms like Sequential Feature Selection to identify which ones are most predictive.
: The Diagnostic Feature Designer (available via the Predictive Maintenance Toolbox ) allows you to interactively extract features and then generate MATLAB code to automate the process for future data. 3. Writing Features to Files
: Start with the function keyword, define outputs, and ensure the filename matches the function name. Example :