https://au.mathworks.com/help/control/ref/incrementalpod.html
incrementalPOD - Incremental proper orthogonal decomposition (POD) - MATLAB
Use incrementalPOD to perform on-the-fly proper orthogonal decomposition (POD) of a state data and build a low-rank approximation of the controllability and...
incrementalproperorthogonaldecompositionpod