GitHub repository: tomasmckelvey/fsid
Primary language: Python
Description: FSID is an open source toolbox, implemented in the Python Julia and Matlab programming languages. FSID is a toolbox with scripts which estimates  linear multi-input multi-output state-space models from sample data using frequency-domain subspace algorithms. Algorithms which estimate models based on samples of the transfer function matrix as well as frequency domain input and output vectors are provided. The algorithms can be used for discrete-time models, continuous-time models as well as for approximation of rational matrices from samples corresponding to arbitrary points in the complex plane.