This paper describes the new developments in Mathwork's System Identification Toolbox to be run with Matlab. There are three main additions to the new version: (1) Frequency domain input/output data as well as frequency response data can be directly used to fit models. (2) Simple continuous-time process models of the type Static Gain, Time Constant, Dead Time can be directly estimated as a new model object class. (3) A function advice can be applied both to data sets and to estimated models, in order to provide guidance and advice through the sometime complex identification process.
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