 Similarly, the local regression and likelihood toolbox is a MEX front-end to the Locfit package which provides a comprehensive set of tools for model testing and validation.The GUI can be invoked from the MATLAB prompt by typing ndb – short for the Neuro Data Browser (NDB) – which provides a standard user interface for loading, visualizing and analyzing neurobiological time series data.The data can be in different formats such as EEG, MEG, FMRI etc.