Type fdtool to start.

      In the main window of the GUI, extensive helps are available, covering general use, load/save data, etc.

• Help mechanisms:
• tooltipstrings in every subwindow: when the mouse is moved above a control object, small "balloon helps" pop up with a short information text. Note: the main window contains so-called patches which do not have tooltipstrings.
• There is a Help menu in every window. Under this, there is a special submenu, 'Help on Object': the selected object will be explained in a separate window
• How to run demonstrations: In the main window select Help / Introductory Demos (or Complex Examples and Demos), then select the desired one from the window. Recommended demos:
• Introductory Demos / To GUI /
• Helps: Some introduction to the help facilities
• Creating data objects: Examples to generate and import data objects
• Processing time domain data: A simple series of steps
• Complex Examples and Demos
• Bandpass filter %Quick processing of freq. domain data
• Electrical machine %Processing data from a wide frequency band
• Wilkinson-type system %Processing a badly conditioned system, using orthogonal polynomials
• Record and replay your GUI actions: select the menu Recorder / Open, push Record on the recorder, now use the GUI, then press stop. Save the sequence of actions if you want. Replay: rewind recorder to Action 1, then press PLAY.

• Load sample objects to workspace:
• load robotarm %load sample data
• load rarmmods %load sample models
• Utilities: plot(m), plot(f), plot(robotarm_6models), bode(m), nyquist(m), diff(robotarm_6models{1},m)
• Preprocess data, e.g. remove the effect of a known parametric model: f/m
• Illustrate uncertainty of identified model: cloud(m), zoom on, and then zoom-in around the right valley of the transfer function to see the different transfer functions
• Combine models (series connection of systems): m*m
• Convert models to/from the Control System Toolbox objects: ss(m), tf(m), zpk(m) fidmodel(tf(m))
• Information on objects (tiddata, fiddata, fidmodel), e.g.:
• help fiddata   %help on creator
• help(fiddata)  %description of object
• helpc(fiddata) %contents of class directory
• Information on new call: help elis, help simfou, help eliscost, etc.
• Help on earlier (more complicated) syntax: oldhelp simfou, oldhelp elis, etc.
• List possible call forms: usage simfou (the command usage also works for other MATLAB functions in general)

• Test to make sure that no name clash happens with function M-files on the MATLAB path: run fdunique
• General test of the whole GUI: simply call fdguitst, and let it run untouched for about an hour