19.10.1998: Version 1.5 released.
These are the most important changes from v1.0 to v1.5:
19.10.1998: Updated the manual.
17.07.1998: LBG: Marked nodes which haven't moved since the last
update.
16.07.1998: GNG-U: Fixed a small bug regarding 'beta' for utility.
15.07.1998: Non-stationary probability distributions.
23.10.1997: Fixed: nodes without neighbors are not deleted in GNG-U
(but in GNG).
13.10.1997: Trifles in GNG-U.
29.09.1997: Fixed a small bug in Method LBG.
28.09.1997: New Method LBG-U (Fritzke 1997).
27.09.1997: New Method GNG-U (Fritzke 1997).
10.03.1997: Version 1.3 released.
09.03.1997: Proofred the manual.
08.03.1997: Changed the order of the models (model menu
and manual).
07.03.1997: GNG: added two variables (alpha, beta).
06.03.1997: Tuned the code (20% faster).
05.03.1997: Cleaned up the code/deleted DEBUG statements.
04.03.1997: Updated the manual.
03.03.1997: Added a new button 'Random Init'.
02.03.1997: Made some improvements concerning LBG.
28.02.1997: Version 1.2 released.
26.02.1997: Version 1.1 skipped for PR reasons :-).
24.02.1997: Added description of the model specific options to
the manual.
24.02.1997: Improved the variable learning rate for Hard
Competitive Learning.
21.02.1997: Changed eta to epsilon.
20.02.1997: First draft of the manual for v1.1.
18.02.1997: Updated the manual.
17.02.1997: Made some screen dumps for the manual.
30.10.1996: Some improvements and a bugfix concerning the error
values.
28.10.1996: New method Self-organizing map (SOM).
23.10.1996: Redesigned the user interface. I have made minor
changes only. The next major version 2.0 will have
a complete new interface.
22.10.1996: Added a close button to the error graph.
21.10.1996: In the method Growing Grid a percentage counter appears
in the fine-tuning phase. At 100% the calculation stops.
17.10.1996: Added a new button 'White'. It switches the background
of the drawing area to white. This is useful for making
hardcopies of the screen.
17.10.1996: New distribution UNIT.
16.10.1996: Fixed a bug: Now the Voronoi diagram/Delaunay
triangulation is also available for Growing Grid.
15.10.1996: New method Growing Grid.
14.10.1996: Added a new class GridNodeGNG to gain a grid covering
the nodes.
09.10.1996: Added a new menu for speed. Now it is possible to switch
to an individual speed depending on the machine and/or
browser. (On some machines there was no interaction
possible with the default value. On the other hand, why
longer waiting than necessary?)
04.10.1996: Added an error graph. (The source of this class was
written by Christian Kurzke and Ningsui Chen. I have
only made minor changes to this class. Many thanks to
Christian Kurzke and Ningsui Chen for this nice
graph class.)
30.09.1996: Added a new frame in a separate window for the error
graph (new class GraphGNG).
30.09.1996: New checkboxes to turn the nodes/edges on and off.
26.09.1996: Fixed again all known bugs.
25.09.1996: Finished the discrete distribution (mainly for LBG).
24.09.1996: Default no sound.
20.09.1996: Fixed all known bugs (Can you find some unknown?).
19.09.1996: Prepared for new distribution (a discrete one with 500
fixed signals).
10.09.1996: New method LBG (some minor bugs are known, but not
concerning the method).
03.09.1996: Renamed class PanelGNG to a more convenient name
(ComputeGNG).
02.09.1996: Split the source file DemoGNG.java. Now each class has
its own file.
01.09.1996: Inserted more comments.
30.08.1996: Cleaned up the code to compute the Voronoi
diagram/Delaunay triangulation.
07.08.1996: Added Delaunay triangulation (press checkbutton
Delaunay)!
06.08.1996: Now you can display Voronoi diagrams for each method
(press checkbutton Voronoi)!
21.06.1996: Version 1.0 released.