A full-sized version of any figure can be displayed by clicking on the "thumbnail" copy. The size column indicates the approximate size of the file containing the full version.

Figure	Content	Size	Thumbnail	Comment
1.	A typical completed self-organized map.	(36k)		A 60x60 map used to analyze 3-d data
2a.	The arrangement of nodes in a triangular map.	(5k)		.
2b.	The arrangement of nodes in a square map.	(4k)		.
2c	The arrangement of nodes in a hexagonal map.	(8k)		.
3	Node weights in a square map.	(2k)		.
4.	Stages in the evolution of a typical self-organized map. Cycle 0.	(50k)		Notice the complete absence of structure - all nodes are starting with random weights.
5.	Cycle 11.	(34k)		The highlighted regions show where the first few "winning nodes" have been found. (There are more than eleven highlighted regions, since in each cycle more than a single data point is fed onto the map.)
6.	Cycle 202.	(41k)		Winning nodes have been found across the map, so all node weights have been affected, but there is little sign yet of order developing.
7.	Cycle 4403.	(41k)		Faint signs of order are starting to appear; in particular, two dark regions near the centre of the map are becoming evident.
8.	Cycle 5976.	(37k)		.
9.	Cycle 8137.	(33k)		Development of the different regions is now becoming pronounced.
10.	Cycle 9440.	(35k)		.
11.	Cycle 11110.	(36k)		.
12.	Cycle 13050.	(35k)		.
13.	Cycle 20842.	(35k)		The map is now essentially completely converged.
14.	A self-organizing map tackling the square grid problem. Cycle 3.	(10k)		Node weights set at random initially. Since the nodes are plotted at a position determined by their weights, no order is yet detectable.
15.	Cycle 109.	(6k)		Some order is already apparent after a hundred cycles, but the network is disorganized and the nodes very unevenly spaced.
16.	Cycle 191.	(6k)		Order is growing - the nodes are much more evenly spaced than in the previous figure, although the structure is still irregular.
17.	Cycle 420.	(6k)		The final form of the map is becoming clear.
18.	Cycle 1400	(5k)		The map is now close to convergence.

Last updated March 23, 2001.