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- README file for the example files som_cube.xxx
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-
-
- Description: Self-organizing map cube example
- ============
-
- The files som_cube.xxx describe network and pattern files used to
- demonstrate the use of the self-organizing map (SOM, Kohonen map) in
- SNNS. The eight training patterns are the verteces of a
- three-dimensional cube of size 2x2x2 centered at the origin, with
- vertex coordinates from (-1, -1, -1) to (1, 1, 1).
- The self-organizing map is a two-dimensional 16x16 grid of neurons.
- The three-dimensional input vectors are mapped to different positions
- of the two-dimensional map.
-
- See the user manual for a more detailed description of the SOM
- implementation in SNNS and its usage.
-
-
- Network-Files: som_cube.net
- ==============
-
- This network file contains a trained SOM network for the cube verteces
- task described above. The self-organizing map is a two-dimensional
- 16x16 grid of neurons. The standard configuration file for this
- network is som_cube.cfg (one 2D display only).
-
-
- Pattern-Files: som_cube.pat
- ==============
-
- The eight training patterns (only input patterns, no output pattern)
- are the verteces of a three-dimensional cube of size 2x2x2 centered at
- the origin, with vertex coordinates from (-1, -1, -1) to (1, 1, 1).
-
-
- Miscellaneous: som_cube.cont
- ==============
-
- The file som_cube.cont is a control file for the tool convert2snns
- (in the SNNS tools subdirectory) to create a SOM with 3 components
- and grid 16x16.
-
-
- Hints:
- ======
-
- Note to open the control panel before opening the special Kohonen
- panel. This special panel allows you to view vector component maps of
- any input dimension of the map.
-
- Note one point of frequent confusion: The button WINNER in the Kohonen
- panel tests *all* patterns of the currently active pattern file and for
- each winner neuron it displays the pattern number of the input pattern
- for which the neuron was winner, on top of the neuron. To see these
- numbers you must have specified "units top : ON SHOW winner" in the
- SETUP panel of the 2D network display window. (These numbers are
- better recognized if the neuron grid is made smaller and the values
- displayed at the bottem of the neurons are switched off).
-
- If a neuron is actived twice as winner for different input patterns,
- the later input pattern number overwrites the earlier number.
- Therefore, it may happen that not all pattern numbers appear on top of
- the neurons.
-
- The confusion stems from the fact that upon pressing the WINNER button
- in the Kohonnen panel, *all* patterns are tested and the activation of
- the last input pattern is displayed in the 2D display. This is always
- the same input pattern and the same Kohonen neuron, regardless of what
- pattern has been specified in the remote panel before.
-
-
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- End of README file
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-