File:SOM versus GSOM.png
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Summary
| Description |
English: Approximation of a spiral with noise by SOM (the upper row) and GSOM (the lower row) with 50 (the first column) and 100 (the second column) nodes. The Fraction of variance unexplained is: a) 4.68% (SOM, 50 nodes); b) 1.69% (SOM, 100 nodes); c) 4.20% (GSOM, 50 nodes); d) 2.32% (GSOM, 100 nodes. The initial approximation for SOM was equidistribution of nodes in a segment on the first principal component with the same variance as for the data set. The initial approximation for GSOM was the mean point. Illustration is prepared using free software: E.M. Mirkes, Principal Component Analysis and Self-Organizing Maps: applet. University of Leicester, 2011. This applet is published under cc Attribution 3.0 unported license. |
| Date | |
| Source | Own work |
| Author | Agor153 |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:40, 10 May 2012 | | 1,248 × 859 (145 KB) | Agor153 |
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