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| [[Image:SOM_legend.jpg|thumb|172px|Legend]] | | [[Image:SOM_legend.jpg|thumb|172px|Legend]] |
− | Self Organising Maps (SOMs) can be used as 2d spatial summariser visualisations of multidimensional data. In the maps shown here, text distance metrics are generated from the weekly/monthly content on some of the more active mailing lists. Using a geographic like landscape metaphor, the height (colour gradient) indicates features with strong associations to all other features; proximity represents association between specific features (e.g. related terms), and label size indicates guide to basic frequency of a feature. There are many "correct" 2d map layouts for the same set of data (due to the multidimensional nature of the data), each map generation will usually settle into a slightly different set of local minima, but the associations are no less valid for each. After removing linguistic junk words, and word stemming, the maps currently pick the weeks/months top ~200 features by frequency. Each is a continuous, tillable surface and wraps around north/south and east/west (surface of a torus); so if you find an interesting label to one side, remember to check it's neighbours on the opposite side. | + | Self Organising Maps (SOMs) can be used as 2d spatial summariser visualisations of multidimensional data. In the maps shown here, text distance metrics are generated from the weekly/monthly content on some of the more active mailing lists. Using a geographic like landscape metaphor, the height (colour gradient) indicates features with strong associations to all other features; proximity represents association between specific features (e.g. related terms), and label size indicates guide to basic frequency of a feature. There are many "correct" 2d map layouts for the same set of data (due to the multidimensional nature of the data), each map generation will usually settle into a slightly different set of local minima, but the associations are no less valid for each. After removing linguistic junk words, and word stemming, the maps currently pick the weeks/months top ~200 features by frequency. Each map is a continuous, tillable surface, and wraps around north/south and east/west (surface of a torus); so if you find an interesting label to one edge, remember to check it's neighbours on the opposite side. |
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| == What Do They Show? == | | == What Do They Show? == |
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| == It's An Education Project Mailing List == | | == It's An Education Project Mailing List == |
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− | Weekly maps generated with posts from the [http://lists.sugarlabs.org/listinfo/iaep IAEP mailing list]. Most recent maps shown first - for older maps please see the [[Sugar_Labs/SOM/IAEP|IAEP map history map archive]] page.
| + | Monthly maps generated with posts from the [http://lists.sugarlabs.org/listinfo/iaep IAEP mailing list]. Most recent maps shown first - for older maps please see the [[Sugar_Labs/SOM/IAEP|IAEP map history map archive]] page. |
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| <gallery widths="275" heights="150" perrow="2"> | | <gallery widths="275" heights="150" perrow="2"> |
− | File:2011-Sept-17-23-som.jpg|'''2011 Sept 17th-23rd''' (30 emails) | + | File:2012-July-som.png|'''2012 July''' (31 emails) |
− | File:2011-Sept-10-16-som.jpg|'''2011 Sept 10th-16th''' (49 emails)
| + | File:2012-June-som.png|'''2012 June''' (81 emails) |
− | File:2011-Sep-3-9-som.jpg|'''2011 Sep 3rd-9th''' (21 emails)
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− | File:2011-Aug-27-Sept-2-som.jpg|'''2011 Aug 27th-Sept 2nd''' (40 emails)
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− | File:2011-Aug-20-26-som.jpg|'''2011 Aug 20th-26th''' (33 emails)
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− | File:2011-Aug-13-19-som.jpg|'''2011 Aug 13th-19th''' (21 emails)
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− | File:2011-Aug-6-12-som.jpg|'''2011 Aug 6th-12th''' (28 emails)
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− | File:2011-Jul-30-Aug-5-som.jpg|'''2011 Jul 30th-Aug 5th''' (29 emails) | |
| </gallery> | | </gallery> |
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