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# WhatsHot Information

WhatsHot information is the most relevant information that is available for the clusters that the IDOL Category component identifies in your snapshot. Unlike WhatsNew information, this is not restricted to new information, which means that it can follow the progress of particular news items over time.

You can cluster WhatsHot information from a snapshot display this information in your user interface. You can also generate a 2-D map from WhatsHot information.

The 2-D map gives a visualization of the similarities and difference between clusters. Category uses a dimensionality reduction algorithm to maintain intercluster similarity measures so that similar clusters are close together and very different clusters are not close together. Category uses the distribution of documents throughout the space, along with nonlinear remapping, to create the landscape.

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