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Term Document Entropy

Other Data TypesText ProcessingFrequencies
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This node computes the informational entropy of each term in each document. The nodes requires a bag of words table as input and appends an additional column to the output table, containing the entropy values. If a term occurs once in every document, its entropy for each document is 0. Any other combination of frequencies determines an entropy weight between 0 and 1. Please note, that the computational complexity of of the entropy calculation is greater than the number of terms times the number of documents. For big bag of words input tables the computation can be quite time consuming.

Node details

Input ports
  1. Type: Table
    Terms and related documents input table
    The input table which contains terms and documents.
Output ports
  1. Type: Table
    Terms and documents output table
    The output table with terms, documents and a corresponding entropy value.

Extension

The Term Document Entropy node is part of this extension:

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