JAMA Shortcoming

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2 Responses to “JAMA Shortcoming”

  1. Chinni Says:

    I am very curious why “JAMA’ throwing exception for 2 x 3 Matrix AND NOT FOR 3 X 2 Matrix.

    • shakthydoss Says:

      Dear Chinna ,

      JAMA lib works with an assumption that row length should be greater than column (e.g. 3 X 2) while using SVD. In case out matrix is TDM then U matrix from SVD correspond to Terms and V matrix from SVD corresponds to Documents.

      Some times row length of TDM is less than column (2 x 3) , then JAMA developer ask us take transpose i.e make column as rows and make row as column (3 X 2) for using SVD. Then U matrix from SVD correspond to Documents and V matrix from SVD corresponds to Term.

      This transpose of row as columns and column as row is not dynamically handled in JAMA lib as it was handled in EJML.
      Now i hope would have understand why JAMA throws an exception 🙂


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