Package org.apache.sysds.runtime.compress.lib

Interface CLALibSelectionMult

public interface CLALibSelectionMult
This lib is responsible for selecting and extracting specific rows or columns from a compressed matrix. The operation performed is like a left matrix multiplication where the left side only have max 1 non zero per row.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final org.apache.commons.logging.Log
    LOG
     

  • Method Summary

    Static Methods
    Modifier and Type
    Method
    Description
    static boolean
    isSelectionMatrix(MatrixBlock mb)
    Analyze if the given matrix is a selection matrix if on the left side of a matrix multiplication.
    static MatrixBlock
    leftSelection(CompressedMatrixBlock right, MatrixBlock left, MatrixBlock ret, int k)
    Left selection where the left matrix is sparse with a max 1 non zero per row and that non zero is a 1.

  • Field Details

    • LOG

      static final org.apache.commons.logging.Log LOG

  • Method Details

    • leftSelection

      static MatrixBlock leftSelection(CompressedMatrixBlock right, MatrixBlock left, MatrixBlock ret, int k)
      Left selection where the left matrix is sparse with a max 1 non zero per row and that non zero is a 1.
      Parameters:
      right - Right hand side compressed matrix
      left - Left hand side matrix
      ret - Output matrix to put the result into.
      k - The parallelization degree.
      Returns:
      The selected rows and columns of the input matrix

    • isSelectionMatrix

      static boolean isSelectionMatrix(MatrixBlock mb)
      Analyze if the given matrix is a selection matrix if on the left side of a matrix multiplication.
      Parameters:
      mb - The given matrix that should be on the left side
      Returns:
      If it is selective