Class

org.apache.spark.mllib.linalg.distributed

IndexedRowMatrix

Related Doc: package distributed

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class IndexedRowMatrix extends DistributedMatrix

Represents a row-oriented org.apache.spark.mllib.linalg.distributed.DistributedMatrix with indexed rows.

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@Since( "1.0.0" )
Source
IndexedRowMatrix.scala
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DistributedMatrix, Serializable, Serializable, AnyRef, Any
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  1. IndexedRowMatrix
  2. DistributedMatrix
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Instance Constructors

  1. new IndexedRowMatrix(rows: RDD[IndexedRow])

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    Alternative constructor leaving matrix dimensions to be determined automatically.

    Alternative constructor leaving matrix dimensions to be determined automatically.

    Annotations
    @Since( "1.0.0" )
  2. new IndexedRowMatrix(rows: RDD[IndexedRow], nRows: Long, nCols: Int)

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    rows

    indexed rows of this matrix

    nRows

    number of rows. A non-positive value means unknown, and then the number of rows will be determined by the max row index plus one.

    nCols

    number of columns. A non-positive value means unknown, and then the number of columns will be determined by the size of the first row.

    Annotations
    @Since( "1.0.0" )

Value Members

  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  3. final def ==(arg0: Any): Boolean

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  4. final def asInstanceOf[T0]: T0

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  5. def clone(): AnyRef

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    protected[java.lang]
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    @throws( ... )
  6. def columnSimilarities(): CoordinateMatrix

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    Compute all cosine similarities between columns of this matrix using the brute-force approach of computing normalized dot products.

    Compute all cosine similarities between columns of this matrix using the brute-force approach of computing normalized dot products.

    returns

    An n x n sparse upper-triangular matrix of cosine similarities between columns of this matrix.

    Annotations
    @Since( "1.6.0" )
  7. def computeGramianMatrix(): Matrix

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    Computes the Gramian matrix A^T A. Note that this cannot be computed on matrices with more than 65535 columns.

    Computes the Gramian matrix A^T A. Note that this cannot be computed on matrices with more than 65535 columns.

    Annotations
    @Since( "1.0.0" )
  8. def computeSVD(k: Int, computeU: Boolean = false, rCond: Double = 1e-9): SingularValueDecomposition[IndexedRowMatrix, Matrix]

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    Computes the singular value decomposition of this IndexedRowMatrix.

    Computes the singular value decomposition of this IndexedRowMatrix. Denote this matrix by A (m x n), this will compute matrices U, S, V such that A = U * S * V'.

    The cost and implementation of this method is identical to that in org.apache.spark.mllib.linalg.distributed.RowMatrix With the addition of indices.

    At most k largest non-zero singular values and associated vectors are returned. If there are k such values, then the dimensions of the return will be:

    U is an org.apache.spark.mllib.linalg.distributed.IndexedRowMatrix of size m x k that satisfies U'U = eye(k), s is a Vector of size k, holding the singular values in descending order, and V is a local Matrix of size n x k that satisfies V'V = eye(k).

    k

    number of singular values to keep. We might return less than k if there are numerically zero singular values. See rCond.

    computeU

    whether to compute U

    rCond

    the reciprocal condition number. All singular values smaller than rCond * sigma(0) are treated as zero, where sigma(0) is the largest singular value.

    returns

    SingularValueDecomposition(U, s, V)

    Annotations
    @Since( "1.0.0" )
  9. final def eq(arg0: AnyRef): Boolean

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  10. def equals(arg0: Any): Boolean

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  11. def finalize(): Unit

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    @throws( classOf[java.lang.Throwable] )
  12. final def getClass(): Class[_]

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  13. def hashCode(): Int

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  14. final def isInstanceOf[T0]: Boolean

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  15. def multiply(B: Matrix): IndexedRowMatrix

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    Multiply this matrix by a local matrix on the right.

    Multiply this matrix by a local matrix on the right.

    B

    a local matrix whose number of rows must match the number of columns of this matrix

    returns

    an IndexedRowMatrix representing the product, which preserves partitioning

    Annotations
    @Since( "1.0.0" )
  16. final def ne(arg0: AnyRef): Boolean

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  17. final def notify(): Unit

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  18. final def notifyAll(): Unit

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  19. def numCols(): Long

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    Gets or computes the number of columns.

    Gets or computes the number of columns.

    Definition Classes
    IndexedRowMatrixDistributedMatrix
    Annotations
    @Since( "1.0.0" )
  20. def numRows(): Long

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    Gets or computes the number of rows.

    Gets or computes the number of rows.

    Definition Classes
    IndexedRowMatrixDistributedMatrix
    Annotations
    @Since( "1.0.0" )
  21. val rows: RDD[IndexedRow]

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    indexed rows of this matrix

    indexed rows of this matrix

    Annotations
    @Since( "1.0.0" )
  22. final def synchronized[T0](arg0: ⇒ T0): T0

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  23. def toBlockMatrix(rowsPerBlock: Int, colsPerBlock: Int): BlockMatrix

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    Converts to BlockMatrix.

    Converts to BlockMatrix. Creates blocks of SparseMatrix.

    rowsPerBlock

    The number of rows of each block. The blocks at the bottom edge may have a smaller value. Must be an integer value greater than 0.

    colsPerBlock

    The number of columns of each block. The blocks at the right edge may have a smaller value. Must be an integer value greater than 0.

    returns

    a BlockMatrix

    Annotations
    @Since( "1.3.0" )
  24. def toBlockMatrix(): BlockMatrix

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    Converts to BlockMatrix.

    Converts to BlockMatrix. Creates blocks of SparseMatrix with size 1024 x 1024.

    Annotations
    @Since( "1.3.0" )
  25. def toCoordinateMatrix(): CoordinateMatrix

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    Converts this matrix to a org.apache.spark.mllib.linalg.distributed.CoordinateMatrix.

    Annotations
    @Since( "1.3.0" )
  26. def toRowMatrix(): RowMatrix

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    Drops row indices and converts this matrix to a org.apache.spark.mllib.linalg.distributed.RowMatrix.

    Drops row indices and converts this matrix to a org.apache.spark.mllib.linalg.distributed.RowMatrix.

    Annotations
    @Since( "1.0.0" )
  27. def toString(): String

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  28. final def wait(): Unit

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  29. final def wait(arg0: Long, arg1: Int): Unit

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  30. final def wait(arg0: Long): Unit

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Inherited from DistributedMatrix

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

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