Packages

class SparseMatrix extends Matrix

Column-major sparse matrix. The entry values are stored in Compressed Sparse Column (CSC) format. For example, the following matrix

1.0 0.0 4.0
0.0 3.0 5.0
2.0 0.0 6.0

is stored as values: [1.0, 2.0, 3.0, 4.0, 5.0, 6.0], rowIndices=[0, 2, 1, 0, 1, 2], colPointers=[0, 2, 3, 6].

Annotations
@Since( "2.0.0" )
Source
Matrices.scala
Linear Supertypes
Matrix, Serializable, Serializable, AnyRef, Any
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  1. SparseMatrix
  2. Matrix
  3. Serializable
  4. Serializable
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Instance Constructors

  1. new SparseMatrix(numRows: Int, numCols: Int, colPtrs: Array[Int], rowIndices: Array[Int], values: Array[Double])

    Column-major sparse matrix.

    Column-major sparse matrix. The entry values are stored in Compressed Sparse Column (CSC) format. For example, the following matrix

    1.0 0.0 4.0
0.0 3.0 5.0
2.0 0.0 6.0

    is stored as values: [1.0, 2.0, 3.0, 4.0, 5.0, 6.0], rowIndices=[0, 2, 1, 0, 1, 2], colPointers=[0, 2, 3, 6].

    numRows

    number of rows

    numCols

    number of columns

    colPtrs

    the index corresponding to the start of a new column

    rowIndices

    the row index of the entry. They must be in strictly increasing order for each column

    values

    non-zero matrix entries in column major

    Annotations
    @Since( "2.0.0" )
  2. new SparseMatrix(numRows: Int, numCols: Int, colPtrs: Array[Int], rowIndices: Array[Int], values: Array[Double], isTransposed: Boolean)

    numRows

    number of rows

    numCols

    number of columns

    colPtrs

    the index corresponding to the start of a new column (if not transposed)

    rowIndices

    the row index of the entry (if not transposed). They must be in strictly increasing order for each column

    values

    nonzero matrix entries in column major (if not transposed)

    isTransposed

    whether the matrix is transposed. If true, the matrix can be considered Compressed Sparse Row (CSR) format, where colPtrs behaves as rowPtrs, and rowIndices behave as colIndices, and values are stored in row major.

    Annotations
    @Since( "2.0.0" )

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. def apply(i: Int, j: Int): Double

    Gets the (i, j)-th element.

    Gets the (i, j)-th element.

    Definition Classes
    SparseMatrix → Matrix
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  7. def colIter: Iterator[Vector]

    Returns an iterator of column vectors.

    Returns an iterator of column vectors. This operation could be expensive, depending on the underlying storage.

    Definition Classes
    SparseMatrix → Matrix
  8. val colPtrs: Array[Int]
    Annotations
    @Since( "2.0.0" )
  9. def compressed: Matrix

    Returns a matrix in dense column major, dense row major, sparse row major, or sparse column major format, whichever uses less storage.

    Returns a matrix in dense column major, dense row major, sparse row major, or sparse column major format, whichever uses less storage. When dense representation is optimal, it maintains the current layout order.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.2.0" )
  10. def compressedColMajor: Matrix

    Returns a matrix in dense or sparse column major format, whichever uses less storage.

    Returns a matrix in dense or sparse column major format, whichever uses less storage.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.2.0" )
  11. def compressedRowMajor: Matrix

    Returns a matrix in dense or sparse row major format, whichever uses less storage.

    Returns a matrix in dense or sparse row major format, whichever uses less storage.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.2.0" )
  12. def copy: SparseMatrix

    Get a deep copy of the matrix.

    Get a deep copy of the matrix.

    Definition Classes
    SparseMatrix → Matrix
  13. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  14. def equals(o: Any): Boolean
    Definition Classes
    SparseMatrix → AnyRef → Any
  15. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  16. def foreachActive(f: (Int, Int, Double) ⇒ Unit): Unit

    Applies a function f to all the active elements of dense and sparse matrix.

    Applies a function f to all the active elements of dense and sparse matrix. The ordering of the elements are not defined.

    f

    the function takes three parameters where the first two parameters are the row and column indices respectively with the type Int, and the final parameter is the corresponding value in the matrix with type Double.

    Definition Classes
    SparseMatrix → Matrix
  17. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  18. def hashCode(): Int
    Definition Classes
    SparseMatrix → AnyRef → Any
  19. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  20. val isTransposed: Boolean

    Flag that keeps track whether the matrix is transposed or not.

    Flag that keeps track whether the matrix is transposed or not. False by default.

    Definition Classes
    SparseMatrix → Matrix
  21. def multiply(y: Vector): DenseVector

    Convenience method for Matrix-Vector multiplication.

    Convenience method for Matrix-Vector multiplication.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.0.0" )
  22. def multiply(y: DenseVector): DenseVector

    Convenience method for Matrix-DenseVector multiplication.

    Convenience method for Matrix-DenseVector multiplication. For binary compatibility.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.0.0" )
  23. def multiply(y: DenseMatrix): DenseMatrix

    Convenience method for Matrix-DenseMatrix multiplication.

    Convenience method for Matrix-DenseMatrix multiplication.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.0.0" )
  24. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  25. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  26. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  27. def numActives: Int

    Find the number of values stored explicitly.

    Find the number of values stored explicitly. These values can be zero as well.

    Definition Classes
    SparseMatrix → Matrix
  28. val numCols: Int

    Number of columns.

    Number of columns.

    Definition Classes
    SparseMatrix → Matrix
    Annotations
    @Since( "2.0.0" )
  29. def numNonzeros: Int

    Find the number of non-zero active values.

    Find the number of non-zero active values.

    Definition Classes
    SparseMatrix → Matrix
  30. val numRows: Int

    Number of rows.

    Number of rows.

    Definition Classes
    SparseMatrix → Matrix
    Annotations
    @Since( "2.0.0" )
  31. val rowIndices: Array[Int]
    Annotations
    @Since( "2.0.0" )
  32. def rowIter: Iterator[Vector]

    Returns an iterator of row vectors.

    Returns an iterator of row vectors. This operation could be expensive, depending on the underlying storage.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.0.0" )
  33. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  34. def toArray: Array[Double]

    Converts to a dense array in column major.

    Converts to a dense array in column major.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.0.0" )
  35. def toDense: DenseMatrix

    Converts this matrix to a dense matrix while maintaining the layout of the current matrix.

    Converts this matrix to a dense matrix while maintaining the layout of the current matrix.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.2.0" )
  36. def toDenseColMajor: DenseMatrix

    Converts this matrix to a dense matrix in column major order.

    Converts this matrix to a dense matrix in column major order.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.2.0" )
  37. def toDenseRowMajor: DenseMatrix

    Converts this matrix to a dense matrix in row major order.

    Converts this matrix to a dense matrix in row major order.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.2.0" )
  38. def toSparse: SparseMatrix

    Converts this matrix to a sparse matrix while maintaining the layout of the current matrix.

    Converts this matrix to a sparse matrix while maintaining the layout of the current matrix.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.2.0" )
  39. def toSparseColMajor: SparseMatrix

    Converts this matrix to a sparse matrix in column major order.

    Converts this matrix to a sparse matrix in column major order.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.2.0" )
  40. def toSparseRowMajor: SparseMatrix

    Converts this matrix to a sparse matrix in row major order.

    Converts this matrix to a sparse matrix in row major order.

    Definition Classes
    Matrix
    Annotations
    @Since( "2.2.0" )
  41. def toString(maxLines: Int, maxLineWidth: Int): String

    A human readable representation of the matrix with maximum lines and width

    A human readable representation of the matrix with maximum lines and width

    Definition Classes
    Matrix
    Annotations
    @Since( "2.0.0" )
  42. def toString(): String

    A human readable representation of the matrix

    A human readable representation of the matrix

    Definition Classes
    Matrix → AnyRef → Any
  43. def transpose: SparseMatrix

    Transpose the Matrix.

    Transpose the Matrix. Returns a new Matrix instance sharing the same underlying data.

    Definition Classes
    SparseMatrix → Matrix
  44. val values: Array[Double]
    Annotations
    @Since( "2.0.0" )
  45. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  46. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  47. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from Matrix

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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