Package org.ejml.data

Class DMatrixRBlock

java.lang.Object
org.ejml.data.DMatrixD1
org.ejml.data.DMatrixRBlock
All Implemented Interfaces:
Serializable, DMatrix, Matrix, ReshapeMatrix
public class DMatrixRBlock extends DMatrixD1
A row-major block matrix declared on to one continuous array.
See Also:

  • Field Details

    • blockLength

      public int blockLength

  • Constructor Details

    • DMatrixRBlock

      public DMatrixRBlock(int numRows, int numCols, int blockLength)

    • DMatrixRBlock

      public DMatrixRBlock(int numRows, int numCols)

    • DMatrixRBlock

      public DMatrixRBlock()

  • Method Details

    • set

      public void set(DMatrixRBlock A)

    • wrap

      public static DMatrixRBlock wrap(double[] data, int numRows, int numCols, int blockLength)

    • getData

      public double[] getData()
      Description copied from class: DMatrixD1
      Used to get a reference to the internal data.
      Overrides:
      getData in class DMatrixD1
      Returns:
      Reference to the matrix's data.

    • reshape

      public void reshape(int numRows, int numCols, boolean saveValues)
      Description copied from class: DMatrixD1

      Changes the number of rows and columns in the matrix, allowing its size to grow or shrink. If the saveValues flag is set to true, then the previous values will be maintained, but reassigned to new elements in a row-major ordering. If saveValues is false values will only be maintained when the requested size is less than or equal to the internal array size. The primary use for this function is to encourage data reuse and avoid unnecessarily declaring and initialization of new memory.

      Examples:
      [ 1 2 ; 3 4 ] → reshape( 2 , 3 , true ) = [ 1 2 3 ; 4 0 0 ]
      [ 1 2 ; 3 4 ] → reshape( 1 , 2 , true ) = [ 1 2 ]
      [ 1 2 ; 3 4 ] → reshape( 1 , 2 , false ) = [ 1 2 ]
      [ 1 2 ; 3 4 ] → reshape( 2 , 3 , false ) = [ 0 0 0 ; 0 0 0 ]

      Specified by:
      reshape in class DMatrixD1
      Parameters:
      numRows - The new number of rows in the matrix.
      numCols - The new number of columns in the matrix.
      saveValues - If true then the value of each element will be save using a row-major reordering. Typically this should be false.

    • reshape

      public void reshape(int numRows, int numCols, int blockLength, boolean saveValues)

    • getIndex

      public int getIndex(int row, int col)
      Description copied from class: DMatrixD1
      Returns the internal array index for the specified row and column.
      Specified by:
      getIndex in class DMatrixD1
      Parameters:
      row - Row index.
      col - Column index.
      Returns:
      Internal array index.

    • get

      public double get(int row, int col)
      Description copied from interface: DMatrix
      Returns the value of value of the specified matrix element.
      Parameters:
      row - Matrix element's row index..
      col - Matrix element's column index.
      Returns:
      The specified element's value.

    • unsafe_get

      public double unsafe_get(int row, int col)
      Description copied from interface: DMatrix
      Same as DMatrix.get(int, int) but does not perform bounds check on input parameters. This results in about a 25% speed increase but potentially sacrifices stability and makes it more difficult to track down simple errors. It is not recommended that this function be used, except in highly optimized code where the bounds are implicitly being checked.
      Parameters:
      row - Matrix element's row index..
      col - Matrix element's column index.
      Returns:
      The specified element's value.

    • set

      public void set(int row, int col, double val)
      Description copied from interface: DMatrix
      Sets the value of the specified matrix element.
      Parameters:
      row - Matrix element's row index..
      col - Matrix element's column index.
      val - The element's new value.

    • unsafe_set

      public void unsafe_set(int row, int col, double val)
      Description copied from interface: DMatrix
      Same as Matrix.setTo(org.ejml.data.Matrix) but does not perform bounds check on input parameters. This results in about a 25% speed increase but potentially sacrifices stability and makes it more difficult to track down simple errors. It is not recommended that this function be used, except in highly optimized code where the bounds are implicitly being checked.
      Parameters:
      row - Matrix element's row index..
      col - Matrix element's column index.
      val - The element's new value.

    • getNumRows

      public int getNumRows()
      Description copied from class: DMatrixD1
      Returns the number of rows in this matrix.
      Specified by:
      getNumRows in interface Matrix
      Overrides:
      getNumRows in class DMatrixD1
      Returns:
      Number of rows.

    • getNumCols

      public int getNumCols()
      Description copied from class: DMatrixD1
      Returns the number of columns in this matrix.
      Specified by:
      getNumCols in interface Matrix
      Overrides:
      getNumCols in class DMatrixD1
      Returns:
      Number of columns.

    • zero

      public void zero()
      Description copied from interface: Matrix
      Sets all values inside the matrix to zero

    • createLike

      public <T extends Matrix> T createLike()
      Description copied from interface: Matrix
      Creates a new matrix with the same shape as this matrix

    • create

      public <T extends Matrix> T create(int numRows, int numCols)
      Description copied from interface: Matrix
      Creates a new matrix of the same type with the specified shape

    • setTo

      public void setTo(Matrix original)
      Description copied from interface: Matrix
      Sets this matrix to be identical to the 'original' matrix passed in.

    • copy

      public DMatrixRBlock copy()
      Description copied from interface: Matrix
      Creates an exact copy of the matrix

    • getType

      public MatrixType getType()
      Description copied from interface: Matrix
      Returns the type of matrix