cern.colt.matrix.tobject.impl
Class SparseCCMObjectMatrix2D

java.lang.Object
  cern.colt.PersistentObject
      cern.colt.matrix.AbstractMatrix
          cern.colt.matrix.AbstractMatrix2D
              cern.colt.matrix.tobject.ObjectMatrix2D
                  cern.colt.matrix.tobject.impl.WrapperObjectMatrix2D
                      cern.colt.matrix.tobject.impl.SparseCCMObjectMatrix2D

All Implemented Interfaces:

Serializable, Cloneable

public class SparseCCMObjectMatrix2D
extends WrapperObjectMatrix2D

Sparse column-compressed-modified 2-d matrix holding Object elements. Each column is stored as SparseObjectMatrix1D.

Author:

Piotr Wendykier (piotr.wendykier@gmail.com)

See Also:

Serialized Form

Constructor Summary

SparseCCMObjectMatrix2D(int rows, int columns)
Constructs a matrix with a given number of rows and columns.

Method Summary

SparseObjectMatrix1D[]	elements() Returns the elements of this matrix.
Object	getQuick(int row, int column) Returns the matrix cell value at coordinate [row,column].
ObjectMatrix2D	like(int rows, int columns) Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified number of rows and columns.
void	setQuick(int row, int column, Object value) Sets the matrix cell at coordinate [row,column] to the specified value.
void	trimToSize() Releases any superfluous internal memory.
SparseObjectMatrix1D	viewColumn(int column) Constructs and returns a new slice view representing the rows of the given column.

Methods inherited from class cern.colt.matrix.tobject.impl.WrapperObjectMatrix2D

assign, assign, assign, equals, like1D, vectorize, viewColumnFlip, viewDice, viewPart, viewRow, viewRowFlip, viewSelection, viewStrides

Methods inherited from class cern.colt.matrix.tobject.ObjectMatrix2D

aggregate, aggregate, aggregate, aggregate, assign, assign, assign, assign, assign, assign, assign, cardinality, copy, equals, forEachNonZero, get, getNonZeros, like, set, toArray, toString, viewSelection, viewSorted

Methods inherited from class cern.colt.matrix.AbstractMatrix2D

checkShape, checkShape, columns, columnStride, index, rows, rowStride, size, toStringShort

Methods inherited from class cern.colt.matrix.AbstractMatrix

ensureCapacity, isView

Methods inherited from class cern.colt.PersistentObject

clone

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

SparseCCMObjectMatrix2D

public SparseCCMObjectMatrix2D(int rows,
                               int columns)

Constructs a matrix with a given number of rows and columns. All entries are initially 0.

Parameters:

rows - the number of rows the matrix shall have.

columns - the number of columns the matrix shall have.

Throws:

IllegalArgumentException - if rows<0 || columns<0 || (double)columns*rows > Integer.MAX_VALUE .

Method Detail

elements

public SparseObjectMatrix1D[] elements()

Description copied from class: ObjectMatrix2D

Returns the elements of this matrix.

Overrides:

elements in class WrapperObjectMatrix2D

Returns:

the elements

getQuick

public Object getQuick(int row,
                       int column)

Description copied from class: ObjectMatrix2D

Returns the matrix cell value at coordinate [row,column].

Provided with invalid parameters this method may return invalid objects without throwing any exception. You should only use this method when you are absolutely sure that the coordinate is within bounds. Precondition (unchecked): 0 <= column < columns() && 0 <= row < rows().

Overrides:

getQuick in class WrapperObjectMatrix2D

Parameters:

row - the index of the row-coordinate.

column - the index of the column-coordinate.

Returns:

the value at the specified coordinate.

setQuick

public void setQuick(int row,
                     int column,
                     Object value)

Description copied from class: ObjectMatrix2D

Sets the matrix cell at coordinate [row,column] to the specified value.

Provided with invalid parameters this method may access illegal indexes without throwing any exception. You should only use this method when you are absolutely sure that the coordinate is within bounds. Precondition (unchecked): 0 <= column < columns() && 0 <= row < rows().

Overrides:

setQuick in class WrapperObjectMatrix2D

Parameters:

row - the index of the row-coordinate.

column - the index of the column-coordinate.

value - the value to be filled into the specified cell.

trimToSize

public void trimToSize()

Description copied from class: AbstractMatrix

Releases any superfluous internal memory. An application can use this operation to minimize the storage of the receiver.

This default implementation does nothing. Override this method if necessary.

Overrides:

trimToSize in class AbstractMatrix

viewColumn

public SparseObjectMatrix1D viewColumn(int column)

Description copied from class: ObjectMatrix2D

Constructs and returns a new slice view representing the rows of the given column. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa. To obtain a slice view on subranges, construct a sub-ranging view ( viewPart(...)), then apply this method to the sub-range view.

Example:

2 x 3 matrix: 1, 2, 3 4, 5, 6

viewColumn(0) ==>

Matrix1D of size 2: 1, 4

Overrides:

viewColumn in class WrapperObjectMatrix2D

Parameters:

column - the column to fix.

Returns:

a new slice view.

See Also:

ObjectMatrix2D.viewRow(int)

like

public ObjectMatrix2D like(int rows,
                           int columns)

Description copied from class: ObjectMatrix2D

Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified number of rows and columns. For example, if the receiver is an instance of type DenseObjectMatrix2D the new matrix must also be of type DenseObjectMatrix2D, if the receiver is an instance of type SparseObjectMatrix2D the new matrix must also be of type SparseObjectMatrix2D, etc. In general, the new matrix should have internal parametrization as similar as possible.

Overrides:

like in class WrapperObjectMatrix2D

Parameters:

rows - the number of rows the matrix shall have.

columns - the number of columns the matrix shall have.

Returns:

a new empty matrix of the same dynamic type.