Parallel Colt 0.7.2

cern.colt.matrix.tdouble.impl
Class CCMDoubleMatrix2D

java.lang.Object
  extended by cern.colt.PersistentObject
      extended by cern.colt.matrix.AbstractMatrix
          extended by cern.colt.matrix.AbstractMatrix2D
              extended by cern.colt.matrix.tdouble.DoubleMatrix2D
                  extended by cern.colt.matrix.tdouble.impl.WrapperDoubleMatrix2D
                      extended by cern.colt.matrix.tdouble.impl.CCMDoubleMatrix2D
All Implemented Interfaces:
Serializable, Cloneable

public class CCMDoubleMatrix2D
extends WrapperDoubleMatrix2D

Sparse column-compressed-modified 2-d matrix holding double elements. Each column is stored as SparseDoubleMatrix1D.

Author:
Piotr Wendykier (piotr.wendykier@gmail.com)
See Also:
Serialized Form

Field Summary
 
Fields inherited from class cern.colt.PersistentObject
serialVersionUID
 
Constructor Summary
CCMDoubleMatrix2D(int rows, int columns)
          Constructs a matrix with a given number of rows and columns.
 
Method Summary
 SparseDoubleMatrix1D[] elements()
          Returns the elements of this matrix.
 double getQuick(int row, int column)
          Returns the matrix cell value at coordinate [row,column].
 DoubleMatrix2D 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, double value)
          Sets the matrix cell at coordinate [row,column] to the specified value.
 void trimToSize()
          Releases any superfluous internal memory.
 SparseDoubleMatrix1D viewColumn(int column)
          Constructs and returns a new slice view representing the rows of the given column.
 
Methods inherited from class cern.colt.matrix.tdouble.impl.WrapperDoubleMatrix2D
equals, equals, like1D, setNcolumns, setNrows, vectorize, viewColumnFlip, viewDice, viewPart, viewRow, viewRowFlip, viewSelection, viewStrides
 
Methods inherited from class cern.colt.matrix.tdouble.DoubleMatrix2D
aggregate, aggregate, aggregate, aggregate, assign, assign, assign, assign, assign, assign, assign, assign, assign, assign, cardinality, copy, forEachNonZero, get, getMaxLocation, getMinLocation, getNegativeValues, getNonZeros, getPositiveValues, like, normalize, set, toArray, toString, viewSelection, viewSelection, viewSorted, zAssign8Neighbors, zMult, zMult, zMult, zMult, zSum
 
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

CCMDoubleMatrix2D

public CCMDoubleMatrix2D(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 SparseDoubleMatrix1D[] elements()
Description copied from class: DoubleMatrix2D
Returns the elements of this matrix.

Overrides:
elements in class WrapperDoubleMatrix2D
Returns:
the elements

getQuick

public double getQuick(int row,
                       int column)
Description copied from class: WrapperDoubleMatrix2D
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 WrapperDoubleMatrix2D
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,
                     double value)
Description copied from class: WrapperDoubleMatrix2D
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 WrapperDoubleMatrix2D
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 SparseDoubleMatrix1D viewColumn(int column)
Description copied from class: WrapperDoubleMatrix2D
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 WrapperDoubleMatrix2D
Parameters:
column - the column to fix.
Returns:
a new slice view.
See Also:
WrapperDoubleMatrix2D.viewRow(int)

like

public DoubleMatrix2D like(int rows,
                           int columns)
Description copied from class: WrapperDoubleMatrix2D
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 DenseDoubleMatrix2D the new matrix must also be of type DenseDoubleMatrix2D, if the receiver is an instance of type SparseDoubleMatrix2D the new matrix must also be of type SparseDoubleMatrix2D, etc. In general, the new matrix should have internal parametrization as similar as possible.

Overrides:
like in class WrapperDoubleMatrix2D
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.

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