public class SynchronizedMatrix extends Object implements Matrix, AtomicMatrix
Matrix
decorator class that provides thread safe access to a
backing Matrix
instance.Matrix.Type
Constructor and Description |
---|
SynchronizedMatrix(Matrix matrix)
Creates a
SynchronizedMatrix that provides thread-safe access to
the provided Matrix instance. |
Modifier and Type | Method and Description |
---|---|
double |
addAndGet(int row,
int col,
double delta)
Return the value stored at (
row , col ) plus delta ,
and then increment the specified cell by delta . |
int |
columns()
Returns the number of columns in this
Matrix . |
double |
get(int row,
int col)
Returns the value of the
Matrix at the provided row and column. |
double |
getAndAdd(int row,
int col,
double delta)
Return the value stored at (
row , col ), and add delta to the same index. |
double[] |
getColumn(int column)
Returns the entire column.
|
DoubleVector |
getColumnVector(int column)
Returns the column as a vector.
|
double[] |
getRow(int row)
Returns the entire row.
|
DoubleVector |
getRowVector(int row)
Returns a
DoubleVector for an entire row. |
int |
rows()
Returns the number of rows in this
Matrix . |
void |
set(int row,
int col,
double val)
Sets the location at the row and column to the provided value.
|
void |
setColumn(int column,
double[] values)
Sets the values for the column of this
Matrix using the provided
array. |
void |
setColumn(int column,
DoubleVector values)
Sets the values for the column of this
Matrix using the provided
DoubleVector . |
void |
setRow(int row,
double[] values)
Sets the values for the row of this
Matrix using the provided
array. |
void |
setRow(int row,
DoubleVector values)
Sets the values for the row of this
Matrix using the provided
DoubleVector . |
double[][] |
toDenseArray()
Converts the
Matrix to a two dimensional array. |
public SynchronizedMatrix(Matrix matrix)
SynchronizedMatrix
that provides thread-safe access to
the provided Matrix
instance.public double addAndGet(int row, int col, double delta)
row
, col
) plus delta
,
and then increment the specified cell by delta
.addAndGet
in interface AtomicMatrix
row
- The row of the cell to modify and return.col
- The column of the cell to modify and return.delta
- The amount to change the specified cell.row
, col
) after
adding delta
.public double getAndAdd(int row, int col, double delta)
row
, col
), and add delta
to the same index.getAndAdd
in interface AtomicMatrix
row
- The row of the cell to return and modify.col
- The column of the cell to return and modify.delta
- The amount to change the specified cell.row
, col
) prior to
adding delta
.public int columns()
Matrix
.public double get(int row, int col)
Matrix
at the provided row and column.public double[] getColumn(int column)
public DoubleVector getColumnVector(int column)
SparseVector
instance.getColumnVector
in interface Matrix
column
- The column to return a DoubleVector
for.DoubleVector
representing the column at column
.public double[] getRow(int row)
public DoubleVector getRowVector(int row)
DoubleVector
for an entire row. Implementations should
return an approriately typed DoubleVector. Whether updates to the vector
are written through to the backing matrix is left open to the specific
implementation. Implementations that maintain their data in a sparse
format are encouraged to return a SparseVector
instance.getRowVector
in interface Matrix
row
- the index of the row to return.DoubleVector
representing the row at row
.public int rows()
Matrix
.public void set(int row, int col, double val)
public void setColumn(int column, double[] values)
Matrix
using the provided
array. Note that the array itself is not made internal to the instance
itself.public void setColumn(int column, DoubleVector values)
Matrix
using the provided
DoubleVector
. Note that the DoubleVector
itself is not
made internal to the instance itself.public void setRow(int row, double[] values)
Matrix
using the provided
array. Note that the array itself is not made internal to the instance
itself.public void setRow(int row, DoubleVector values)
Matrix
using the provided
DoubleVector
. Note that the DoubleVector
itself is not
made internal to the instance itself.public double[][] toDenseArray()
Matrix
to a two dimensional array. Note that for
large matrices, this may exhaust all available memory.toDenseArray
in interface Matrix
Matrix
.Copyright © 2012. All Rights Reserved.