public class BlockRealMatrix extends AbstractRealMatrix implements Serializable
This implementation is specially designed to be cache-friendly. Square blocks are stored as small arrays and allow efficient traversal of data both in row major direction and columns major direction, one block at a time. This greatly increases performances for algorithms that use crossed directions loops like multiplication or transposition.
The size of square blocks is a static parameter. It may be tuned according to the cache size of the target computer processor. As a rule of thumbs, it should be the largest value that allows three blocks to be simultaneously cached (this is necessary for example for matrix multiplication). The default value is to use 52x52 blocks which is well suited for processors with 64k L1 cache (one block holds 2704 values or 21632 bytes). This value could be lowered to 36x36 for processors with 32k L1 cache.
The regular blocks represent BLOCK_SIZE
x BLOCK_SIZE
squares. Blocks
at right hand side and bottom side which may be smaller to fit matrix dimensions. The square
blocks are flattened in row major order in single dimension arrays which are therefore
BLOCK_SIZE
2 elements long for regular blocks. The blocks are themselves
organized in row major order.
As an example, for a block size of 52x52, a 100x60 matrix would be stored in 4 blocks. Block 0 would be a double[2704] array holding the upper left 52x52 square, block 1 would be a double[416] array holding the upper right 52x8 rectangle, block 2 would be a double[2496] array holding the lower left 48x52 rectangle and block 3 would be a double[384] array holding the lower right 48x8 rectangle.
The layout complexity overhead versus simple mapping of matrices to java arrays is negligible for small matrices (about 1%). The gain from cache efficiency leads to up to 3-fold improvements for matrices of moderate to large size.
Modifier and Type | Field and Description |
---|---|
static int |
BLOCK_SIZE
Block size.
|
Constructor and Description |
---|
BlockRealMatrix(double[][] rawData)
Create a new dense matrix copying entries from raw layout data.
|
BlockRealMatrix(int rows,
int columns)
Create a new matrix with the supplied row and column dimensions.
|
BlockRealMatrix(int rows,
int columns,
double[][] blockData,
boolean copyArray)
Create a new dense matrix copying entries from block layout data.
|
Modifier and Type | Method and Description |
---|---|
BlockRealMatrix |
add(BlockRealMatrix m)
Compute the sum of this matrix and
m . |
BlockRealMatrix |
add(RealMatrix m)
Compute the sum of this and m.
|
void |
addToEntry(int row,
int column,
double increment)
Change an entry in the specified row and column.
|
BlockRealMatrix |
copy()
Returns a (deep) copy of this.
|
static double[][] |
createBlocksLayout(int rows,
int columns)
Create a data array in blocks layout.
|
BlockRealMatrix |
createMatrix(int rowDimension,
int columnDimension)
Create a new RealMatrix of the same type as the instance with the supplied
row and column dimensions.
|
double[] |
getColumn(int column)
Get the entries at the given column index as an array.
|
int |
getColumnDimension()
Returns the number of columns of this matrix.
|
BlockRealMatrix |
getColumnMatrix(int column)
Get the entries at the given column index
as a column matrix.
|
RealVector |
getColumnVector(int column)
Get the entries at the given column index
as a vector.
|
double[][] |
getData()
Returns matrix entries as a two-dimensional array.
|
double |
getEntry(int row,
int column)
Get the entry in the specified row and column.
|
double |
getFrobeniusNorm()
Returns the
Frobenius norm of the matrix.
|
double |
getNorm()
Returns the
maximum absolute row sum norm of the matrix.
|
double[] |
getRow(int row)
Get the entries at the given row index.
|
int |
getRowDimension()
Returns the number of rows of this matrix.
|
BlockRealMatrix |
getRowMatrix(int row)
Geet the entries at the given row index
as a row matrix.
|
RealVector |
getRowVector(int row)
Returns the entries in row number
row
as a vector. |
BlockRealMatrix |
getSubMatrix(int startRow,
int endRow,
int startColumn,
int endColumn)
Gets a submatrix.
|
BlockRealMatrix |
multiply(BlockRealMatrix m)
Returns the result of postmultiplying this by
m . |
BlockRealMatrix |
multiply(RealMatrix m)
Returns the result of postmultiplying this by m.
|
void |
multiplyEntry(int row,
int column,
double factor)
Change an entry in the specified row and column.
|
double[] |
operate(double[] v)
Returns the result of multiplying this by the vector
v . |
double[] |
preMultiply(double[] v)
Returns the (row) vector result of premultiplying this by the vector
v . |
BlockRealMatrix |
scalarAdd(double d)
Returns the result of adding d to each entry of this.
|
RealMatrix |
scalarMultiply(double d)
Returns the result multiplying each entry of this by d.
|
void |
setColumn(int column,
double[] array)
Set the entries at the given column index
as a column matrix array.
|
void |
setColumnMatrix(int column,
RealMatrix matrix)
Set the entries at the given column index
as a column matrix.
|
void |
setColumnVector(int column,
RealVector vector)
Set the entries at the given column index
as a vector.
|
void |
setEntry(int row,
int column,
double value)
Set the entry in the specified row and column.
|
void |
setRow(int row,
double[] array)
Set the entries at the given row index
as a row matrix.
|
void |
setRowMatrix(int row,
BlockRealMatrix matrix)
Sets the entries in row number
row
as a row matrix. |
void |
setRowMatrix(int row,
RealMatrix matrix)
Set the entries at the given row index
as a row matrix.
|
void |
setRowVector(int row,
RealVector vector)
Set the entries at the given row index.
|
void |
setSubMatrix(double[][] subMatrix,
int row,
int column)
Replace the submatrix starting at
row, column using data in
the input subMatrix array. |
BlockRealMatrix |
subtract(BlockRealMatrix m)
Subtract
m from this matrix. |
BlockRealMatrix |
subtract(RealMatrix m)
Compute this minus m.
|
static double[][] |
toBlocksLayout(double[][] rawData)
Convert a data array from raw layout to blocks layout.
|
BlockRealMatrix |
transpose()
Returns the transpose of this matrix.
|
double |
walkInOptimizedOrder(RealMatrixChangingVisitor visitor)
Visit (and possibly change) all matrix entries using the fastest possible order.
|
double |
walkInOptimizedOrder(RealMatrixChangingVisitor visitor,
int startRow,
int endRow,
int startColumn,
int endColumn)
Visit (and possibly change) some matrix entries using the fastest possible order.
|
double |
walkInOptimizedOrder(RealMatrixPreservingVisitor visitor)
Visit (but don't change) all matrix entries using the fastest possible order.
|
double |
walkInOptimizedOrder(RealMatrixPreservingVisitor visitor,
int startRow,
int endRow,
int startColumn,
int endColumn)
Visit (but don't change) some matrix entries using the fastest possible order.
|
double |
walkInRowOrder(RealMatrixChangingVisitor visitor)
Visit (and possibly change) all matrix entries in row order.
|
double |
walkInRowOrder(RealMatrixChangingVisitor visitor,
int startRow,
int endRow,
int startColumn,
int endColumn)
Visit (and possibly change) some matrix entries in row order.
|
double |
walkInRowOrder(RealMatrixPreservingVisitor visitor)
Visit (but don't change) all matrix entries in row order.
|
double |
walkInRowOrder(RealMatrixPreservingVisitor visitor,
int startRow,
int endRow,
int startColumn,
int endColumn)
Visit (but don't change) some matrix entries in row order.
|
copySubMatrix, copySubMatrix, equals, getSubMatrix, getTrace, hashCode, isSquare, operate, power, preMultiply, preMultiply, toString, walkInColumnOrder, walkInColumnOrder, walkInColumnOrder, walkInColumnOrder
isTransposable, operateTranspose
public static final int BLOCK_SIZE
public BlockRealMatrix(int rows, int columns)
rows
- the number of rows in the new matrixcolumns
- the number of columns in the new matrixNotStrictlyPositiveException
- if row or column dimension is not positive.public BlockRealMatrix(double[][] rawData)
The input array must already be in raw layout.
Calling this constructor is equivalent to call:
matrix = new BlockRealMatrix(rawData.length, rawData[0].length, toBlocksLayout(rawData), false);
rawData
- data for new matrix, in raw layoutDimensionMismatchException
- if the shape of blockData
is
inconsistent with block layout.BlockRealMatrix(int, int, double[][], boolean)
public BlockRealMatrix(int rows, int columns, double[][] blockData, boolean copyArray)
The input array must already be in blocks layout.
rows
- Number of rows in the new matrix.columns
- Number of columns in the new matrix.blockData
- data for new matrixcopyArray
- Whether the input array will be copied or referenced.DimensionMismatchException
- if the shape of blockData
is
inconsistent with block layout.createBlocksLayout(int, int)
,
toBlocksLayout(double[][])
,
BlockRealMatrix(double[][])
public static double[][] toBlocksLayout(double[][] rawData)
Raw layout is the straightforward layout where element at row i and
column j is in array element rawData[i][j]
. Blocks layout
is the layout used in BlockRealMatrix
instances, where the matrix
is split in square blocks (except at right and bottom side where blocks may
be rectangular to fit matrix size) and each block is stored in a flattened
one-dimensional array.
This method creates an array in blocks layout from an input array in raw layout.
It can be used to provide the array argument of the BlockRealMatrix(int, int, double[][], boolean)
constructor.
rawData
- Data array in raw layout.DimensionMismatchException
- if rawData
is not rectangular.createBlocksLayout(int, int)
,
BlockRealMatrix(int, int, double[][], boolean)
public static double[][] createBlocksLayout(int rows, int columns)
This method can be used to create the array argument of the BlockRealMatrix(int, int, double[][], boolean)
constructor.
rows
- Number of rows in the new matrix.columns
- Number of columns in the new matrix.toBlocksLayout(double[][])
,
BlockRealMatrix(int, int, double[][], boolean)
public BlockRealMatrix createMatrix(int rowDimension, int columnDimension)
createMatrix
in interface RealMatrix
createMatrix
in class AbstractRealMatrix
rowDimension
- the number of rows in the new matrixcolumnDimension
- the number of columns in the new matrixpublic BlockRealMatrix copy()
copy
in interface RealMatrix
copy
in class AbstractRealMatrix
public BlockRealMatrix add(RealMatrix m)
add
in interface RealMatrix
add
in class AbstractRealMatrix
m
- matrix to be addedpublic BlockRealMatrix add(BlockRealMatrix m)
m
.m
- Matrix to be added.this
+ m.MatrixDimensionMismatchException
- if m
is not the same
size as this matrix.public BlockRealMatrix subtract(RealMatrix m)
subtract
in interface RealMatrix
subtract
in class AbstractRealMatrix
m
- matrix to be subtractedpublic BlockRealMatrix subtract(BlockRealMatrix m)
m
from this matrix.m
- Matrix to be subtracted.this
- m.MatrixDimensionMismatchException
- if m
is not the
same size as this matrix.public BlockRealMatrix scalarAdd(double d)
scalarAdd
in interface RealMatrix
scalarAdd
in class AbstractRealMatrix
d
- value to be added to each entrypublic RealMatrix scalarMultiply(double d)
scalarMultiply
in interface RealMatrix
scalarMultiply
in class AbstractRealMatrix
d
- value to multiply all entries bypublic BlockRealMatrix multiply(RealMatrix m)
multiply
in interface RealMatrix
multiply
in class AbstractRealMatrix
m
- matrix to postmultiply bypublic BlockRealMatrix multiply(BlockRealMatrix m)
m
.m
- Matrix to postmultiply by.this
* m.MatrixDimensionMismatchException
- if the matrices are not
compatible.public double[][] getData()
getData
in interface RealMatrix
getData
in class AbstractRealMatrix
public double getNorm()
getNorm
in interface RealMatrix
getNorm
in class AbstractRealMatrix
public double getFrobeniusNorm()
getFrobeniusNorm
in interface RealMatrix
getFrobeniusNorm
in class AbstractRealMatrix
public BlockRealMatrix getSubMatrix(int startRow, int endRow, int startColumn, int endColumn)
getSubMatrix
in interface RealMatrix
getSubMatrix
in class AbstractRealMatrix
startRow
- Initial row indexendRow
- Final row index (inclusive)startColumn
- Initial column indexendColumn
- Final column index (inclusive)public void setSubMatrix(double[][] subMatrix, int row, int column) throws NoDataException, NullArgumentException
row, column
using data in
the input subMatrix
array. Indexes are 0-based.
Example:
Starting with
1 2 3 4 5 6 7 8 9 0 1 2and
subMatrix = {{3, 4} {5,6}}
, invoking
setSubMatrix(subMatrix,1,1))
will result in 1 2 3 4 5 3 4 8 9 5 6 2
setSubMatrix
in interface RealMatrix
setSubMatrix
in class AbstractRealMatrix
subMatrix
- array containing the submatrix replacement datarow
- row coordinate of the top, left element to be replacedcolumn
- column coordinate of the top, left element to be replacedNullArgumentException
- if subMatrix
is null
.NoDataException
public BlockRealMatrix getRowMatrix(int row)
getRowMatrix
in interface RealMatrix
getRowMatrix
in class AbstractRealMatrix
row
- Row to be fetched.public void setRowMatrix(int row, RealMatrix matrix)
setRowMatrix
in interface RealMatrix
setRowMatrix
in class AbstractRealMatrix
row
- Row to be set.matrix
- Row matrix (must have one row and the same number of
columns as the instance).public void setRowMatrix(int row, BlockRealMatrix matrix)
row
as a row matrix. Row indices start at 0.row
- the row to be setmatrix
- row matrix (must have one row and the same number of columns
as the instance)OutOfRangeException
- if the specified row index is invalid.MatrixDimensionMismatchException
- if the matrix dimensions do
not match one instance row.public BlockRealMatrix getColumnMatrix(int column)
getColumnMatrix
in interface RealMatrix
getColumnMatrix
in class AbstractRealMatrix
column
- Column to be fetched.public void setColumnMatrix(int column, RealMatrix matrix)
setColumnMatrix
in interface RealMatrix
setColumnMatrix
in class AbstractRealMatrix
column
- Column to be set.matrix
- Column matrix (must have one column and the same number
of rows as the instance).public RealVector getRowVector(int row)
row
as a vector. Row indices start at 0.getRowVector
in interface RealMatrix
getRowVector
in class AbstractRealMatrix
row
- Row to be fetched.public void setRowVector(int row, RealVector vector)
setRowVector
in interface RealMatrix
setRowVector
in class AbstractRealMatrix
row
- Row to be set.vector
- row vector (must have the same number of columns
as the instance).public RealVector getColumnVector(int column)
getColumnVector
in interface RealMatrix
getColumnVector
in class AbstractRealMatrix
column
- Column to be fetched.public void setColumnVector(int column, RealVector vector)
setColumnVector
in interface RealMatrix
setColumnVector
in class AbstractRealMatrix
column
- Column to be set.vector
- column vector (must have the same number of rows as
the instance).public double[] getRow(int row)
getRow
in interface RealMatrix
getRow
in class AbstractRealMatrix
row
- Row to be fetched.public void setRow(int row, double[] array)
setRow
in interface RealMatrix
setRow
in class AbstractRealMatrix
row
- Row to be set.array
- Row matrix (must have the same number of columns as
the instance)public double[] getColumn(int column)
getColumn
in interface RealMatrix
getColumn
in class AbstractRealMatrix
column
- Column to be fetched.public void setColumn(int column, double[] array)
setColumn
in interface RealMatrix
setColumn
in class AbstractRealMatrix
column
- Column to be set.array
- Column array (must have the same number of rows as
the instance).public double getEntry(int row, int column)
getEntry
in interface RealMatrix
getEntry
in class AbstractRealMatrix
row
- Row location of entry to be fetched.column
- Column location of entry to be fetched.(row, column)
.public void setEntry(int row, int column, double value)
setEntry
in interface RealMatrix
setEntry
in class AbstractRealMatrix
row
- Row location of entry to be set.column
- Column location of entry to be set.value
- matrix entry to be set.public void addToEntry(int row, int column, double increment)
addToEntry
in interface RealMatrix
addToEntry
in class AbstractRealMatrix
row
- Row location of entry to be set.column
- Column location of entry to be set.increment
- value to add to the matrix entry.public void multiplyEntry(int row, int column, double factor)
multiplyEntry
in interface RealMatrix
multiplyEntry
in class AbstractRealMatrix
row
- Row location of entry to be set.column
- Column location of entry to be set.factor
- Multiplication factor for the matrix entry.public BlockRealMatrix transpose()
transpose
in interface RealMatrix
transpose
in class AbstractRealMatrix
public int getRowDimension()
getRowDimension
in interface AnyMatrix
getRowDimension
in class AbstractRealMatrix
public int getColumnDimension()
getColumnDimension
in interface AnyMatrix
getColumnDimension
in class AbstractRealMatrix
public double[] operate(double[] v)
v
.operate
in interface RealMatrix
operate
in class AbstractRealMatrix
v
- the vector to operate onpublic double[] preMultiply(double[] v)
v
.preMultiply
in interface RealMatrix
preMultiply
in class AbstractRealMatrix
v
- the row vector to premultiply bypublic double walkInRowOrder(RealMatrixChangingVisitor visitor)
Row order starts at upper left and iterating through all elements of a row from left to right before going to the leftmost element of the next row.
walkInRowOrder
in interface RealMatrix
walkInRowOrder
in class AbstractRealMatrix
visitor
- visitor used to process all matrix entriesRealMatrixChangingVisitor.end()
at the end
of the walkRealMatrix.walkInRowOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor, int, int, int, int)
public double walkInRowOrder(RealMatrixPreservingVisitor visitor)
Row order starts at upper left and iterating through all elements of a row from left to right before going to the leftmost element of the next row.
walkInRowOrder
in interface RealMatrix
walkInRowOrder
in class AbstractRealMatrix
visitor
- visitor used to process all matrix entriesRealMatrixPreservingVisitor.end()
at the end
of the walkRealMatrix.walkInRowOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor, int, int, int, int)
public double walkInRowOrder(RealMatrixChangingVisitor visitor, int startRow, int endRow, int startColumn, int endColumn)
Row order starts at upper left and iterating through all elements of a row from left to right before going to the leftmost element of the next row.
walkInRowOrder
in interface RealMatrix
walkInRowOrder
in class AbstractRealMatrix
visitor
- visitor used to process all matrix entriesstartRow
- Initial row indexendRow
- Final row index (inclusive)startColumn
- Initial column indexendColumn
- Final column indexRealMatrixChangingVisitor.end()
at the end
of the walkRealMatrix.walkInRowOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor, int, int, int, int)
public double walkInRowOrder(RealMatrixPreservingVisitor visitor, int startRow, int endRow, int startColumn, int endColumn)
Row order starts at upper left and iterating through all elements of a row from left to right before going to the leftmost element of the next row.
walkInRowOrder
in interface RealMatrix
walkInRowOrder
in class AbstractRealMatrix
visitor
- visitor used to process all matrix entriesstartRow
- Initial row indexendRow
- Final row index (inclusive)startColumn
- Initial column indexendColumn
- Final column indexRealMatrixPreservingVisitor.end()
at the end
of the walkRealMatrix.walkInRowOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor, int, int, int, int)
public double walkInOptimizedOrder(RealMatrixChangingVisitor visitor)
The fastest walking order depends on the exact matrix class. It may be different from traditional row or column orders.
walkInOptimizedOrder
in interface RealMatrix
walkInOptimizedOrder
in class AbstractRealMatrix
visitor
- visitor used to process all matrix entriesRealMatrixChangingVisitor.end()
at the end
of the walkRealMatrix.walkInRowOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor, int, int, int, int)
public double walkInOptimizedOrder(RealMatrixPreservingVisitor visitor)
The fastest walking order depends on the exact matrix class. It may be different from traditional row or column orders.
walkInOptimizedOrder
in interface RealMatrix
walkInOptimizedOrder
in class AbstractRealMatrix
visitor
- visitor used to process all matrix entriesRealMatrixPreservingVisitor.end()
at the end
of the walkRealMatrix.walkInRowOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor, int, int, int, int)
public double walkInOptimizedOrder(RealMatrixChangingVisitor visitor, int startRow, int endRow, int startColumn, int endColumn)
The fastest walking order depends on the exact matrix class. It may be different from traditional row or column orders.
walkInOptimizedOrder
in interface RealMatrix
walkInOptimizedOrder
in class AbstractRealMatrix
visitor
- visitor used to process all matrix entriesstartRow
- Initial row indexendRow
- Final row index (inclusive)startColumn
- Initial column indexendColumn
- Final column index (inclusive)RealMatrixChangingVisitor.end()
at the end
of the walkRealMatrix.walkInRowOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor, int, int, int, int)
public double walkInOptimizedOrder(RealMatrixPreservingVisitor visitor, int startRow, int endRow, int startColumn, int endColumn)
The fastest walking order depends on the exact matrix class. It may be different from traditional row or column orders.
walkInOptimizedOrder
in interface RealMatrix
walkInOptimizedOrder
in class AbstractRealMatrix
visitor
- visitor used to process all matrix entriesstartRow
- Initial row indexendRow
- Final row index (inclusive)startColumn
- Initial column indexendColumn
- Final column index (inclusive)RealMatrixPreservingVisitor.end()
at the end
of the walkRealMatrix.walkInRowOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInRowOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor, int, int, int, int)
,
RealMatrix.walkInColumnOrder(RealMatrixPreservingVisitor, int, int, int, int)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor)
,
RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor, int, int, int, int)
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