java.lang.Object
- org.apache.commons.math.linear.AbstractRealMatrix
- - org.apache.commons.math.linear.Array2DRowRealMatrix

All Implemented Interfaces:

java.io.Serializable, AnyMatrix, RealMatrix
```
public class Array2DRowRealMatrix
extends AbstractRealMatrix
implements java.io.Serializable
```
Implementation of RealMatrix using a double[][] array to store entries and LU decomposition to support linear system solution and inverse.
The LU decomposition is performed as needed, to support the following operations:
- solve
- isSingular
- getDeterminant
- inverse
Usage notes:
- The LU decomposition is cached and reused on subsequent calls. If data are modified via references to the underlying array obtained using getDataRef(), then the stored LU decomposition will not be discarded. In this case, you need to explicitly invoke LUDecompose() to recompute the decomposition before using any of the methods above.
- As specified in the RealMatrix interface, matrix element indexing is 0-based -- e.g., getEntry(0, 0) returns the element in the first row, first column of the matrix.
Version:

$Revision: 1073158 $ $Date: 2011-02-21 22:46:52 +0100 (lun. 21 févr. 2011) $

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

protected double[][] data
Entries of the matrix

Constructor Summary

Constructors
Constructor	Description
`Array2DRowRealMatrix()`	Creates a matrix with no data
`Array2DRowRealMatrix(double[] v)`	Create a new (column) RealMatrix using `v` as the data for the unique column of the `v.length x 1` matrix created.
`Array2DRowRealMatrix(double[][] d)`	Create a new RealMatrix using the input array as the underlying data array.
`Array2DRowRealMatrix(double[][] d, boolean copyArray)`	Create a new RealMatrix using the input array as the underlying data array.
`Array2DRowRealMatrix(int rowDimension, int columnDimension)`	Create a new RealMatrix with the supplied row and column dimensions.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Array2DRowRealMatrix`	`add(Array2DRowRealMatrix m)`	Compute the sum of this and `m`.
`RealMatrix`	`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.
`RealMatrix`	`copy()`	Returns a (deep) copy of this.
`RealMatrix`	`createMatrix(int rowDimension, int columnDimension)`	Create a new RealMatrix of the same type as the instance with the supplied row and column dimensions.
`int`	`getColumnDimension()`	Returns the number of columns in the matrix.
`double[][]`	`getData()`	Returns matrix entries as a two-dimensional array.
`double[][]`	`getDataRef()`	Returns a reference to the underlying data array.
`double`	`getEntry(int row, int column)`	Returns the entry in the specified row and column.
`int`	`getRowDimension()`	Returns the number of rows in the matrix.
`Array2DRowRealMatrix`	`multiply(Array2DRowRealMatrix m)`	Returns the result of postmultiplying this by `m`.
`RealMatrix`	`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`.
`void`	`setEntry(int row, int column, double value)`	Set the entry in the specified row and column.
`void`	`setSubMatrix(double[][] subMatrix, int row, int column)`	Replace the submatrix starting at `row, column` using data in the input `subMatrix` array.
`Array2DRowRealMatrix`	`subtract(Array2DRowRealMatrix m)`	Compute this minus `m`.
`RealMatrix`	`subtract(RealMatrix m)`	Compute this minus m.
`double`	`walkInColumnOrder(RealMatrixChangingVisitor visitor)`	Visit (and possibly change) all matrix entries in column order.
`double`	`walkInColumnOrder(RealMatrixChangingVisitor visitor, int startRow, int endRow, int startColumn, int endColumn)`	Visit (and possibly change) some matrix entries in column order.
`double`	`walkInColumnOrder(RealMatrixPreservingVisitor visitor)`	Visit (but don't change) all matrix entries in column order.
`double`	`walkInColumnOrder(RealMatrixPreservingVisitor visitor, int startRow, int endRow, int startColumn, int endColumn)`	Visit (but don't change) some matrix entries in column 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.

Methods inherited from class org.apache.commons.math.linear.AbstractRealMatrix
copySubMatrix, copySubMatrix, equals, getColumn, getColumnMatrix, getColumnVector, getDeterminant, getFrobeniusNorm, getNorm, getRow, getRowMatrix, getRowVector, getSubMatrix, getSubMatrix, getTrace, hashCode, inverse, isSingular, isSquare, luDecompose, operate, preMultiply, preMultiply, scalarAdd, scalarMultiply, setColumn, setColumnMatrix, setColumnVector, setRow, setRowMatrix, setRowVector, solve, solve, toString, transpose, walkInOptimizedOrder, walkInOptimizedOrder, walkInOptimizedOrder, walkInOptimizedOrder

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - data
```
protected double[][] data
```
    Entries of the matrix
- Constructor Detail
  - Array2DRowRealMatrix
```
public Array2DRowRealMatrix()
```
    Creates a matrix with no data
  - Array2DRowRealMatrix
```
public Array2DRowRealMatrix(int rowDimension,
                            int columnDimension)
                     throws java.lang.IllegalArgumentException
```
    Create a new RealMatrix with the supplied row and column dimensions.
    
    Parameters:
    
    rowDimension - the number of rows in the new matrix
    
    columnDimension - the number of columns in the new matrix
    
    Throws:
    
    java.lang.IllegalArgumentException - if row or column dimension is not positive
  - Array2DRowRealMatrix
```
public Array2DRowRealMatrix(double[][] d)
                     throws java.lang.IllegalArgumentException,
                            java.lang.NullPointerException
```
    Create a new RealMatrix using the input array as the underlying data array.
    The input array is copied, not referenced. This constructor has the same effect as calling Array2DRowRealMatrix(double[][], boolean) with the second argument set to true.
    
    Parameters:
    
    d - data for new matrix
    
    Throws:
    
    java.lang.IllegalArgumentException - if d is not rectangular (not all rows have the same length) or empty
    
    java.lang.NullPointerException - if d is null
    
    See Also:
    
    Array2DRowRealMatrix(double[][], boolean)
  - Array2DRowRealMatrix
```
public Array2DRowRealMatrix(double[][] d,
                            boolean copyArray)
                     throws java.lang.IllegalArgumentException,
                            java.lang.NullPointerException
```
    Create a new RealMatrix using the input array as the underlying data array.
    If an array is built specially in order to be embedded in a RealMatrix and not used directly, the copyArray may be set to false
    Parameters: d - data for new matrix copyArray - if true, the input array will be copied, otherwise it will be referenced Throws: java.lang.IllegalArgumentException - if d is not rectangular (not all rows have the same length) or empty java.lang.NullPointerException - if d is null See Also: Array2DRowRealMatrix(double[][])
  Array2DRowRealMatrix public Array2DRowRealMatrix(double[] v) Create a new (column) RealMatrix using v as the data for the unique column of the v.length x 1 matrix created. The input array is copied, not referenced. Parameters: v - column vector holding data for new matrix
Method Detail createMatrix public RealMatrix createMatrix(int rowDimension, int columnDimension) throws java.lang.IllegalArgumentException Create a new RealMatrix of the same type as the instance with the supplied row and column dimensions. Specified by: createMatrix in interface RealMatrix Specified by: createMatrix in class AbstractRealMatrix Parameters: rowDimension - the number of rows in the new matrix columnDimension - the number of columns in the new matrix Returns: a new matrix of the same type as the instance Throws: java.lang.IllegalArgumentException - if row or column dimension is not positive copy public RealMatrix copy() Returns a (deep) copy of this. Specified by: copy in interface RealMatrix Specified by: copy in class AbstractRealMatrix Returns: matrix copy add public RealMatrix add(RealMatrix m) throws java.lang.IllegalArgumentException Compute the sum of this and m. Specified by: add in interface RealMatrix Overrides: add in class AbstractRealMatrix Parameters: m - matrix to be added Returns: this + m Throws: java.lang.IllegalArgumentException - if m is not the same size as this add public Array2DRowRealMatrix add(Array2DRowRealMatrix m) throws java.lang.IllegalArgumentException Compute the sum of this and m. Parameters: m - matrix to be added Returns: this + m Throws: java.lang.IllegalArgumentException - if m is not the same size as this subtract public RealMatrix subtract(RealMatrix m) throws java.lang.IllegalArgumentException Compute this minus m. Specified by: subtract in interface RealMatrix Overrides: subtract in class AbstractRealMatrix Parameters: m - matrix to be subtracted Returns: this - m Throws: java.lang.IllegalArgumentException - if m is not the same size as this subtract public Array2DRowRealMatrix subtract(Array2DRowRealMatrix m) throws java.lang.IllegalArgumentException Compute this minus m. Parameters: m - matrix to be subtracted Returns: this + m Throws: java.lang.IllegalArgumentException - if m is not the same size as this multiply public RealMatrix multiply(RealMatrix m) throws java.lang.IllegalArgumentException Returns the result of postmultiplying this by m. Specified by: multiply in interface RealMatrix Overrides: multiply in class AbstractRealMatrix Parameters: m - matrix to postmultiply by Returns: this * m Throws: java.lang.IllegalArgumentException - if columnDimension(this) != rowDimension(m) multiply public Array2DRowRealMatrix multiply(Array2DRowRealMatrix m) throws java.lang.IllegalArgumentException Returns the result of postmultiplying this by m. Parameters: m - matrix to postmultiply by Returns: this*m Throws: java.lang.IllegalArgumentException - if columnDimension(this) != rowDimension(m) getData public double[][] getData() Returns matrix entries as a two-dimensional array. Specified by: getData in interface RealMatrix Overrides: getData in class AbstractRealMatrix Returns: 2-dimensional array of entries getDataRef public double[][] getDataRef() Returns a reference to the underlying data array. Does not make a fresh copy of the underlying data. Returns: 2-dimensional array of entries setSubMatrix public void setSubMatrix(double[][] subMatrix, int row, int column) throws MatrixIndexException Replace the submatrix starting at 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 2 and 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 Specified by: setSubMatrix in interface RealMatrix Overrides: setSubMatrix in class AbstractRealMatrix Parameters: subMatrix - array containing the submatrix replacement data row - row coordinate of the top, left element to be replaced column - column coordinate of the top, left element to be replaced Throws: MatrixIndexException - if subMatrix does not fit into this matrix from element in (row, column) getEntry public double getEntry(int row, int column) throws MatrixIndexException Returns the entry in the specified row and column. Row and column indices start at 0 and must satisfy 0 <= row < rowDimension 0 <= column < columnDimension otherwise a MatrixIndexException is thrown. Specified by: getEntry in interface RealMatrix Specified by: getEntry in class AbstractRealMatrix Parameters: row - row location of entry to be fetched column - column location of entry to be fetched Returns: matrix entry in row,column Throws: MatrixIndexException - if the row or column index is not valid setEntry public void setEntry(int row, int column, double value) throws MatrixIndexException Set the entry in the specified row and column. Row and column indices start at 0 and must satisfy 0 <= row < rowDimension 0 <= column < columnDimension otherwise a MatrixIndexException is thrown. Specified by: setEntry in interface RealMatrix Specified by: setEntry in class AbstractRealMatrix Parameters: row - row location of entry to be set column - column location of entry to be set value - matrix entry to be set in row,column Throws: MatrixIndexException - if the row or column index is not valid addToEntry public void addToEntry(int row, int column, double increment) throws MatrixIndexException Change an entry in the specified row and column. Row and column indices start at 0 and must satisfy 0 <= row < rowDimension 0 <= column < columnDimension otherwise a MatrixIndexException is thrown. Specified by: addToEntry in interface RealMatrix Specified by: addToEntry in class AbstractRealMatrix Parameters: row - row location of entry to be set column - column location of entry to be set increment - value to add to the current matrix entry in row,column Throws: MatrixIndexException - if the row or column index is not valid multiplyEntry public void multiplyEntry(int row, int column, double factor) throws MatrixIndexException Change an entry in the specified row and column. Row and column indices start at 0 and must satisfy 0 <= row < rowDimension 0 <= column < columnDimension otherwise a MatrixIndexException is thrown. Specified by: multiplyEntry in interface RealMatrix Specified by: multiplyEntry in class AbstractRealMatrix Parameters: row - row location of entry to be set column - column location of entry to be set factor - multiplication factor for the current matrix entry in row,column Throws: MatrixIndexException - if the row or column index is not valid getRowDimension public int getRowDimension() Returns the number of rows in the matrix. Specified by: getRowDimension in interface AnyMatrix Specified by: getRowDimension in class AbstractRealMatrix Returns: rowDimension getColumnDimension public int getColumnDimension() Returns the number of columns in the matrix. Specified by: getColumnDimension in interface AnyMatrix Specified by: getColumnDimension in class AbstractRealMatrix Returns: columnDimension operate public double[] operate(double[] v) throws java.lang.IllegalArgumentException Returns the result of multiplying this by the vector v. Specified by: operate in interface RealMatrix Overrides: operate in class AbstractRealMatrix Parameters: v - the vector to operate on Returns: this*v Throws: java.lang.IllegalArgumentException - if columnDimension != v.size() preMultiply public double[] preMultiply(double[] v) throws java.lang.IllegalArgumentException Returns the (row) vector result of premultiplying this by the vector v. Specified by: preMultiply in interface RealMatrix Overrides: preMultiply in class AbstractRealMatrix Parameters: v - the row vector to premultiply by Returns: v*this Throws: java.lang.IllegalArgumentException - if rowDimension != v.size() walkInRowOrder public double walkInRowOrder(RealMatrixChangingVisitor visitor) throws MatrixVisitorException Visit (and possibly change) all matrix entries in row order. 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. Specified by: walkInRowOrder in interface RealMatrix Overrides: walkInRowOrder in class AbstractRealMatrix Parameters: visitor - visitor used to process all matrix entries Returns: the value returned by RealMatrixChangingVisitor.end() at the end of the walk Throws: MatrixVisitorException - if the visitor cannot process an entry See Also: 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), RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor, int, int, int, int) walkInRowOrder public double walkInRowOrder(RealMatrixPreservingVisitor visitor) throws MatrixVisitorException Visit (but don't change) all matrix entries in row order. 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. Specified by: walkInRowOrder in interface RealMatrix Overrides: walkInRowOrder in class AbstractRealMatrix Parameters: visitor - visitor used to process all matrix entries Returns: the value returned by RealMatrixPreservingVisitor.end() at the end of the walk Throws: MatrixVisitorException - if the visitor cannot process an entry See Also: RealMatrix.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) walkInRowOrder public double walkInRowOrder(RealMatrixChangingVisitor visitor, int startRow, int endRow, int startColumn, int endColumn) throws MatrixIndexException, MatrixVisitorException Visit (and possibly change) some matrix entries in row order. 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. Specified by: walkInRowOrder in interface RealMatrix Overrides: walkInRowOrder in class AbstractRealMatrix Parameters: visitor - visitor used to process all matrix entries startRow - Initial row index endRow - Final row index (inclusive) startColumn - Initial column index endColumn - Final column index Returns: the value returned by RealMatrixChangingVisitor.end() at the end of the walk Throws: MatrixIndexException - if the indices are not valid MatrixVisitorException - if the visitor cannot process an entry See Also: RealMatrix.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) walkInRowOrder public double walkInRowOrder(RealMatrixPreservingVisitor visitor, int startRow, int endRow, int startColumn, int endColumn) throws MatrixIndexException, MatrixVisitorException Visit (but don't change) some matrix entries in row order. 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. Specified by: walkInRowOrder in interface RealMatrix Overrides: walkInRowOrder in class AbstractRealMatrix Parameters: visitor - visitor used to process all matrix entries startRow - Initial row index endRow - Final row index (inclusive) startColumn - Initial column index endColumn - Final column index Returns: the value returned by RealMatrixPreservingVisitor.end() at the end of the walk Throws: MatrixIndexException - if the indices are not valid MatrixVisitorException - if the visitor cannot process an entry See Also: RealMatrix.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) walkInColumnOrder public double walkInColumnOrder(RealMatrixChangingVisitor visitor) throws MatrixVisitorException Visit (and possibly change) all matrix entries in column order. Column order starts at upper left and iterating through all elements of a column from top to bottom before going to the topmost element of the next column. Specified by: walkInColumnOrder in interface RealMatrix Overrides: walkInColumnOrder in class AbstractRealMatrix Parameters: visitor - visitor used to process all matrix entries Returns: the value returned by RealMatrixChangingVisitor.end() at the end of the walk Throws: MatrixVisitorException - if the visitor cannot process an entry See Also: RealMatrix.walkInRowOrder(RealMatrixChangingVisitor), RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor), RealMatrix.walkInRowOrder(RealMatrixChangingVisitor, int, int, int, int), RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor, int, int, int, int), 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) walkInColumnOrder public double walkInColumnOrder(RealMatrixPreservingVisitor visitor) throws MatrixVisitorException Visit (but don't change) all matrix entries in column order. Column order starts at upper left and iterating through all elements of a column from top to bottom before going to the topmost element of the next column. Specified by: walkInColumnOrder in interface RealMatrix Overrides: walkInColumnOrder in class AbstractRealMatrix Parameters: visitor - visitor used to process all matrix entries Returns: the value returned by RealMatrixPreservingVisitor.end() at the end of the walk Throws: MatrixVisitorException - if the visitor cannot process an entry See Also: RealMatrix.walkInRowOrder(RealMatrixChangingVisitor), RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor), RealMatrix.walkInRowOrder(RealMatrixChangingVisitor, int, int, int, int), RealMatrix.walkInRowOrder(RealMatrixPreservingVisitor, int, int, int, int), RealMatrix.walkInColumnOrder(RealMatrixChangingVisitor), 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) walkInColumnOrder public double walkInColumnOrder(RealMatrixChangingVisitor visitor, int startRow, int endRow, int startColumn, int endColumn) throws MatrixIndexException, MatrixVisitorException Visit (and possibly change) some matrix entries in column order. Column order starts at upper left and iterating through all elements of a column from top to bottom before going to the topmost element of the next column. Specified by: walkInColumnOrder in interface RealMatrix Overrides: walkInColumnOrder in class AbstractRealMatrix Parameters: visitor - visitor used to process all matrix entries startRow - Initial row index endRow - Final row index (inclusive) startColumn - Initial column index endColumn - Final column index Returns: the value returned by RealMatrixChangingVisitor.end() at the end of the walk Throws: MatrixIndexException - if the indices are not valid MatrixVisitorException - if the visitor cannot process an entry See Also: RealMatrix.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(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) walkInColumnOrder public double walkInColumnOrder(RealMatrixPreservingVisitor visitor, int startRow, int endRow, int startColumn, int endColumn) throws MatrixIndexException, MatrixVisitorException Visit (but don't change) some matrix entries in column order. Column order starts at upper left and iterating through all elements of a column from top to bottom before going to the topmost element of the next column. Specified by: walkInColumnOrder in interface RealMatrix Overrides: walkInColumnOrder in class AbstractRealMatrix Parameters: visitor - visitor used to process all matrix entries startRow - Initial row index endRow - Final row index (inclusive) startColumn - Initial column index endColumn - Final column index Returns: the value returned by RealMatrixPreservingVisitor.end() at the end of the walk Throws: MatrixIndexException - if the indices are not valid MatrixVisitorException - if the visitor cannot process an entry See Also: RealMatrix.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.walkInOptimizedOrder(RealMatrixChangingVisitor), RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor), RealMatrix.walkInOptimizedOrder(RealMatrixChangingVisitor, int, int, int, int), RealMatrix.walkInOptimizedOrder(RealMatrixPreservingVisitor, int, int, int, int)

Class Array2DRowRealMatrix

Field Summary

Constructor Summary

Method Summary

Methods inherited from class org.apache.commons.math.linear.AbstractRealMatrix

Methods inherited from class java.lang.Object

Field Detail

data

Constructor Detail

Array2DRowRealMatrix

Array2DRowRealMatrix

Array2DRowRealMatrix

Array2DRowRealMatrix

Array2DRowRealMatrix

Method Detail

createMatrix

copy

add

add

subtract

subtract

multiply

multiply

getData

getDataRef

setSubMatrix

getEntry

setEntry

addToEntry

multiplyEntry

getRowDimension

getColumnDimension

operate

preMultiply

walkInRowOrder

walkInRowOrder

walkInRowOrder

walkInRowOrder

walkInColumnOrder

walkInColumnOrder

walkInColumnOrder

walkInColumnOrder