Array2DRowRealMatrix (Apache Commons Math 3.6.1 API)

java.lang.Object
- org.apache.commons.math3.linear.RealLinearOperator
- - org.apache.commons.math3.linear.AbstractRealMatrix
  - - org.apache.commons.math3.linear.Array2DRowRealMatrix

All Implemented Interfaces:

Serializable, AnyMatrix, RealMatrix
```
public class Array2DRowRealMatrix
extends AbstractRealMatrix
implements Serializable
```
Implementation of RealMatrix using a double[][] array to store entries.

See Also:
Serialized Form

Constructor Summary

Constructors
Constructor and 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 created matrix.
`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

Methods
Modifier and Type	Method and Description
`Array2DRowRealMatrix`	`add(Array2DRowRealMatrix m)` Compute the sum of `this` and `m`.
`void`	`addToEntry(int row, int column, double increment)` Adds (in place) the specified value to the specified entry of `this` matrix.
`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 of this matrix.
`double[][]`	`getData()` Returns matrix entries as a two-dimensional array.
`double[][]`	`getDataRef()` Get a reference to the underlying data array.
`double`	`getEntry(int row, int column)` Get the entry in the specified row and column.
`int`	`getRowDimension()` Returns the number of rows of this matrix.
`Array2DRowRealMatrix`	`multiply(Array2DRowRealMatrix m)` Returns the result of postmultiplying `this` by `m`.
`void`	`multiplyEntry(int row, int column, double factor)` Multiplies (in place) the specified entry of `this` matrix by the specified value.
`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)` Returns `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.math3.linear.AbstractRealMatrix
add, copySubMatrix, copySubMatrix, equals, getColumn, getColumnMatrix, getColumnVector, getFrobeniusNorm, getNorm, getRow, getRowMatrix, getRowVector, getSubMatrix, getSubMatrix, getTrace, hashCode, isSquare, multiply, operate, power, preMultiply, preMultiply, scalarAdd, scalarMultiply, setColumn, setColumnMatrix, setColumnVector, setRow, setRowMatrix, setRowVector, subtract, toString, transpose, walkInOptimizedOrder, walkInOptimizedOrder, walkInOptimizedOrder, walkInOptimizedOrder

Methods inherited from class org.apache.commons.math3.linear.RealLinearOperator
isTransposable, operateTranspose

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

- Constructor Detail
  - Array2DRowRealMatrix
```
public Array2DRowRealMatrix()
```
    Creates a matrix with no data
  - Array2DRowRealMatrix
```
public Array2DRowRealMatrix(int rowDimension,
                    int columnDimension)
                     throws NotStrictlyPositiveException
```
    Create a new RealMatrix with the supplied row and column dimensions.
    
    Parameters:
    rowDimension - Number of rows in the new matrix.
    columnDimension - Number of columns in the new matrix.
    
    Throws:
    
    NotStrictlyPositiveException - if the row or column dimension is not positive.
  - Array2DRowRealMatrix
```
public Array2DRowRealMatrix(double[][] d)
                     throws DimensionMismatchException,
                            NoDataException,
                            NullArgumentException
```
    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 the new matrix.
    
    Throws:
    
    DimensionMismatchException - if d is not rectangular.
    
    NoDataException - if d row or column dimension is zero.
    
    NullArgumentException - if d is null.
    See Also:
    Array2DRowRealMatrix(double[][], boolean)
  - Array2DRowRealMatrix
```
public Array2DRowRealMatrix(double[][] d,
                    boolean copyArray)
                     throws DimensionMismatchException,
                            NoDataException,
                            NullArgumentException
```
    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. This will prevent the copying and improve performance as no new array will be built and no data will be copied.
    
    Parameters:
    d - Data for new matrix.
    copyArray - if true, the input array will be copied, otherwise it will be referenced.
    
    Throws:
    
    DimensionMismatchException - if d is not rectangular.
    
    NoDataException - if d row or column dimension is zero.
    
    NullArgumentException - 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 created matrix. The input array is copied.
    
    Parameters:
    v - Column vector holding data for new matrix.
- Method Detail
  - createMatrix
```
public RealMatrix createMatrix(int rowDimension,
                      int columnDimension)
                        throws NotStrictlyPositiveException
```
    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:
    
    NotStrictlyPositiveException - 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 Array2DRowRealMatrix add(Array2DRowRealMatrix m)
                         throws MatrixDimensionMismatchException
```
    Compute the sum of this and m.
    
    Parameters:
    m - Matrix to be added.
    
    Returns:
    this + m.
    
    Throws:
    
    MatrixDimensionMismatchException - if m is not the same size as this.
  - subtract
```
public Array2DRowRealMatrix subtract(Array2DRowRealMatrix m)
                              throws MatrixDimensionMismatchException
```
    Returns this minus m.
    
    Parameters:
    m - Matrix to be subtracted.
    
    Returns:
    this - m
    
    Throws:
    
    MatrixDimensionMismatchException - if m is not the same size as this.
  - multiply
```
public Array2DRowRealMatrix multiply(Array2DRowRealMatrix m)
                              throws DimensionMismatchException
```
    Returns the result of postmultiplying this by m.
    
    Parameters:
    m - matrix to postmultiply by
    
    Returns:
    this * m
    
    Throws:
    
    DimensionMismatchException - 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()
```
    Get a reference to the underlying data array.
    
    Returns:
    2-dimensional array of entries.
  - setSubMatrix
```
public void setSubMatrix(double[][] subMatrix,
                int row,
                int column)
                  throws NoDataException,
                         OutOfRangeException,
                         DimensionMismatchException,
                         NullArgumentException
```
    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:
    
    NoDataException - if subMatrix is empty.
    
    OutOfRangeException - if subMatrix does not fit into this matrix from element in (row, column).
    
    DimensionMismatchException - if subMatrix is not rectangular (not all rows have the same length) or empty.
    
    NullArgumentException - if subMatrix is null.
  - getEntry
```
public double getEntry(int row,
              int column)
                throws OutOfRangeException
```
    Get the entry in the specified row and column. Row and column indices start at 0.
    
    Specified by:
    
    getEntry in interface RealMatrix
    
    Specified by:
    
    getEntry in class AbstractRealMatrix
    
    Parameters:
    row - Row index of entry to be fetched.
    column - Column index of entry to be fetched.
    
    Returns:
    the matrix entry at (row, column).
    
    Throws:
    
    OutOfRangeException - if the row or column index is not valid.
  - setEntry
```
public void setEntry(int row,
            int column,
            double value)
              throws OutOfRangeException
```
    Set the entry in the specified row and column. Row and column indices start at 0.
    
    Specified by:
    
    setEntry in interface RealMatrix
    
    Specified by:
    
    setEntry in class AbstractRealMatrix
    
    Parameters:
    row - Row index of entry to be set.
    column - Column index of entry to be set.
    value - the new value of the entry.
    
    Throws:
    
    OutOfRangeException - if the row or column index is not valid
  - addToEntry
```
public void addToEntry(int row,
              int column,
              double increment)
                throws OutOfRangeException
```
    Adds (in place) the specified value to the specified entry of this matrix. Row and column indices start at 0.
    
    Specified by:
    
    addToEntry in interface RealMatrix
    
    Overrides:
    
    addToEntry in class AbstractRealMatrix
    
    Parameters:
    row - Row index of the entry to be modified.
    column - Column index of the entry to be modified.
    increment - value to add to the matrix entry.
    
    Throws:
    
    OutOfRangeException - if the row or column index is not valid.
  - multiplyEntry
```
public void multiplyEntry(int row,
                 int column,
                 double factor)
                   throws OutOfRangeException
```
    Multiplies (in place) the specified entry of this matrix by the specified value. Row and column indices start at 0.
    
    Specified by:
    
    multiplyEntry in interface RealMatrix
    
    Overrides:
    
    multiplyEntry in class AbstractRealMatrix
    
    Parameters:
    row - Row index of the entry to be modified.
    column - Column index of the entry to be modified.
    factor - Multiplication factor for the matrix entry.
    
    Throws:
    
    OutOfRangeException - if the row or column index is not valid.
  - getRowDimension
```
public int getRowDimension()
```
    Returns the number of rows of this matrix.
    
    Specified by:
    
    getRowDimension in interface AnyMatrix
    
    Specified by:
    
    getRowDimension in class AbstractRealMatrix
    
    Returns:
    the number of rows.
  - getColumnDimension
```
public int getColumnDimension()
```
    Returns the number of columns of this matrix.
    
    Specified by:
    
    getColumnDimension in interface AnyMatrix
    
    Specified by:
    
    getColumnDimension in class AbstractRealMatrix
    
    Returns:
    the number of columns.
  - operate
```
public double[] operate(double[] v)
                 throws DimensionMismatchException
```
    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:
    
    DimensionMismatchException - if the length of v does not match the column dimension of this.
  - preMultiply
```
public double[] preMultiply(double[] v)
                     throws DimensionMismatchException
```
    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:
    
    DimensionMismatchException - if the length of v does not match the row dimension of this.
  - walkInRowOrder
```
public double walkInRowOrder(RealMatrixChangingVisitor visitor)
```
    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
    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)
```
    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
    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 OutOfRangeException,
                             NumberIsTooSmallException
```
    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:
    
    OutOfRangeException - if the indices are not valid.
    
    NumberIsTooSmallException - if endRow < startRow or endColumn < startColumn.
    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 OutOfRangeException,
                             NumberIsTooSmallException
```
    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:
    
    OutOfRangeException - if the indices are not valid.
    
    NumberIsTooSmallException - if endRow < startRow or endColumn < startColumn.
    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)
```
    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
    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)
```
    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
    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 OutOfRangeException,
                                NumberIsTooSmallException
```
    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:
    
    OutOfRangeException - if the indices are not valid.
    
    NumberIsTooSmallException - if endRow < startRow or endColumn < startColumn.
    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 OutOfRangeException,
                                NumberIsTooSmallException
```
    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:
    
    OutOfRangeException - if the indices are not valid.
    
    NumberIsTooSmallException - if endRow < startRow or endColumn < startColumn.
    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

Constructor Summary

Method Summary

Methods inherited from class org.apache.commons.math3.linear.AbstractRealMatrix

Methods inherited from class org.apache.commons.math3.linear.RealLinearOperator

Methods inherited from class java.lang.Object

Constructor Detail

Array2DRowRealMatrix

Array2DRowRealMatrix

Array2DRowRealMatrix

Array2DRowRealMatrix

Array2DRowRealMatrix

Method Detail

createMatrix

copy

add

subtract

multiply

getData

getDataRef

setSubMatrix

getEntry

setEntry

addToEntry

multiplyEntry

getRowDimension

getColumnDimension

operate

preMultiply

walkInRowOrder

walkInRowOrder

walkInRowOrder

walkInRowOrder

walkInColumnOrder

walkInColumnOrder

walkInColumnOrder

walkInColumnOrder