Package org.apache.commons.math.linear

Class AbstractFieldMatrix<T extends FieldElement<T>>

java.lang.Object

org.apache.commons.math.linear.AbstractFieldMatrix<T>

Type Parameters:

T - the type of the field elements

All Implemented Interfaces:

AnyMatrix, FieldMatrix<T>

Direct Known Subclasses:

Array2DRowFieldMatrix, BlockFieldMatrix, SparseFieldMatrix

public abstract class AbstractFieldMatrix<T extends FieldElement<T>>
extends java.lang.Object
implements FieldMatrix<T>

Basic implementation of FieldMatrix methods regardless of the underlying storage.

All the methods implemented here use getEntry(int, int) to access matrix elements. Derived class can provide faster implementations.

Since:

2.0

Version:

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

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractFieldMatrix()	Constructor for use with Serializable
protected	AbstractFieldMatrix(Field<T> field)	Creates a matrix with no data
protected	AbstractFieldMatrix(Field<T> field, int rowDimension, int columnDimension)	Create a new FieldMatrix with the supplied row and column dimensions.

Method Summary

Modifier and Type	Method	Description
FieldMatrix<T>	add(FieldMatrix<T> m)	Compute the sum of this and m.
abstract void	addToEntry(int row, int column, T increment)	Change an entry in the specified row and column.
protected static <T extends FieldElement<T>> T[]	buildArray(Field<T> field, int length)	Build an array of elements.
protected static <T extends FieldElement<T>> T[][]	buildArray(Field<T> field, int rows, int columns)	Build an array of elements.
protected void	checkAdditionCompatible(FieldMatrix<T> m)	Check if a matrix is addition compatible with the instance
protected void	checkColumnIndex(int column)	Check if a column index is valid.
protected void	checkMultiplicationCompatible(FieldMatrix<T> m)	Check if a matrix is multiplication compatible with the instance
protected void	checkRowIndex(int row)	Check if a row index is valid.
protected void	checkSubMatrixIndex(int[] selectedRows, int[] selectedColumns)	Check if submatrix ranges indices are valid.
protected void	checkSubMatrixIndex(int startRow, int endRow, int startColumn, int endColumn)	Check if submatrix ranges indices are valid.
protected void	checkSubtractionCompatible(FieldMatrix<T> m)	Check if a matrix is subtraction compatible with the instance
abstract FieldMatrix<T>	copy()	Returns a (deep) copy of this.
void	copySubMatrix(int[] selectedRows, int[] selectedColumns, T[][] destination)	Copy a submatrix.
void	copySubMatrix(int startRow, int endRow, int startColumn, int endColumn, T[][] destination)	Copy a submatrix.
abstract FieldMatrix<T>	createMatrix(int rowDimension, int columnDimension)	Create a new FieldMatrix of the same type as the instance with the supplied row and column dimensions.
boolean	equals(java.lang.Object object)	Returns true iff object is a FieldMatrix instance with the same dimensions as this and all corresponding matrix entries are equal.
protected static <T extends FieldElement<T>> Field<T>	extractField(T[] d)	Get the elements type from an array.
protected static <T extends FieldElement<T>> Field<T>	extractField(T[][] d)	Get the elements type from an array.
T[]	getColumn(int column)	Returns the entries in column number col as an array.
abstract int	getColumnDimension()	Returns the number of columns in the matrix.
FieldMatrix<T>	getColumnMatrix(int column)	Returns the entries in column number column as a column matrix.
FieldVector<T>	getColumnVector(int column)	Returns the entries in column number column as a vector.
T[][]	getData()	Returns matrix entries as a two-dimensional array.
abstract T	getEntry(int row, int column)	Returns the entry in the specified row and column.
Field<T>	getField()	Get the type of field elements of the matrix.
T[]	getRow(int row)	Returns the entries in row number row as an array.
abstract int	getRowDimension()	Returns the number of rows in the matrix.
FieldMatrix<T>	getRowMatrix(int row)	Returns the entries in row number row as a row matrix.
FieldVector<T>	getRowVector(int row)	Returns the entries in row number row as a vector.
FieldMatrix<T>	getSubMatrix(int[] selectedRows, int[] selectedColumns)	Gets a submatrix.
FieldMatrix<T>	getSubMatrix(int startRow, int endRow, int startColumn, int endColumn)	Gets a submatrix.
T	getTrace()	Returns the trace of the matrix (the sum of the elements on the main diagonal).
int	hashCode()	Computes a hashcode for the matrix.
boolean	isSquare()	Is this a square matrix?
FieldMatrix<T>	multiply(FieldMatrix<T> m)	Returns the result of postmultiplying this by m.
abstract void	multiplyEntry(int row, int column, T factor)	Change an entry in the specified row and column.
FieldVector<T>	operate(FieldVector<T> v)	Returns the result of multiplying this by the vector v.
T[]	operate(T[] v)	Returns the result of multiplying this by the vector v.
FieldMatrix<T>	preMultiply(FieldMatrix<T> m)	Returns the result premultiplying this by m.
FieldVector<T>	preMultiply(FieldVector<T> v)	Returns the (row) vector result of premultiplying this by the vector v.
T[]	preMultiply(T[] v)	Returns the (row) vector result of premultiplying this by the vector v.
FieldMatrix<T>	scalarAdd(T d)	Returns the result of adding d to each entry of this.
FieldMatrix<T>	scalarMultiply(T d)	Returns the result multiplying each entry of this by d.
void	setColumn(int column, T[] array)	Sets the entries in column number column as a column matrix.
void	setColumnMatrix(int column, FieldMatrix<T> matrix)	Sets the entries in column number column as a column matrix.
void	setColumnVector(int column, FieldVector<T> vector)	Sets the entries in column number column as a vector.
abstract void	setEntry(int row, int column, T value)	Set the entry in the specified row and column.
void	setRow(int row, T[] array)	Sets the entries in row number row as a row matrix.
void	setRowMatrix(int row, FieldMatrix<T> matrix)	Sets the entries in row number row as a row matrix.
void	setRowVector(int row, FieldVector<T> vector)	Sets the entries in row number row as a vector.
void	setSubMatrix(T[][] subMatrix, int row, int column)	Replace the submatrix starting at row, column using data in the input subMatrix array.
FieldMatrix<T>	subtract(FieldMatrix<T> m)	Compute this minus m.
java.lang.String	toString()	Get a string representation for this matrix.
FieldMatrix<T>	transpose()	Returns the transpose of this matrix.
T	walkInColumnOrder(FieldMatrixChangingVisitor<T> visitor)	Visit (and possibly change) all matrix entries in column order.
T	walkInColumnOrder(FieldMatrixChangingVisitor<T> visitor, int startRow, int endRow, int startColumn, int endColumn)	Visit (and possibly change) some matrix entries in column order.
T	walkInColumnOrder(FieldMatrixPreservingVisitor<T> visitor)	Visit (but don't change) all matrix entries in column order.
T	walkInColumnOrder(FieldMatrixPreservingVisitor<T> visitor, int startRow, int endRow, int startColumn, int endColumn)	Visit (but don't change) some matrix entries in column order.
T	walkInOptimizedOrder(FieldMatrixChangingVisitor<T> visitor)	Visit (and possibly change) all matrix entries using the fastest possible order.
T	walkInOptimizedOrder(FieldMatrixChangingVisitor<T> visitor, int startRow, int endRow, int startColumn, int endColumn)	Visit (and possibly change) some matrix entries using the fastest possible order.
T	walkInOptimizedOrder(FieldMatrixPreservingVisitor<T> visitor)	Visit (but don't change) all matrix entries using the fastest possible order.
T	walkInOptimizedOrder(FieldMatrixPreservingVisitor<T> visitor, int startRow, int endRow, int startColumn, int endColumn)	Visit (but don't change) some matrix entries using the fastest possible order.
T	walkInRowOrder(FieldMatrixChangingVisitor<T> visitor)	Visit (and possibly change) all matrix entries in row order.
T	walkInRowOrder(FieldMatrixChangingVisitor<T> visitor, int startRow, int endRow, int startColumn, int endColumn)	Visit (and possibly change) some matrix entries in row order.
T	walkInRowOrder(FieldMatrixPreservingVisitor<T> visitor)	Visit (but don't change) all matrix entries in row order.
T	walkInRowOrder(FieldMatrixPreservingVisitor<T> visitor, int startRow, int endRow, int startColumn, int endColumn)	Visit (but don't change) some matrix entries in row order.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

AbstractFieldMatrix

protected AbstractFieldMatrix()

Constructor for use with Serializable

AbstractFieldMatrix

protected AbstractFieldMatrix(Field<T> field)

Creates a matrix with no data

Parameters:

field - field to which the elements belong

AbstractFieldMatrix

protected AbstractFieldMatrix(Field<T> field,
                              int rowDimension,
                              int columnDimension)
                       throws java.lang.IllegalArgumentException

Create a new FieldMatrix with the supplied row and column dimensions.

Parameters:

field - field to which the elements belong

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

Method Detail

extractField

protected static <T extends FieldElement<T>> Field<T> extractField(T[][] d)
                                                            throws java.lang.IllegalArgumentException

Get the elements type from an array.

Type Parameters:

T - the type of the field elements

Parameters:

d - data array

Returns:

field to which array elements belong

Throws:

java.lang.IllegalArgumentException - if array is empty

extractField

protected static <T extends FieldElement<T>> Field<T> extractField(T[] d)
                                                            throws java.lang.IllegalArgumentException

Get the elements type from an array.

Type Parameters:

T - the type of the field elements

Parameters:

d - data array

Returns:

field to which array elements belong

Throws:

java.lang.IllegalArgumentException - if array is empty

buildArray

protected static <T extends FieldElement<T>> T[][] buildArray(Field<T> field,
                                                              int rows,
                                                              int columns)

Build an array of elements.

Complete arrays are filled with field.getZero()

Type Parameters:

T - the type of the field elements

Parameters:

field - field to which array elements belong

rows - number of rows

columns - number of columns (may be negative to build partial arrays in the same way new Field[rows][] works)

Returns:

a new array

buildArray

protected static <T extends FieldElement<T>> T[] buildArray(Field<T> field,
                                                            int length)

Build an array of elements.

Arrays are filled with field.getZero()

Type Parameters:

T - the type of the field elements

Parameters:

field - field to which array elements belong

length - of the array

Returns:

a new array

getField

public Field<T> getField()

Get the type of field elements of the matrix.

Specified by:

getField in interface FieldMatrix<T extends FieldElement<T>>

Returns:

type of field elements of the matrix

createMatrix

public abstract FieldMatrix<T> createMatrix(int rowDimension,
                                            int columnDimension)
                                     throws java.lang.IllegalArgumentException

Create a new FieldMatrix of the same type as the instance with the supplied row and column dimensions.

Specified by:

createMatrix in interface FieldMatrix<T extends FieldElement<T>>

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 abstract FieldMatrix<T> copy()

Returns a (deep) copy of this.

Specified by:

copy in interface FieldMatrix<T extends FieldElement<T>>

Returns:

matrix copy

add

public FieldMatrix<T> add(FieldMatrix<T> m)
                   throws java.lang.IllegalArgumentException

Compute the sum of this and m.

Specified by:

add in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

m - matrix to be added

Returns:

this + m

Throws:

java.lang.IllegalArgumentException - if m is not the same size as this

subtract

public FieldMatrix<T> subtract(FieldMatrix<T> m)
                        throws java.lang.IllegalArgumentException

Compute this minus m.

Specified by:

subtract in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

m - matrix to be subtracted

Returns:

this + m

Throws:

java.lang.IllegalArgumentException - if m is not the same size as this

scalarAdd

public FieldMatrix<T> scalarAdd(T d)

Returns the result of adding d to each entry of this.

Specified by:

scalarAdd in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

d - value to be added to each entry

Returns:

d + this

scalarMultiply

public FieldMatrix<T> scalarMultiply(T d)

Returns the result multiplying each entry of this by d.

Specified by:

scalarMultiply in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

d - value to multiply all entries by

Returns:

d * this

multiply

public FieldMatrix<T> multiply(FieldMatrix<T> m)
                        throws java.lang.IllegalArgumentException

Returns the result of postmultiplying this by m.

Specified by:

multiply in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

m - matrix to postmultiply by

Returns:

this * m

Throws:

java.lang.IllegalArgumentException - if columnDimension(this) != rowDimension(m)

preMultiply

public FieldMatrix<T> preMultiply(FieldMatrix<T> m)
                           throws java.lang.IllegalArgumentException

Returns the result premultiplying this by m.

Specified by:

preMultiply in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

m - matrix to premultiply by

Returns:

m * this

Throws:

java.lang.IllegalArgumentException - if rowDimension(this) != columnDimension(m)

getData

public T[][] getData()

Returns matrix entries as a two-dimensional array.

Specified by:

getData in interface FieldMatrix<T extends FieldElement<T>>

Returns:

2-dimensional array of entries

getSubMatrix

public FieldMatrix<T> getSubMatrix(int startRow,
                                   int endRow,
                                   int startColumn,
                                   int endColumn)
                            throws MatrixIndexException

Gets a submatrix. Rows and columns are indicated counting from 0 to n-1.

Specified by:

getSubMatrix in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

startRow - Initial row index

endRow - Final row index (inclusive)

startColumn - Initial column index

endColumn - Final column index (inclusive)

Returns:

The subMatrix containing the data of the specified rows and columns

Throws:

MatrixIndexException - if the indices are not valid

getSubMatrix

public FieldMatrix<T> getSubMatrix(int[] selectedRows,
                                   int[] selectedColumns)
                            throws MatrixIndexException

Gets a submatrix. Rows and columns are indicated counting from 0 to n-1.

Specified by:

getSubMatrix in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

selectedRows - Array of row indices.

selectedColumns - Array of column indices.

Returns:

The subMatrix containing the data in the specified rows and columns

Throws:

MatrixIndexException - if row or column selections are not valid

copySubMatrix

public void copySubMatrix(int startRow,
                          int endRow,
                          int startColumn,
                          int endColumn,
                          T[][] destination)
                   throws MatrixIndexException,
                          java.lang.IllegalArgumentException

Copy a submatrix. Rows and columns are indicated counting from 0 to n-1.

Specified by:

copySubMatrix in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

startRow - Initial row index

endRow - Final row index (inclusive)

startColumn - Initial column index

endColumn - Final column index (inclusive)

destination - The arrays where the submatrix data should be copied (if larger than rows/columns counts, only the upper-left part will be used)

Throws:

MatrixIndexException - if the indices are not valid

java.lang.IllegalArgumentException - if the destination array is too small

copySubMatrix

public void copySubMatrix(int[] selectedRows,
                          int[] selectedColumns,
                          T[][] destination)
                   throws MatrixIndexException,
                          java.lang.IllegalArgumentException

Copy a submatrix. Rows and columns are indicated counting from 0 to n-1.

Specified by:

copySubMatrix in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

selectedRows - Array of row indices.

selectedColumns - Array of column indices.

destination - The arrays where the submatrix data should be copied (if larger than rows/columns counts, only the upper-left part will be used)

Throws:

MatrixIndexException - if the indices are not valid

java.lang.IllegalArgumentException - if the destination array is too small

setSubMatrix

public void setSubMatrix(T[][] 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 FieldMatrix<T extends FieldElement<T>>

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)

getRowMatrix

public FieldMatrix<T> getRowMatrix(int row)
                            throws MatrixIndexException

Returns the entries in row number row as a row matrix. Row indices start at 0.

Specified by:

getRowMatrix in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

row - the row to be fetched

Returns:

row matrix

Throws:

MatrixIndexException - if the specified row index is invalid

setRowMatrix

public void setRowMatrix(int row,
                         FieldMatrix<T> matrix)
                  throws MatrixIndexException,
                         InvalidMatrixException

Sets the entries in row number row as a row matrix. Row indices start at 0.

Specified by:

setRowMatrix in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

row - the row to be set

matrix - row matrix (must have one row and the same number of columns as the instance)

Throws:

MatrixIndexException - if the specified row index is invalid

InvalidMatrixException - if the matrix dimensions do not match one instance row

getColumnMatrix

public FieldMatrix<T> getColumnMatrix(int column)
                               throws MatrixIndexException

Returns the entries in column number column as a column matrix. Column indices start at 0.

Specified by:

getColumnMatrix in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

column - the column to be fetched

Returns:

column matrix

Throws:

MatrixIndexException - if the specified column index is invalid

setColumnMatrix

public void setColumnMatrix(int column,
                            FieldMatrix<T> matrix)
                     throws MatrixIndexException,
                            InvalidMatrixException

Sets the entries in column number column as a column matrix. Column indices start at 0.

Specified by:

setColumnMatrix in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

column - the column to be set

matrix - column matrix (must have one column and the same number of rows as the instance)

Throws:

MatrixIndexException - if the specified column index is invalid

InvalidMatrixException - if the matrix dimensions do not match one instance column

getRowVector

public FieldVector<T> getRowVector(int row)
                            throws MatrixIndexException

Returns the entries in row number row as a vector. Row indices start at 0.

Specified by:

getRowVector in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

row - the row to be fetched

Returns:

row vector

Throws:

MatrixIndexException - if the specified row index is invalid

setRowVector

public void setRowVector(int row,
                         FieldVector<T> vector)
                  throws MatrixIndexException,
                         InvalidMatrixException

Sets the entries in row number row as a vector. Row indices start at 0.

Specified by:

setRowVector in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

row - the row to be set

vector - row vector (must have the same number of columns as the instance)

Throws:

MatrixIndexException - if the specified row index is invalid

InvalidMatrixException - if the vector dimension does not match one instance row

getColumnVector

public FieldVector<T> getColumnVector(int column)
                               throws MatrixIndexException

Returns the entries in column number column as a vector. Column indices start at 0.

Specified by:

getColumnVector in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

column - the column to be fetched

Returns:

column vector

Throws:

MatrixIndexException - if the specified column index is invalid

setColumnVector

public void setColumnVector(int column,
                            FieldVector<T> vector)
                     throws MatrixIndexException,
                            InvalidMatrixException

Sets the entries in column number column as a vector. Column indices start at 0.

Specified by:

setColumnVector in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

column - the column to be set

vector - column vector (must have the same number of rows as the instance)

Throws:

MatrixIndexException - if the specified column index is invalid

InvalidMatrixException - if the vector dimension does not match one instance column

getRow

public T[] getRow(int row)
           throws MatrixIndexException

Returns the entries in row number row as an array.

Row indices start at 0. A MatrixIndexException is thrown unless 0 <= row < rowDimension.

Specified by:

getRow in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

row - the row to be fetched

Returns:

array of entries in the row

Throws:

MatrixIndexException - if the specified row index is not valid

setRow

public void setRow(int row,
                   T[] array)
            throws MatrixIndexException,
                   InvalidMatrixException

Sets the entries in row number row as a row matrix. Row indices start at 0.

Specified by:

setRow in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

row - the row to be set

array - row matrix (must have the same number of columns as the instance)

Throws:

MatrixIndexException - if the specified row index is invalid

InvalidMatrixException - if the array size does not match one instance row

getColumn

public T[] getColumn(int column)
              throws MatrixIndexException

Returns the entries in column number col as an array.

Column indices start at 0. A MatrixIndexException is thrown unless 0 <= column < columnDimension.

Specified by:

getColumn in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

column - the column to be fetched

Returns:

array of entries in the column

Throws:

MatrixIndexException - if the specified column index is not valid

setColumn

public void setColumn(int column,
                      T[] array)
               throws MatrixIndexException,
                      InvalidMatrixException

Sets the entries in column number column as a column matrix. Column indices start at 0.

Specified by:

setColumn in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

column - the column to be set

array - column array (must have the same number of rows as the instance)

Throws:

MatrixIndexException - if the specified column index is invalid

InvalidMatrixException - if the array size does not match one instance column

getEntry

public abstract T 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 FieldMatrix<T extends FieldElement<T>>

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 abstract void setEntry(int row,
                              int column,
                              T 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 FieldMatrix<T extends FieldElement<T>>

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 abstract void addToEntry(int row,
                                int column,
                                T 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 FieldMatrix<T extends FieldElement<T>>

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 abstract void multiplyEntry(int row,
                                   int column,
                                   T 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 FieldMatrix<T extends FieldElement<T>>

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

transpose

public FieldMatrix<T> transpose()

Returns the transpose of this matrix.

Specified by:

transpose in interface FieldMatrix<T extends FieldElement<T>>

Returns:

transpose matrix

isSquare

public boolean isSquare()

Is this a square matrix?

Specified by:

isSquare in interface AnyMatrix

Returns:

true if the matrix is square (rowDimension = columnDimension)

getRowDimension

public abstract int getRowDimension()

Returns the number of rows in the matrix.

Specified by:

getRowDimension in interface AnyMatrix

Returns:

rowDimension

getColumnDimension

public abstract int getColumnDimension()

Returns the number of columns in the matrix.

Specified by:

getColumnDimension in interface AnyMatrix

Returns:

columnDimension

getTrace

public T getTrace()
           throws NonSquareMatrixException

Returns the trace of the matrix (the sum of the elements on the main diagonal).

Specified by:

getTrace in interface FieldMatrix<T extends FieldElement<T>>

Returns:

trace

Throws:

NonSquareMatrixException - if the matrix is not square

operate

public T[] operate(T[] v)
            throws java.lang.IllegalArgumentException

Returns the result of multiplying this by the vector v.

Specified by:

operate in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

v - the vector to operate on

Returns:

this*v

Throws:

java.lang.IllegalArgumentException - if columnDimension != v.size()

operate

public FieldVector<T> operate(FieldVector<T> v)
                       throws java.lang.IllegalArgumentException

Returns the result of multiplying this by the vector v.

Specified by:

operate in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

v - the vector to operate on

Returns:

this*v

Throws:

java.lang.IllegalArgumentException - if columnDimension != v.size()

preMultiply

public T[] preMultiply(T[] v)
                throws java.lang.IllegalArgumentException

Returns the (row) vector result of premultiplying this by the vector v.

Specified by:

preMultiply in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

v - the row vector to premultiply by

Returns:

v*this

Throws:

java.lang.IllegalArgumentException - if rowDimension != v.size()

preMultiply

public FieldVector<T> preMultiply(FieldVector<T> v)
                           throws java.lang.IllegalArgumentException

Returns the (row) vector result of premultiplying this by the vector v.

Specified by:

preMultiply in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

v - the row vector to premultiply by

Returns:

v*this

Throws:

java.lang.IllegalArgumentException - if rowDimension != v.size()

walkInRowOrder

public T walkInRowOrder(FieldMatrixChangingVisitor<T> 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 FieldMatrix<T extends FieldElement<T>>

Parameters:

visitor - visitor used to process all matrix entries

Returns:

the value returned by FieldMatrixChangingVisitor.end() at the end of the walk

Throws:

MatrixVisitorException - if the visitor cannot process an entry

See Also:

FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInRowOrder

public T walkInRowOrder(FieldMatrixPreservingVisitor<T> 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 FieldMatrix<T extends FieldElement<T>>

Parameters:

visitor - visitor used to process all matrix entries

Returns:

the value returned by FieldMatrixPreservingVisitor.end() at the end of the walk

Throws:

MatrixVisitorException - if the visitor cannot process an entry

See Also:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInRowOrder

public T walkInRowOrder(FieldMatrixChangingVisitor<T> 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 FieldMatrix<T extends FieldElement<T>>

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 FieldMatrixChangingVisitor.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:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInRowOrder

public T walkInRowOrder(FieldMatrixPreservingVisitor<T> 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 FieldMatrix<T extends FieldElement<T>>

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 FieldMatrixPreservingVisitor.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:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInColumnOrder

public T walkInColumnOrder(FieldMatrixChangingVisitor<T> 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 FieldMatrix<T extends FieldElement<T>>

Parameters:

visitor - visitor used to process all matrix entries

Returns:

the value returned by FieldMatrixChangingVisitor.end() at the end of the walk

Throws:

MatrixVisitorException - if the visitor cannot process an entry

See Also:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInColumnOrder

public T walkInColumnOrder(FieldMatrixPreservingVisitor<T> 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 FieldMatrix<T extends FieldElement<T>>

Parameters:

visitor - visitor used to process all matrix entries

Returns:

the value returned by FieldMatrixPreservingVisitor.end() at the end of the walk

Throws:

MatrixVisitorException - if the visitor cannot process an entry

See Also:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInColumnOrder

public T walkInColumnOrder(FieldMatrixChangingVisitor<T> 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 FieldMatrix<T extends FieldElement<T>>

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 FieldMatrixChangingVisitor.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:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInColumnOrder

public T walkInColumnOrder(FieldMatrixPreservingVisitor<T> 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 FieldMatrix<T extends FieldElement<T>>

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 FieldMatrixPreservingVisitor.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:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInOptimizedOrder

public T walkInOptimizedOrder(FieldMatrixChangingVisitor<T> visitor)
                       throws MatrixVisitorException

Visit (and possibly change) all matrix entries using the fastest possible order.

The fastest walking order depends on the exact matrix class. It may be different from traditional row or column orders.

Specified by:

walkInOptimizedOrder in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

visitor - visitor used to process all matrix entries

Returns:

the value returned by FieldMatrixChangingVisitor.end() at the end of the walk

Throws:

MatrixVisitorException - if the visitor cannot process an entry

See Also:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInOptimizedOrder

public T walkInOptimizedOrder(FieldMatrixPreservingVisitor<T> visitor)
                       throws MatrixVisitorException

Visit (but don't change) all matrix entries using the fastest possible order.

The fastest walking order depends on the exact matrix class. It may be different from traditional row or column orders.

Specified by:

walkInOptimizedOrder in interface FieldMatrix<T extends FieldElement<T>>

Parameters:

visitor - visitor used to process all matrix entries

Returns:

the value returned by FieldMatrixPreservingVisitor.end() at the end of the walk

Throws:

MatrixVisitorException - if the visitor cannot process an entry

See Also:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInOptimizedOrder

public T walkInOptimizedOrder(FieldMatrixChangingVisitor<T> visitor,
                              int startRow,
                              int endRow,
                              int startColumn,
                              int endColumn)
                       throws MatrixIndexException,
                              MatrixVisitorException

Visit (and possibly change) some matrix entries using the fastest possible order.

The fastest walking order depends on the exact matrix class. It may be different from traditional row or column orders.

Specified by:

walkInOptimizedOrder in interface FieldMatrix<T extends FieldElement<T>>

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 (inclusive)

Returns:

the value returned by FieldMatrixChangingVisitor.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:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor, int, int, int, int)

walkInOptimizedOrder

public T walkInOptimizedOrder(FieldMatrixPreservingVisitor<T> visitor,
                              int startRow,
                              int endRow,
                              int startColumn,
                              int endColumn)
                       throws MatrixIndexException,
                              MatrixVisitorException

Visit (but don't change) some matrix entries using the fastest possible order.

The fastest walking order depends on the exact matrix class. It may be different from traditional row or column orders.

Specified by:

walkInOptimizedOrder in interface FieldMatrix<T extends FieldElement<T>>

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 (inclusive)

Returns:

the value returned by FieldMatrixPreservingVisitor.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:

FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInRowOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInRowOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInColumnOrder(FieldMatrixChangingVisitor, int, int, int, int), FieldMatrix.walkInColumnOrder(FieldMatrixPreservingVisitor, int, int, int, int), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixPreservingVisitor), FieldMatrix.walkInOptimizedOrder(FieldMatrixChangingVisitor, int, int, int, int)

toString

public java.lang.String toString()

Get a string representation for this matrix.

Overrides:

toString in class java.lang.Object

Returns:

a string representation for this matrix

equals

public boolean equals(java.lang.Object object)

Returns true iff object is a FieldMatrix instance with the same dimensions as this and all corresponding matrix entries are equal.

Overrides:

equals in class java.lang.Object

Parameters:

object - the object to test equality against.

Returns:

true if object equals this

hashCode

public int hashCode()

Computes a hashcode for the matrix.

Overrides:

hashCode in class java.lang.Object

Returns:

hashcode for matrix

checkRowIndex

protected void checkRowIndex(int row)

Check if a row index is valid.

Parameters:

row - row index to check

Throws:

MatrixIndexException - if index is not valid

checkColumnIndex

protected void checkColumnIndex(int column)
                         throws MatrixIndexException

Check if a column index is valid.

Parameters:

column - column index to check

Throws:

MatrixIndexException - if index is not valid

checkSubMatrixIndex

protected void checkSubMatrixIndex(int startRow,
                                   int endRow,
                                   int startColumn,
                                   int endColumn)

Check if submatrix ranges indices are valid. Rows and columns are indicated counting from 0 to n-1.

Parameters:

startRow - Initial row index

endRow - Final row index

startColumn - Initial column index

endColumn - Final column index

Throws:

MatrixIndexException - if the indices are not valid

checkSubMatrixIndex

protected void checkSubMatrixIndex(int[] selectedRows,
                                   int[] selectedColumns)

Check if submatrix ranges indices are valid. Rows and columns are indicated counting from 0 to n-1.

Parameters:

selectedRows - Array of row indices.

selectedColumns - Array of column indices.

Throws:

MatrixIndexException - if row or column selections are not valid

checkAdditionCompatible

protected void checkAdditionCompatible(FieldMatrix<T> m)

Check if a matrix is addition compatible with the instance

Parameters:

m - matrix to check

Throws:

java.lang.IllegalArgumentException - if matrix is not addition compatible with instance

checkSubtractionCompatible

protected void checkSubtractionCompatible(FieldMatrix<T> m)

Check if a matrix is subtraction compatible with the instance

Parameters:

m - matrix to check

Throws:

java.lang.IllegalArgumentException - if matrix is not subtraction compatible with instance

checkMultiplicationCompatible

protected void checkMultiplicationCompatible(FieldMatrix<T> m)

Check if a matrix is multiplication compatible with the instance

Parameters:

m - matrix to check

Throws:

java.lang.IllegalArgumentException - if matrix is not multiplication compatible with instance