T - the type of the field elementspublic class SparseFieldMatrix<T extends FieldElement<T>> extends AbstractFieldMatrix<T>
Caveat: This implementation assumes that, for any x,
the equality x * 0d == 0d holds. But it is is not true for
NaN. Moreover, zero entries will lose their sign.
Some operations (that involve NaN and/or infinities) may
thus give incorrect results.
| Modifier and Type | Field and Description |
|---|---|
private int |
columns
Column dimension.
|
private OpenIntToFieldHashMap<T> |
entries
Storage for (sparse) matrix elements.
|
private int |
rows
Row dimension.
|
| Constructor and Description |
|---|
SparseFieldMatrix(Field<T> field)
Create a matrix with no data.
|
SparseFieldMatrix(Field<T> field,
int rowDimension,
int columnDimension)
Create a new SparseFieldMatrix
|
SparseFieldMatrix(FieldMatrix<T> other)
Generic copy constructor.
|
SparseFieldMatrix(SparseFieldMatrix<T> other)
Copy constructor.
|
| Modifier and Type | Method and Description |
|---|---|
void |
addToEntry(int row,
int column,
T increment)
Change an entry in the specified row and column.
|
private int |
computeKey(int row,
int column)
Compute the key to access a matrix element.
|
FieldMatrix<T> |
copy()
Make a (deep) copy of this.
|
FieldMatrix<T> |
createMatrix(int rowDimension,
int columnDimension)
Create a new FieldMatrix
|
int |
getColumnDimension()
Returns the number of columns in the matrix.
|
T |
getEntry(int row,
int column)
Returns the entry in the specified row and column.
|
int |
getRowDimension()
Returns the number of rows in the matrix.
|
void |
multiplyEntry(int row,
int column,
T factor)
Change an entry in the specified row and column.
|
void |
setEntry(int row,
int column,
T value)
Set the entry in the specified row and column.
|
add, buildArray, buildArray, checkAdditionCompatible, checkColumnIndex, checkMultiplicationCompatible, checkRowIndex, checkSubMatrixIndex, checkSubMatrixIndex, checkSubtractionCompatible, copySubMatrix, copySubMatrix, equals, extractField, extractField, getColumn, getColumnMatrix, getColumnVector, getData, getField, getRow, getRowMatrix, getRowVector, getSubMatrix, getSubMatrix, getTrace, hashCode, isSquare, multiply, operate, operate, power, preMultiply, preMultiply, preMultiply, scalarAdd, scalarMultiply, setColumn, setColumnMatrix, setColumnVector, setRow, setRowMatrix, setRowVector, setSubMatrix, subtract, toString, transpose, walkInColumnOrder, walkInColumnOrder, walkInColumnOrder, walkInColumnOrder, walkInOptimizedOrder, walkInOptimizedOrder, walkInOptimizedOrder, walkInOptimizedOrder, walkInRowOrder, walkInRowOrder, walkInRowOrder, walkInRowOrderprivate final OpenIntToFieldHashMap<T extends FieldElement<T>> entries
private final int rows
private final int columns
public SparseFieldMatrix(Field<T> field)
field - Field to which the elements belong.public SparseFieldMatrix(Field<T> field, int rowDimension, int columnDimension)
field - Field to which the elements belong.rowDimension - Number of rows in the new matrix.columnDimension - Number of columns in the new matrix.NotStrictlyPositiveException - if row or column dimension is not positive.public SparseFieldMatrix(SparseFieldMatrix<T> other)
other - Instance to copy.public SparseFieldMatrix(FieldMatrix<T> other)
other - Instance to copy.public void addToEntry(int row,
int column,
T increment)
addToEntry in interface FieldMatrix<T extends FieldElement<T>>addToEntry in class AbstractFieldMatrix<T extends FieldElement<T>>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).public FieldMatrix<T> copy()
copy in interface FieldMatrix<T extends FieldElement<T>>copy in class AbstractFieldMatrix<T extends FieldElement<T>>public FieldMatrix<T> createMatrix(int rowDimension, int columnDimension)
createMatrix in interface FieldMatrix<T extends FieldElement<T>>createMatrix in class AbstractFieldMatrix<T extends FieldElement<T>>rowDimension - the number of rows in the new matrixcolumnDimension - the number of columns in the new matrixpublic int getColumnDimension()
getColumnDimension in interface AnyMatrixgetColumnDimension in class AbstractFieldMatrix<T extends FieldElement<T>>public T getEntry(int row, int column)
getEntry in interface FieldMatrix<T extends FieldElement<T>>getEntry in class AbstractFieldMatrix<T extends FieldElement<T>>row - row location of entry to be fetchedcolumn - column location of entry to be fetchedpublic int getRowDimension()
getRowDimension in interface AnyMatrixgetRowDimension in class AbstractFieldMatrix<T extends FieldElement<T>>public void multiplyEntry(int row,
int column,
T factor)
multiplyEntry in interface FieldMatrix<T extends FieldElement<T>>multiplyEntry in class AbstractFieldMatrix<T extends FieldElement<T>>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)public void setEntry(int row,
int column,
T value)
setEntry in interface FieldMatrix<T extends FieldElement<T>>setEntry in class AbstractFieldMatrix<T extends FieldElement<T>>row - row location of entry to be setcolumn - column location of entry to be setvalue - matrix entry to be set in row,columnprivate int computeKey(int row,
int column)
row - Row index of the matrix element.column - Column index of the matrix element.Copyright (c) 2003-2015 Apache Software Foundation