Package no.uib.cipr.matrix.sparse
Class CompRowMatrix
java.lang.Object
no.uib.cipr.matrix.AbstractMatrix
no.uib.cipr.matrix.sparse.CompRowMatrix
- All Implemented Interfaces:
Iterable<MatrixEntry>
,Matrix
Compressed row storage (CRS) matrix
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Nested Class Summary
Nested classes/interfaces inherited from interface no.uib.cipr.matrix.Matrix
Matrix.Norm
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Field Summary
Fields inherited from class no.uib.cipr.matrix.AbstractMatrix
numColumns, numRows
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Constructor Summary
ConstructorsConstructorDescriptionCompRowMatrix
(int numRows, int numColumns, int[][] nz) Constructor for CompRowMatrixConstructor for CompRowMatrixConstructor for CompRowMatrixCompRowMatrix
(Matrix A, boolean deep) Constructor for CompRowMatrix -
Method Summary
Modifier and TypeMethodDescriptionvoid
add
(int row, int column, double value) A(row,column) += value
copy()
Creates a deep copy of the matrixdouble
get
(int row, int column) ReturnsA(row,column)
int[]
Returns the column indicesdouble[]
getData()
Returns the internal data storageint[]
Returns the row pointersiterator()
C = A*B
y = A*x
y = alpha*A*x + y
void
set
(int row, int column, double value) A(row,column) = value
A=B
.y = AT*x
transMultAdd
(double alpha, Vector x, Vector y) y = alpha*AT*x + y
zero()
Zeros all the entries in the matrix, while preserving any underlying structure.Methods inherited from class no.uib.cipr.matrix.AbstractMatrix
add, add, check, checkMultAdd, checkMultAdd, checkRank1, checkRank1, checkRank2, checkRank2, checkSize, checkSolve, checkSolve, checkTransABmultAdd, checkTransAmultAdd, checkTransBmultAdd, checkTransMultAdd, checkTranspose, checkTranspose, checkTransRank1, checkTransRank2, isSquare, max, max, mult, mult, multAdd, multAdd, multAdd, norm, norm1, normF, normInf, numColumns, numRows, rank1, rank1, rank1, rank1, rank1, rank1, rank2, rank2, rank2, rank2, scale, set, solve, solve, toString, transABmult, transABmult, transABmultAdd, transABmultAdd, transAmult, transAmult, transAmultAdd, transAmultAdd, transBmult, transBmult, transBmultAdd, transBmultAdd, transMult, transMultAdd, transpose, transpose, transRank1, transRank1, transRank2, transRank2, transSolve, transSolve
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface java.lang.Iterable
forEach, spliterator
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Constructor Details
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CompRowMatrix
Constructor for CompRowMatrix- Parameters:
r
- Reader to get sparse matrix from- Throws:
IOException
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CompRowMatrix
public CompRowMatrix(int numRows, int numColumns, int[][] nz) Constructor for CompRowMatrix- Parameters:
numRows
- Number of rowsnumColumns
- Number of columnsnz
- The nonzero column indices on each row
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CompRowMatrix
Constructor for CompRowMatrix- Parameters:
A
- Copies from this matrixdeep
- True if the copy is to be deep. If it is a shallow copy,A
must be aCompRowMatrix
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CompRowMatrix
Constructor for CompRowMatrix- Parameters:
A
- Copies from this matrix. The copy will be deep
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Method Details
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getColumnIndices
public int[] getColumnIndices()Returns the column indices -
getRowPointers
public int[] getRowPointers()Returns the row pointers -
getData
public double[] getData()Returns the internal data storage -
mult
Description copied from interface:Matrix
C = A*B
- Specified by:
mult
in interfaceMatrix
- Overrides:
mult
in classAbstractMatrix
- Parameters:
B
- Matrix such thatB.numRows() == A.numColumns()
andB.numColumns() == C.numColumns()
C
- Matrix such thatC.numRows() == A.numRows()
andB.numColumns() == C.numColumns()
- Returns:
- C
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mult
Description copied from interface:Matrix
y = A*x
- Specified by:
mult
in interfaceMatrix
- Overrides:
mult
in classAbstractMatrix
- Parameters:
x
- Vector of sizeA.numColumns()
y
- Vector of sizeA.numRows()
- Returns:
- y
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multAdd
Description copied from interface:Matrix
y = alpha*A*x + y
- Specified by:
multAdd
in interfaceMatrix
- Overrides:
multAdd
in classAbstractMatrix
- Parameters:
x
- Vector of sizeA.numColumns()
y
- Vector of sizeA.numRows()
- Returns:
- y
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transMult
Description copied from interface:Matrix
y = AT*x
- Specified by:
transMult
in interfaceMatrix
- Overrides:
transMult
in classAbstractMatrix
- Parameters:
x
- Vector of sizeA.numRows()
y
- Vector of sizeA.numColumns()
- Returns:
- y
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transMultAdd
Description copied from interface:Matrix
y = alpha*AT*x + y
- Specified by:
transMultAdd
in interfaceMatrix
- Overrides:
transMultAdd
in classAbstractMatrix
- Parameters:
x
- Vector of sizeA.numRows()
y
- Vector of sizeA.numColumns()
- Returns:
- y
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set
public void set(int row, int column, double value) Description copied from interface:Matrix
A(row,column) = value
- Specified by:
set
in interfaceMatrix
- Overrides:
set
in classAbstractMatrix
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add
public void add(int row, int column, double value) Description copied from interface:Matrix
A(row,column) += value
- Specified by:
add
in interfaceMatrix
- Overrides:
add
in classAbstractMatrix
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get
public double get(int row, int column) Description copied from interface:Matrix
ReturnsA(row,column)
- Specified by:
get
in interfaceMatrix
- Overrides:
get
in classAbstractMatrix
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copy
Description copied from interface:Matrix
Creates a deep copy of the matrix- Specified by:
copy
in interfaceMatrix
- Overrides:
copy
in classAbstractMatrix
- Returns:
- A
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iterator
- Specified by:
iterator
in interfaceIterable<MatrixEntry>
- Overrides:
iterator
in classAbstractMatrix
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zero
Description copied from interface:Matrix
Zeros all the entries in the matrix, while preserving any underlying structure. Useful for general, unstructured matrices.- Specified by:
zero
in interfaceMatrix
- Overrides:
zero
in classAbstractMatrix
- Returns:
- A
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set
Description copied from interface:Matrix
A=B
. The matrices must be of the same size- Specified by:
set
in interfaceMatrix
- Overrides:
set
in classAbstractMatrix
- Returns:
- A
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