no.uib.cipr.matrix.sparse

Class CompColMatrix

java.lang.Object

no.uib.cipr.matrix.AbstractMatrix

no.uib.cipr.matrix.sparse.CompColMatrix

All Implemented Interfaces:

Iterable<MatrixEntry>, Matrix

public class CompColMatrix
extends AbstractMatrix

Compressed column storage (CCS) matrix

Nested Class Summary

Nested classes/interfaces inherited from interface no.uib.cipr.matrix.Matrix

Matrix.Norm

Field Summary

Fields inherited from class no.uib.cipr.matrix.AbstractMatrix

numColumns, numRows

Constructor Summary

Constructors

Constructor and Description
CompColMatrix(int numRows, int numColumns, int[][] nz) Constructor for CompColMatrix
CompColMatrix(Matrix A) Constructor for CompColMatrix
CompColMatrix(Matrix A, boolean deep) Constructor for CompColMatrix
CompColMatrix(MatrixVectorReader r) Constructor for CompColMatrix

Method Summary

Methods

Modifier and Type	Method and Description
void	add(int row, int column, double value) A(row,column) += value
CompColMatrix	copy() Creates a deep copy of the matrix
double	get(int row, int column) Returns A(row,column)
int[]	getColumnPointers() Returns the column pointers
double[]	getData() Returns the internal data storage
int[]	getRowIndices() Returns the row indices
Iterator<MatrixEntry>	iterator()
Vector	multAdd(double alpha, Vector x, Vector y) y = alpha*A*x + y
void	set(int row, int column, double value) A(row,column) = value
Vector	transMult(Vector x, Vector y) y = AT*x
Vector	transMultAdd(double alpha, Vector x, Vector y) y = alpha*AT*x + y
CompColMatrix	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, mult, mult, multAdd, multAdd, multAdd, norm, norm1, normF, normInf, numColumns, numRows, rank1, rank1, rank1, rank1, rank1, rank1, rank2, rank2, rank2, rank2, scale, set, 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

Constructor Detail

CompColMatrix

public CompColMatrix(MatrixVectorReader r)
              throws IOException

Constructor for CompColMatrix

Parameters:

r - Reader to get sparse matrix from

Throws:

IOException

CompColMatrix

public CompColMatrix(int numRows,
             int numColumns,
             int[][] nz)

Constructor for CompColMatrix

Parameters:

numRows - Number of rows

numColumns - Number of columns

nz - The nonzero column indices on each column

CompColMatrix

public CompColMatrix(Matrix A,
             boolean deep)

Constructor for CompColMatrix

Parameters:

A - Copies from this matrix

deep - True if the copy is to be deep. If it is a shallow copy, A must be a CompColMatrix

CompColMatrix

public CompColMatrix(Matrix A)

Constructor for CompColMatrix

Parameters:

A - Copies from this matrix. The copy will be deep

Method Detail

getColumnPointers

public int[] getColumnPointers()

Returns the column pointers

getRowIndices

public int[] getRowIndices()

Returns the row indices

getData

public double[] getData()

Returns the internal data storage

multAdd

public Vector multAdd(double alpha,
             Vector x,
             Vector y)

Description copied from interface: Matrix

y = alpha*A*x + y

Specified by:

multAdd in interface Matrix

Overrides:

multAdd in class AbstractMatrix

x - Vector of size A.numColumns()

y - Vector of size A.numRows()

Returns:

y

transMult

public Vector transMult(Vector x,
               Vector y)

Description copied from interface: Matrix

y = AT*x

Specified by:

transMult in interface Matrix

Overrides:

transMult in class AbstractMatrix

Parameters:

x - Vector of size A.numRows()

y - Vector of size A.numColumns()

Returns:

y

transMultAdd

public Vector transMultAdd(double alpha,
                  Vector x,
                  Vector y)

Description copied from interface: Matrix

y = alpha*AT*x + y

Specified by:

transMultAdd in interface Matrix

Overrides:

transMultAdd in class AbstractMatrix

x - Vector of size A.numRows()

y - Vector of size A.numColumns()

Returns:

y

set

public void set(int row,
       int column,
       double value)

Description copied from interface: Matrix

A(row,column) = value

Specified by:

set in interface Matrix

Overrides:

set in class AbstractMatrix

add

public void add(int row,
       int column,
       double value)

Description copied from interface: Matrix

A(row,column) += value

Specified by:

add in interface Matrix

Overrides:

add in class AbstractMatrix

get

public double get(int row,
         int column)

Description copied from interface: Matrix

Returns A(row,column)

Specified by:

get in interface Matrix

Overrides:

get in class AbstractMatrix

copy

public CompColMatrix copy()

Description copied from interface: Matrix

Creates a deep copy of the matrix

Specified by:

copy in interface Matrix

Overrides:

copy in class AbstractMatrix

Returns:

A

iterator

public Iterator<MatrixEntry> iterator()

Specified by:

iterator in interface Iterable<MatrixEntry>

Overrides:

iterator in class AbstractMatrix

zero

public CompColMatrix 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 interface Matrix

Overrides:

zero in class AbstractMatrix

Returns:

A