no.uib.cipr.matrix
Class SPDTridiagMatrix

java.lang.Object
  no.uib.cipr.matrix.AbstractMatrix
      no.uib.cipr.matrix.SymmTridiagMatrix
          no.uib.cipr.matrix.SPDTridiagMatrix

All Implemented Interfaces:

java.lang.Iterable<MatrixEntry>, Matrix

public class SPDTridiagMatrix
extends SymmTridiagMatrix

Symmetrical positive definite tridiagonal matrix. Same as SymmTridiagMatrix, and is used as a marker class to allow for more efficient solvers.

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

SPDTridiagMatrix(int n)
Constructor for SPDTridiagMatrix

SPDTridiagMatrix(Matrix A)
Constructor for SPDTridiagMatrix

SPDTridiagMatrix(Matrix A, boolean deep)
Constructor for SPDTridiagMatrix

Method Summary

SPDTridiagMatrix	copy() Creates a deep copy of the matrix
Matrix	solve(Matrix B, Matrix X) X = A\B.

Methods inherited from class no.uib.cipr.matrix.SymmTridiagMatrix

add, get, getDiagonal, getOffDiagonal, iterator, set, solve, transpose, transSolve, transSolve, zero

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, multAdd, norm, norm1, normF, normInf, numColumns, numRows, rank1, rank1, rank1, rank1, rank1, rank1, rank2, rank2, rank2, rank2, scale, set, set, toString, transABmult, transABmult, transABmultAdd, transABmultAdd, transAmult, transAmult, transAmultAdd, transAmultAdd, transBmult, transBmult, transBmultAdd, transBmultAdd, transMult, transMult, transMultAdd, transMultAdd, transpose, transRank1, transRank1, transRank2, transRank2

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

SPDTridiagMatrix

public SPDTridiagMatrix(int n)

Constructor for SPDTridiagMatrix

Parameters:

n - Size of the matrix. Since the matrix must be square, this equals both the number of rows and columns

SPDTridiagMatrix

public SPDTridiagMatrix(Matrix A)

Constructor for SPDTridiagMatrix

Parameters:

A - Matrix to copy contents from. Only main and the superdiagonal is copied over

SPDTridiagMatrix

public SPDTridiagMatrix(Matrix A,
                        boolean deep)

Constructor for SPDTridiagMatrix

Parameters:

A - Matrix to copy contents from. Only main and the superdiagonal is copied over

deep - True for a deep copy. For shallow copies A must be a SymmTridiagMatrix

Method Detail

copy

public SPDTridiagMatrix copy()

Description copied from interface: Matrix

Creates a deep copy of the matrix

Specified by:

copy in interface Matrix

Overrides:

copy in class SymmTridiagMatrix

Returns:

A

solve

public Matrix solve(Matrix B,
                    Matrix X)

Description copied from interface: Matrix

X = A\B. Not all matrices support this operation, those that do not throw UnsupportedOperationException. Note that it is often more efficient to use a matrix decomposition and its associated solver

Specified by:

solve in interface Matrix

Overrides:

solve in class SymmTridiagMatrix

Parameters:

B - Matrix with the same number of rows as A, and the same number of columns as X

X - Matrix with a number of rows equal A.numColumns(), and the same number of columns as B

Returns:

X