org.interpss.numeric.sparse

Interface ISparseEqnDouble

All Superinterfaces:

ISparseEquation

All Known Implementing Classes:

AbstractSparseEqnDoubleImpl, AbstractSparseEqnMatrix2x2Impl, CSJSparseEqnDoubleImpl, CSJSparseEqnMatrix2x2Impl

public interface ISparseEqnDouble
extends ISparseEquation

Sparse Equation of data type double for solving the [A]X=B problem. To outside, the index number is from 0 to n-1

Nested Class Summary

Nested classes/interfaces inherited from interface org.interpss.numeric.sparse.base.ISparseEquation

ISparseEquation.IndexType

Method Summary

Modifier and Type	Method and Description
void	addToAij(double x, int i, int j) Add the aij element to the matrix.
void	addToBi(double bi, int i) add to the b[i] element.
double	getAij(int i, int j) Get the aij element.
double	getXi(int i) Get the x[i] element.
void	setAij(double x, int i, int j) Set the aij element.
void	setBi(double bi, int i) Set b[i] element.
double[]	solveLUedEqn(double[] b) Solve the [A]X = B problem after [A] is LUed

Methods inherited from interface org.interpss.numeric.sparse.base.ISparseEquation

factorization, factorization, getBusId, getDimension, getDimension, getTotalElements, getZeroAii_row, increaseDimension, isFactorized, isSquareMatrix, reset, setB2Unity, setB2Zero, setBusId, setFactorized, setToZero, solveEqn, solveEqn

Method Detail

addToAij

void addToAij(double x,
              int i,
              int j)

Add the aij element to the matrix. If aij exists, aij += x.

Parameters:

x - the aij element

i - the element row number

j - the element column number

getXi

double getXi(int i)

Get the x[i] element.

Parameters:

i - the element row number

Returns:

the x[i] element

setAij

void setAij(double x,
            int i,
            int j)

Set the aij element.

Parameters:

x - the aij element

i - the element row number

j - the element column number

getAij

double getAij(int i,
              int j)

Get the aij element.

Parameters:

i - the element row number

j - the element column number

setBi

void setBi(double bi,
           int i)

Set b[i] element.

Parameters:

bi - the bi element

i - row number

addToBi

void addToBi(double bi,
             int i)

add to the b[i] element.

Parameters:

bi - the bi element

i - row number

solveLUedEqn

double[] solveLUedEqn(double[] b)
               throws IpssNumericException

Solve the [A]X = B problem after [A] is LUed

Throws:

IpssNumericException