BlockMatrixAlgorithm (PULsE 1.98 API)

java.lang.Object
- pulse.problem.schemes.TridiagonalMatrixAlgorithm
- - pulse.problem.schemes.BlockMatrixAlgorithm

All Implemented Interfaces:

Serializable
```
public class BlockMatrixAlgorithm
extends TridiagonalMatrixAlgorithm
```
A modification of the algorithm for solving a system of linear equations, where the first and last equation contains references to the last and first elements of the solution, respectively. The corresponding matrix is composed of an inner tridiagonal block and a border formed by an extra row and column. This block system is solved using the Sherman-Morrison-Woodbury identity and the Thomas algorithm for the main block.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

BlockMatrixAlgorithm(Grid grid)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`evaluateBeta(double[] U)`
`void`	`evaluateBeta(double[] U, int start, int endExclusive)`	Calculates the `beta` coefficients as part of the tridiagonal matrix algorithm.
`double[]`	`getGamma()`
`double[]`	`getP()`
`double[]`	`getQ()`
`void`	`setGamma(int i, double g)`
`void`	`sweep(double[] V)`	Calculates the solution `V` using the tridiagonal matrix algorithm.

Methods inherited from class pulse.problem.schemes.TridiagonalMatrixAlgorithm
beta, evaluateAlpha, getAlpha, getBeta, getCoefA, getCoefB, getCoefC, getGridPoints, getGridStep, getTimeStep, phi, setAlpha, setBeta, setCoefA, setCoefB, setCoefC

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - BlockMatrixAlgorithm
```
public BlockMatrixAlgorithm(Grid grid)
```
- Method Detail
  - sweep
```
public void sweep(double[] V)
```
    Description copied from class: TridiagonalMatrixAlgorithm
    
    Calculates the solution V using the tridiagonal matrix algorithm. This performs a backwards sweep from N - 1 to 0 where N is the grid density value. The coefficients alpha and beta should have been precalculated
    
    Overrides:
    
    sweep in class TridiagonalMatrixAlgorithm
    
    Parameters:
    
    V - the array containing the Nth value previously calculated from the respective boundary condition
  - evaluateBeta
```
public void evaluateBeta(double[] U)
```
    Overrides:
    
    evaluateBeta in class TridiagonalMatrixAlgorithm
  - evaluateBeta
```
public void evaluateBeta(double[] U,
                         int start,
                         int endExclusive)
```
    Description copied from class: TridiagonalMatrixAlgorithm
    
    Calculates the beta coefficients as part of the tridiagonal matrix algorithm.
    
    Overrides:
    
    evaluateBeta in class TridiagonalMatrixAlgorithm
  - getP
```
public double[] getP()
```
  - getQ
```
public double[] getQ()
```
  - setGamma
```
public void setGamma(int i,
                     double g)
```
  - getGamma
```
public double[] getGamma()
```