com.powerdata.openpa.tools.matrix

Class SpSymFltMatrix

java.lang.Object

com.powerdata.openpa.tools.matrix.SpSymFltMatrix

All Implemented Interfaces:

FloatMatrix

Direct Known Subclasses:

BDblPrime, BPrime

public class SpSymFltMatrix
extends java.lang.Object
implements FloatMatrix

Sparse Symmetric matrix with a floating-point value. This class effectively "wraps" a set of adjacencies (LinkNet) created independently. It is intended to allow the same set of adjacencies to be used in multiple matrices...as such no changes are permitted to adjacencies after this object is constructed and initialized.

Nested Class Summary

Nested classes/interfaces inherited from interface com.powerdata.openpa.tools.matrix.FloatMatrix

FloatMatrix.RowFunction

Method Summary

Modifier and Type	Method and Description
void	addInPlace(int f, int t, float b) Add a value in place
void	dump(java.lang.String[] name, java.io.PrintWriter pw)
FactorizedFltMatrix	factorize(int[] ref)
FactorizedFltMatrix	factorize(SpSymMtrxFactPattern pat) Create a factorized susceptance matrix using a saved pattern Neither the pattern nor susceptance arrays are modified
float[]	getBDiag()
int	getColumnCount() Return the number of columns in the matrix
int	getRowCount() Return the number of rows in the matrix.
float	getValue(int row, int column) Get a value
void	incBdiag(int bus, float b) modify susceptence entry on the diagonal
void	incBoffdiag(int br, float b) modify susceptance for an off-diagonal entry
void	multInPlace(int row, int column, float value) Multiply a value in place
void	setValue(int row, int column, float value) Set a value

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.powerdata.openpa.tools.matrix.FloatMatrix

backwardSubstitution, divInPlace, rotateGivens, subInPlace, wrap

Method Detail

factorize

public FactorizedFltMatrix factorize(int[] ref)

addInPlace

public void addInPlace(int f,
                       int t,
                       float b)

Description copied from interface: FloatMatrix

Add a value in place

Specified by:

addInPlace in interface FloatMatrix

Parameters:

f - location of updated value

t - location of updated value

b - to add at given location

incBdiag

public void incBdiag(int bus,
                     float b)

modify susceptence entry on the diagonal

incBoffdiag

public void incBoffdiag(int br,
                        float b)

modify susceptance for an off-diagonal entry

factorize

public FactorizedFltMatrix factorize(SpSymMtrxFactPattern pat)

Create a factorized susceptance matrix using a saved pattern Neither the pattern nor susceptance arrays are modified

Parameters:

bdiag - diagonal susceptance values (array with size equal to number of buses)

boffdiag - off-diagonal susceptance values (array with size equal to number of branches)

Returns:

factorized susceptance matrix

dump

public void dump(java.lang.String[] name,
                 java.io.PrintWriter pw)

getBDiag

public float[] getBDiag()

getRowCount

public int getRowCount()

Description copied from interface: FloatMatrix

Return the number of rows in the matrix.

Specified by:

getRowCount in interface FloatMatrix

Returns:

Number of matrix rows

getColumnCount

public int getColumnCount()

Description copied from interface: FloatMatrix

Return the number of columns in the matrix

Specified by:

getColumnCount in interface FloatMatrix

Returns:

Number of matrix columns

setValue

public void setValue(int row,
                     int column,
                     float value)

Description copied from interface: FloatMatrix

Set a value

Specified by:

setValue in interface FloatMatrix

Parameters:

row - location of new value

column - location of new value

value - value to store

getValue

public float getValue(int row,
                      int column)

Description copied from interface: FloatMatrix

Get a value

Specified by:

getValue in interface FloatMatrix

Parameters:

row - location of new value

column - location of new value

Returns:

value stored at given location

multInPlace

public void multInPlace(int row,
                        int column,
                        float value)

Description copied from interface: FloatMatrix

Multiply a value in place

Specified by:

multInPlace in interface FloatMatrix

Parameters:

row - location of updated value

column - location of updated value

value - to multiply at given location