Package edu.cmu.tetrad.util

Class Matrix2

java.lang.Object

edu.cmu.tetrad.util.Matrix2

All Implemented Interfaces:

TetradSerializable, Serializable

public class Matrix2
extends Object
implements TetradSerializable

Wraps the Apache math3 linear algebra library for most uses in Tetrad. Specialized uses will still have to use the library directly. One issue this fixes is that a BlockRealMatrix cannot represent a matrix with zero rows; this uses an Array2DRowRealMatrix to represent that case.

Author:

josephramsey

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
Matrix2(double[][] data)
Matrix2(int m, int n)
Matrix2(Matrix2 m)
Matrix2(org.apache.commons.math3.linear.RealMatrix data)

Method Summary

Modifier and Type	Method	Description
void	assign(Matrix2 matrix)
void	assignColumn(int col, Vector doubles)
void	assignRow(int row, Vector doubles)
Matrix2	copy()
double	det()
Vector	diag()
boolean	equals(Matrix2 m, double tolerance)
double	get(int i, int j)
org.apache.commons.math3.linear.RealMatrix	getApacheData()
Vector	getColumn(int j)
int	getNumColumns()
int	getNumRows()
Matrix2	getPart(int i, int j, int k, int l)
Vector	getRow(int i)
Matrix2	getSelection(int[] rows, int[] cols)
Matrix2	ginverse()
static Matrix2	identity(int rows)
Matrix2	inverse()
boolean	isSquare()
boolean	isSymmetric(double tolerance)
Matrix2	like()
Matrix2	minus(Matrix2 mb)
double	norm1()
Matrix2	plus(Matrix2 mb)
int	rank()
Matrix2	scalarMult(double scalar)
static Matrix2	serializableInstance()	Generates a simple exemplar of this class to test serialization.
void	set(int i, int j, double v)
static Matrix2	sparseMatrix(int m, int n)
Matrix2	sqrt()
Vector	sum(int direction)
Matrix2	symmetricInverse()
Matrix2	times(Matrix2 m)
Vector	times(Vector v)
double[][]	toArray()
String	toString()
double	trace()
Matrix2	transpose()
double	zSum()

Methods inherited from class java.lang.Object

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

Constructor Details

Matrix2

public Matrix2(double[][] data)

Matrix2

public Matrix2(org.apache.commons.math3.linear.RealMatrix data)

Matrix2

public Matrix2(int m,
 int n)

Matrix2

public Matrix2(Matrix2 m)

Method Details

identity

public static Matrix2 identity(int rows)

sparseMatrix

public static Matrix2 sparseMatrix(int m,
 int n)

serializableInstance

public static Matrix2 serializableInstance()

Generates a simple exemplar of this class to test serialization.

assign

public void assign(Matrix2 matrix)

getNumColumns

public int getNumColumns()

diag

public Vector diag()

getSelection

public Matrix2 getSelection(int[] rows,
 int[] cols)

copy

public Matrix2 copy()

getColumn

public Vector getColumn(int j)

times

public Matrix2 times(Matrix2 m)

times

public Vector times(Vector v)

toArray

public double[][] toArray()

getApacheData

public org.apache.commons.math3.linear.RealMatrix getApacheData()

get

public double get(int i,
 int j)

like

public Matrix2 like()

set

public void set(int i,
 int j,
 double v)

getRow

public Vector getRow(int i)

getPart

public Matrix2 getPart(int i,
 int j,
 int k,
 int l)

inverse

public Matrix2 inverse()
                throws org.apache.commons.math3.linear.SingularMatrixException

Throws:

org.apache.commons.math3.linear.SingularMatrixException

symmetricInverse

public Matrix2 symmetricInverse()

ginverse

public Matrix2 ginverse()

assignRow

public void assignRow(int row,
 Vector doubles)

assignColumn

public void assignColumn(int col,
 Vector doubles)

trace

public double trace()

det

public double det()

transpose

public Matrix2 transpose()

equals

public boolean equals(Matrix2 m,
 double tolerance)

isSquare

public boolean isSquare()

isSymmetric

public boolean isSymmetric(double tolerance)

minus

public Matrix2 minus(Matrix2 mb)

norm1

public double norm1()

plus

public Matrix2 plus(Matrix2 mb)

rank

public int rank()

getNumRows

public int getNumRows()

scalarMult

public Matrix2 scalarMult(double scalar)

sqrt

public Matrix2 sqrt()

sum

public Vector sum(int direction)

zSum

public double zSum()

toString

public String toString()

Overrides:

toString in class Object