Package edu.cmu.tetrad.util

Class Matrix

java.lang.Object

edu.cmu.tetrad.util.Matrix

All Implemented Interfaces:

TetradSerializable, Serializable

public class Matrix
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:

Joseph Ramsey

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
Matrix(double[][] data)
Matrix(int m, int n)
Matrix(Matrix m)

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Details

Matrix

public Matrix(double[][] data)

Matrix

public Matrix(int m,
 int n)

Matrix

public Matrix(Matrix m)

Method Details

assign

public void assign(Matrix matrix)

columns

public int columns()

diag

public Vector diag()

getSelection

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

copy

public Matrix copy()

getColumn

public Vector getColumn(int j)

times

public Matrix times(Matrix m)

times

public Vector times(Vector v)

toArray

public double[][] toArray()

get

public double get(int i,
 int j)

like

public Matrix like()

set

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

getRow

public Vector getRow(int i)

getPart

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

inverse

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

Throws:

org.apache.commons.math3.linear.SingularMatrixException

symmetricInverse

public Matrix symmetricInverse()

ginverse

public Matrix ginverse()

identity

public static Matrix identity(int rows)

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 Matrix transpose()

equals

public boolean equals(Matrix m,
 double tolerance)

isSquare

public boolean isSquare()

isSymmetric

public boolean isSymmetric(double tolerance)

minus

public Matrix minus(Matrix mb)

norm1

public double norm1()

plus

public Matrix plus(Matrix mb)

rank

public int rank()

rows

public int rows()

scalarMult

public Matrix scalarMult(double scalar)

sqrt

public Matrix sqrt()

sparseMatrix

public static Matrix sparseMatrix(int m,
 int n)

sum

public Vector sum(int direction)

zSum

public double zSum()

toString

public String toString()

Overrides:

toString in class Object

serializableInstance

public static Matrix serializableInstance()

Generates a simple exemplar of this class to test serialization.