com.numericalmethod.suanshu.algebra.linear.matrix.doubles.operation

Class VariancebtX

java.lang.Object

java.lang.Number

com.numericalmethod.suanshu.number.Real

com.numericalmethod.suanshu.algebra.linear.matrix.doubles.operation.VariancebtX

All Implemented Interfaces:

AbelianGroup<Real>, Field<Real>, Monoid<Real>, Ring<Real>, Serializable, Comparable<Real>

public class VariancebtX
extends Real

Computes \(b'Xb\).

See Also:

Wikipedia: Which matrices are covariance matrices?, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.numericalmethod.suanshu.algebra.structure.Field

Field.InverseNonExistent

Field Summary

Fields inherited from class com.numericalmethod.suanshu.number.Real

ONE, ZERO

Constructor Summary

Constructors

Constructor and Description
VariancebtX(Vector b, Matrix X) Computes \(b'Xb\).

Method Summary

Methods inherited from class com.numericalmethod.suanshu.number.Real

add, compareTo, divide, divide, doubleValue, equals, floatValue, hashCode, intValue, inverse, longValue, minus, multiply, ONE, opposite, toBigDecimal, toString, ZERO

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

VariancebtX

public VariancebtX(Vector b,
                   Matrix X)

Computes \(b'Xb\).

Parameters:

b - a vector

X - a matrix