PlusMult (Colt 1.2.0 - API Specification)

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cern.jet.math
Class PlusMult

java.lang.Object
  cern.jet.math.PlusMult

All Implemented Interfaces:: DoubleDoubleFunction

public final class PlusMult
extends Object
implements DoubleDoubleFunction

Only for performance tuning of compute intensive linear algebraic computations. Constructs functions that return one of

a + b*constant
a - b*constant
a + b/constant
a - b/constant

a and b are variables, constant is fixed, but for performance reasons publicly accessible. Intended to be passed to matrix.assign(otherMatrix,function) methods.

Field Summary
`double`	`multiplicator` Public read/write access to avoid frequent object construction.

Method Summary
`double`	`apply(double a, double b)` Returns the result of the function evaluation.
`static PlusMult`	`minusDiv(double constant)` `a - b/constant`.
`static PlusMult`	`minusMult(double constant)` `a - b*constant`.
`static PlusMult`	`plusDiv(double constant)` `a + b/constant`.
`static PlusMult`	`plusMult(double constant)` `a + b*constant`.

Methods inherited from class java.lang.Object

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

Field Detail

multiplicator

public double multiplicator

Public read/write access to avoid frequent object construction.

Method Detail

apply

public final double apply(double a,
                          double b)

Returns the result of the function evaluation.

Specified by:: apply in interface DoubleDoubleFunction

Parameters:: a - the first argument passed to the function.; b - the second argument passed to the function.
Returns:: the result of the function.

minusDiv

public static PlusMult minusDiv(double constant)

a - b/constant.

minusMult

public static PlusMult minusMult(double constant)

a - b*constant.

plusDiv

public static PlusMult plusDiv(double constant)

a + b/constant.

plusMult

public static PlusMult plusMult(double constant)

a + b*constant.