cern.jet.math.tlong

Class LongPlusMultFirst

java.lang.Object

cern.jet.math.tlong.LongPlusMultFirst

All Implemented Interfaces:

LongLongFunction

public final class LongPlusMultFirst
extends java.lang.Object
implements LongLongFunction

Only for performance tuning of compute longensive 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. Longended to be passed to matrix.assign(otherMatrix,function) methods.

Field Summary

Fields

Modifier and Type	Field and Description
long	multiplicator Public read/write access to avoid frequent object construction.

Method Summary

Modifier and Type	Method and Description
long	apply(long a, long b) Returns the result of the function evaluation.
static LongPlusMultFirst	minusMult(long constant) a - b*constant.
static LongPlusMultFirst	plusMult(long constant) a + b*constant.

Methods inherited from class java.lang.Object

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

Field Detail

multiplicator

public long multiplicator

Public read/write access to avoid frequent object construction.

Method Detail

apply

public final long apply(long a,
                        long b)

Returns the result of the function evaluation.

Specified by:

apply in interface LongLongFunction

Parameters:

a - the first argument passed to the function.

b - the second argument passed to the function.

Returns:

the result of the function.

minusMult

public static LongPlusMultFirst minusMult(long constant)

a - b*constant.

plusMult

public static LongPlusMultFirst plusMult(long constant)

a + b*constant.