cern.jet.math.tlong
Class LongPlusMultFirst

java.lang.Object
  cern.jet.math.tlong.LongPlusMultFirst

All Implemented Interfaces:

LongLongFunction

public final class LongPlusMultFirst
extends 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

long	multiplicator Public read/write access to avoid frequent object construction.

Method Summary

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.