org.apache.giraph.utils

Class MathUtils

java.lang.Object

org.apache.giraph.utils.MathUtils

public class MathUtils
extends Object

A helper class for math related operations with writables

Method Summary

Modifier and Type	Method and Description
static double	sum(Iterable<org.apache.hadoop.io.DoubleWritable> values) Sums up a sequence of double values
static double	sum(Iterator<org.apache.hadoop.io.DoubleWritable> values) Sums up a sequence of double values

Methods inherited from class java.lang.Object

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

Method Detail

sum

public static double sum(Iterable<org.apache.hadoop.io.DoubleWritable> values)

Sums up a sequence of double values

Parameters:

values - double values

Returns:

sum of double values

sum

public static double sum(Iterator<org.apache.hadoop.io.DoubleWritable> values)

Sums up a sequence of double values

Parameters:

values - double values

Returns:

sum of double values