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https://issues.apache.org/jira/browse/NUMBERS-163?focusedWorklogId=612296&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-612296
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ASF GitHub Bot logged work on NUMBERS-163:
------------------------------------------
Author: ASF GitHub Bot
Created on: 19/Jun/21 12:39
Start Date: 19/Jun/21 12:39
Worklog Time Spent: 10m
Work Description: coveralls commented on pull request #97:
URL: https://github.com/apache/commons-numbers/pull/97#issuecomment-864401053
[](https://coveralls.io/builds/40719389)
Coverage decreased (-0.007%) to 99.659% when pulling
**06a613d29c950acff30feb06ac95d54c0d5151ea on darkma773r:numbers-163-sum** into
**d4c00eb68544f3adf258d09ab2c7daf3feb1f8c3 on apache:master**.
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Issue Time Tracking
-------------------
Worklog Id: (was: 612296)
Time Spent: 1h 10m (was: 1h)
> Summation and LinearCombination Accumulators
> --------------------------------------------
>
> Key: NUMBERS-163
> URL: https://issues.apache.org/jira/browse/NUMBERS-163
> Project: Commons Numbers
> Issue Type: New Feature
> Reporter: Matt Juntunen
> Priority: Major
> Attachments: FMA.java, Sum.java
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> It would be useful to have simple accumulator classes in {{Summation}} and
> {{LinearCombination}} to perform extended precision operations on arbitrary
> collections of values without requiring conversion to {{double[]}}. Ex:
> {code:java}
> Summation.Accumulator sum= Summation.accumulator(1d);
> sum.add(x)
> .add(y)
> .add(z)
> .add(w);
> double sumResult = sum.get();
> LinearCombination.Accumulator comb = LinearCombination.accumulator(1d);
> comb.add(x, scale)
> .add(y, scale)
> .add(z, scale)
> .add(w, scale);
> double combResult = comb.get();
> {code}
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