[HAMA-905] Fix Pi Estimator Example

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.6.4
• Fix Version/s: 0.7.0
• Component/s: examples
• Labels: example pi_example
• Assignee: Martin Illecker
• Reporter: Martin Illecker
• Created: 19/May/14 14:14
• Updated: 27/May/14 00:28
• Resolved: 23/May/14 09:38

Description

Fix Pi Estimator Example

I think we should skip the sqrt method in [1] and change the if condition based on formula 6 on page 2 in [2].

IF (x^2 + y^2 <= 1) THEN
 SUM = SUM +1
END IF

Because the Equation of the Circle is

x^2 + y^2 = r^2
x^2 + y^2 = 1 (with r=1 in unit circle)
-> (x^2 + y^2 <= 1)

Thanks!

[1] https://github.com/apache/hama/blob/trunk/examples/src/main/java/org/apache/hama/examples/PiEstimator.java#L62-64
[2] http://arxiv.org/pdf/1404.1499v2.pdf