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From "Aleksei Dievskii (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MATH-1037) Distribution tests are mostly meaningless due to high tolerance
Date Thu, 26 Sep 2013 14:48:02 GMT

     [ https://issues.apache.org/jira/browse/MATH-1037?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aleksei Dievskii updated MATH-1037:
-----------------------------------

    Summary: Distribution tests are mostly meaningless due to high tolerance  (was: Distribution
tests are mostly meaningful due to high tolerance)
    
> Distribution tests are mostly meaningless due to high tolerance
> ---------------------------------------------------------------
>
>                 Key: MATH-1037
>                 URL: https://issues.apache.org/jira/browse/MATH-1037
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.2
>            Reporter: Aleksei Dievskii
>            Priority: Minor
>
> The tolerance used for value comparison in {{IntegerDistributionAbstractTest}} is {{1E-4}}.
However, most values being compared are much smaller, so they are considered equal even if
they otherwise differ by orders of magnitude. For example, a typo in {{GeometricDistributionTest}}
puts 29 in the test points instead of 19, while the test probability value is correctly given
for 19. The test passes, disregarding the fact that {{2.437439e-05}} (test value for 19) and
{{1.473826e-07}} (actual value for 29) differ almost hundredfold.

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