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Posted to issues@commons.apache.org by "Fawaz Alhenaki (Jira)" <ji...@apache.org> on 2020/02/11 20:04:00 UTC

[jira] [Updated] (MATH-1514) IRR NaN When it should give back a value

     [ https://issues.apache.org/jira/browse/MATH-1514?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fawaz Alhenaki updated MATH-1514:
---------------------------------
    Attachment:     (was: TestIrr.java)

> IRR NaN When it should give back a value
> ----------------------------------------
>
>                 Key: MATH-1514
>                 URL: https://issues.apache.org/jira/browse/MATH-1514
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.6
>            Reporter: Fawaz Alhenaki
>            Priority: Minor
>
> I have created a sample of when the issue occurs. IRR in apache documentation says that covers "20 tries" as shown here [https://poi.apache.org/apidocs/dev/org/apache/poi/ss/formula/functions/Irr.html] 
> which is identical to Microsoft Excel [https://support.office.com/en-us/article/irr-function-64925eaa-9988-495b-b290-3ad0c163c1bc]
> This indicate that the result is the same between the two; however, in the case of apache poi, it seems that the result is returned as NaN (while excel returns the actual result).



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