[OASIS Issue Tracker] Commented: (OFFICE-3731) Public Comment: polynomial regression curve in charts

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

    [ http://tools.oasis-open.org/issues/browse/OFFICE-3731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=30688#action_30688 ] 

Andreas Guelzow  commented on OFFICE-3731:
------------------------------------------

Gnumeric is currently saving polynomial regression info into ODF files using foreign elements, eg.:
      <style:chart-properties chart:regression-type="gnm:polynomial" gnm:regression-polynomial-dims="2" gnm:regression-affine="true" chart:lines="true"/>

Note that specifying a minimum degree as suggested in the proposal attached to the message would destroy any chance of a unique regression curve. (For example for data that lies on a straight line there is no unique best fit truly quadratic regression.)

> Public Comment: polynomial regression curve in charts
> -----------------------------------------------------
>
>                 Key: OFFICE-3731
>                 URL: http://tools.oasis-open.org/issues/browse/OFFICE-3731
>             Project: OASIS Open Document Format for Office Applications (OpenDocument) TC
>          Issue Type: Bug
>          Components: Chart
>    Affects Versions: ODF 1.2
>            Reporter: Robert Weir 
>            Assignee: Andreas Guelzow 
>
> Copied from office-comment list
> Original author: Regina Henschel <rb.henschel@t-online.de> 
> Original date: 2011 11:42:56 -0800 (PST)
> Original URL: http://lists.oasis-open.org/archives/office-comment/201111/msg00001.html

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