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Subject: [OASIS Issue Tracker] (OFFICE-3936) logarithmic scale misses information about basis


    [ https://issues.oasis-open.org/browse/OFFICE-3936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=67867#comment-67867 ] 

Andreas Guelzow commented on OFFICE-3936:
-----------------------------------------

In Gnumeric:

 chart:minimum="2"
 chart:maximum="2048"
 chart:interval-major="0.602059991327962" [= log10(4)]
 chart:interval-minor-divisor="4" 

yields major ticks at 4, 16, 64, ...

 chart:minimum="0.1"
 chart:maximum="2048"
 chart:interval-major="0.602059991327962" [= log10(4)]
 chart:interval-minor-divisor="4" 

yields ticks 0.25, 1, 4, 16, 64,...


> logarithmic scale misses information about basis
> ------------------------------------------------
>
>                 Key: OFFICE-3936
>                 URL: https://issues.oasis-open.org/browse/OFFICE-3936
>             Project: OASIS Open Document Format for Office Applications (OpenDocument) TC
>          Issue Type: Improvement
>          Components: Chart
>    Affects Versions: ODF 1.2
>            Reporter: Regina Henschel
>             Fix For: ODF 1.3
>
>
> http://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part1.html#property-chart_interval-major
> Although the basis 10 is widely used, others a common too, e.g basis 2 for audiogram.
> This proposal adds not only the basis but additional details to the description of chart:interval-major and chart:interval-minor-division.
> Specifications are not only read by developers but by authors of guides and tutorials too. For those the mathematic impact of the attributes values might be not obvious.
> Formulas in the proposal are written StarMath.
> I think, that logarithmic scale should only be allowed for a value-axis, but have not included that in this proposal.



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