bugGNU Octave - Bugs: bug #60243, plot axis rounding produces...

 
 

bug #60243: plot axis rounding produces unusable plot image

Submitter:  None
Submitted:  Tue 16 Mar 2021 12:44:43 PM UTC
   
 
Category:  Plotting Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  Duplicate Assigned to:  None
Originator Name:  Originator Email:  -email is unavailable-
Open/Closed:  * Closed Release:  * 6.2.0
Operating System:  * Microsoft Windows Fixed Release:  None
Planned Release:  None
* Mandatory Fields

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Tue 16 Mar 2021 01:18:19 PM UTC, comment #1: 

This is the oldest known issue of opengl based graphics toolkits: bug #32980. Basically, this is a consequence of OpenGL using single precision arithmetic. See also bug #59418 about documenting the available workarounds (basically rescaling the data when it is possible, or using the gnuplot tookit) until this gets fixed.

Closing report as a duplicate.

 Pantxo Diribarne <pantxo>
Group Member
Tue 16 Mar 2021 12:44:43 PM UTC, original submission:  

When the plot range is small compared to the absolute value, the plot produces an incorrect image.

e.g.:
plot(740000+(1:100)/100000,1:100)

This is for example very noticable when plotting a function against a date number. If the plot axis range is limited to a few hours,we have a situation similar to the above example.

 Anonymous

 

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Depends on the following items
bugsOpenGL plotting backend uses single precision, not double (bug #32980, Confirmed)

Digest:
   bug dependencies.

Items that depend on this one: None found

 

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  • -email is unavailable- added by pantxo (Posted a comment)

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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2021-03-16 pantxo StatusNone Duplicate
        Open/ClosedOpen Closed
        Dependencies- Depends on bugs #32980

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