bugGNU Octave - Bugs: bug #39642, flat shading on pcolor draws...


bug #39642: flat shading on pcolor draws pcolor above other plots

Submitted by:  None
Submitted on:  Thu 01 Aug 2013 12:41:55 PM UTC  
Category: Plotting with gnuplotSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Incorrect Result
Status: ConfirmedAssigned to: None
Originator Name: Originator Email: -unavailable-
Open/Closed: OpenRelease: dev
Operating System: GNU/Linux

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Thu 05 Sep 2013 03:03:36 AM UTC, comment #2:

I can confirm the described behavior on the development version of Octave as well with gnuplot 4.6.3. Using FLTK instead shows a consistent stacking order with either shading type.

This isn't really a regression in Octave but rather some change with different versions of gnuplot. I am not familiar enough with the Octave gnuplot interface to know whether this can be fixed or if it should be reported to gnuplot instead.

Mike Miller <mtmiller>
Project Administrator
Thu 01 Aug 2013 02:17:31 PM UTC, comment #1:

More investigations suggest this is a problem with gnuplot and/or gnuplot/octave interface.

The original bug report was with gnuplot Version: 4.4.3-0ubuntu3 in ununtu 12.04. Downgrading gnuplot to 4.2.6-1 (Lucid version) seems to avoid this bug.

Downgrading also avoids another bug I've just noticed where there are horizontal and vertical lines in pcolor plots (misalignment or inaccuracy) written to png format.

Thu 01 Aug 2013 12:41:55 PM UTC, original submission:


appears ok, but

draws the pcolor above the other plots. The order of the axis children doesn't change during this.



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    Date Changed By Updated Field Previous Value => Replaced By
    Thu 05 Sep 2013 03:03:36 AM UTCmtmillerItem GroupRegression=>Incorrect Result

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