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[Octave-bug-tracker] [bug #34567] Ridges in smooth plot
From: |
Peter Jeffris |
Subject: |
[Octave-bug-tracker] [bug #34567] Ridges in smooth plot |
Date: |
Sun, 16 Oct 2011 22:12:24 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux i686; rv:7.0.1) Gecko/20100101 Firefox/7.0.1 |
URL:
<http://savannah.gnu.org/bugs/?34567>
Summary: Ridges in smooth plot
Project: GNU Octave
Submitted by: jeffris
Submitted on: Sun 16 Oct 2011 10:12:23 PM GMT
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Inaccurate Result
Status: None
Assigned to: None
Originator Name: peter
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 3.2.4
Operating System: GNU/Linux
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Details:
When ploting ridges appear either above or below the surface which I'm pretty
confident should be smooth. The sign reflects where the slope is increasing
or decreasing and they seem to follow the line y=x.
octave:22> [x,y] = meshgrid(-2*pi:.2:2*pi);
octave:23> z = e**(x).*cos(y)
octave:24> surf(x,y,z)
Increasing the size of the polygons does not help
octave:28> [x,y] = meshgrid(-2*pi:1:2*pi);
octave:29> z = e**(x).*cos(y);
octave:30> surf(x,y,z)
but another bug shows up where the tiles in the middle do not stay opaque when
viewed from certain angles.
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?34567>
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- [Octave-bug-tracker] [bug #34567] Ridges in smooth plot,
Peter Jeffris <=