From graphics-request at octave dot org Mon Sep 26 07:29:04 2005
Subject:  Re: Octave plotter for 3D shading plots ?
From: JH <julien dot hillairet at onecert dot fr>
To: graphics at octave dot org
Date:  Mon, 26 Sep 2005 14:29:47 +0200

Petr Mikulik a écrit :
>> think the official plotter of octave is gnuplot. But in despites the
>> qualitys of gnuplot, it is not why I'm expecting, specially in 3D plots
>> and shading surfaces. I can't afford to obtain the same display-like
>> results of "mesh" that I had with matlab.
> 
> 
> Coloured filled surfaces work fine with the "with pm3d" mode. See 
> screenshots (demo) on gnuplot web page.
> 
> Further, surf(z) from octave-forge should work.
> 
Yes, it works, but it's pretty awful, green and red faceted plot.

>> (you can't "rotate" with the mouse the mesh you made)
> 
> 
> You can, it works for many years already. Please upgrade to gnuplot 4.0
> 
Sorry, I didn't know. But in fact, there must be a problem with my 
octave-gnuplot installation

in octave, the commands :

> GNU Octave, version 2.9.3 (i686-pc-linux-gnu).
...
> octave:1> system('gnuplot --version')
> gnuplot 4.0 patchlevel 0
> ans = 0
> octave:2> x = [-pi:.1:pi]; y = x; z = cos(x).' * sin(y);
> octave:3> surf(z)

The versions I used :

> octave:7> OCTAVE_VERSION 
> OCTAVE_VERSION = 2.9.3
> octave:8> OCTAVE_FORGE_VERSION 
> ans = 20050613



produce a gnuplot 3d figure, witch I can't rotate (my mouse seems 
doesn't make any effect to gnuplot). However, I try without octave, 
directly under gnuplot, and it works (I can rotate a figure) !

Is someone could explain me why ? It seems I had a bad 
install/configuration of octave.

Thanks

JH