From help-octave-request at bevo dot che dot wisc dot edu Tue Feb  4 07:02:29 2003
Subject: Re: 3d plotting, griddata and deluanayn
From: Etienne Grossmann <etienne at isr dot isr dot ist dot utl dot pt>
To: Andrass Ziska Davidsen <c960334 at student dot dtu dot dk>
Cc: help-octave at bevo dot che dot wisc dot edu,    Etienne Grossmann <etienne@isr.isr.ist.utl.pt>
Date: Tue, 4 Feb 2003 13:05:40 +0000

On Mon, Feb 03, 2003 at 10:46:18PM +0100, Andrass Ziska Davidsen wrote:
# I have some points given by x, y and z coordinates (roughly 13000 points), 
# originating from some measured lines. The points are not measured on a 
# regular grid, which complicates plotting.

  Is there a 'natural' grid structure? I.e. are the 13000 points
arranged as a matrix, say 130x100, corresponding to a parameterized
surface? In that case, you could use the octave-forge function
vmesh().

  I just improved the speed of this function (on octave-forge
CVS). Viewing a 100x100 surface takes ~10 secs on a PII/350MHZ.

  Hth,

  Etienne
 
# However, I have found a function called griddata, which seems to do what I 
# want, but it in turn uses the function delaunayn, which I do not have. I have 
# managed to find a cc file on the repoitory, bit I do not know how to compile 
# it.
# 
# Could someone please shed some light on this matter.
# 
# regards
# andrass
# -- 
# Andrass Ziska Davidsen
# c960334 at student dot dtu dot dk
# DTU-stud.no.: c9603343

-- 
Etienne Grossmann ------ http://www.isr.ist.utl.pt/~etienne



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