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Subject: RE: Curve fitting
From: Louise Erasmus (lerasmus@zoology.up.ac.za)
Date: mar fév 19 2002 - 10:49:21 CET
Hmmm... No, see I know tablecurve very well - it's just that I have 3 days
to do 6000 regression analyses - so I thought if I can let my computer do
it... Perhaps I might be able to finich in time...
Centre for Environmental Studies / Department of Zoology and Entomology
Geography Building 2-1
University of Pretoria
Pretoria
0002
Tel. +27-12-420 4048
Fax. +27-12-420 3210
http://www.up.ac.za/academic/centre-environmental-studies/
"Criticism comes easier than craftsmanship."
-Zeuxis
-----Original Message-----
From: RODA [mailto:jean-marc.roda@cirad.fr]
Sent: 19 February 2002 11:23
To: lerasmus@zoology.up.ac.za; cormas@cines.fr
Subject: Re: Curve fitting
Do you know the following softwares ?
=> Tablecurve 2D or Tablecurve 3D
=> Statistica
They are really convenient for curve fitting. Tablecurve is more adequate
for
an exploratory work, and Statistica is the best tool after SAS (almost the
same power, and fare more easy to use).
But wat is exactly your need ?
- Do you need to process separately but automaticly the same regression
equation for a great number of data sets, in order to get different
regression parameters for each set (which is called local regression, or
local modelling) ?
- Do you need to apply simultaneously the same regression to a great number
of data sets (which is called global regression, or global modelling) ?
- Do you need to test several regression equations for the same data set ?
- or something else ?
Depending your exact need, the different existing tools are more or less
adequate...
all the best,
Jean-Marc
Louise Erasmus a écrit :
> Hi everybody
>
> I need to do a number of regression analyses (curve fitting), but I don't
> want to do a heuristic search for each analysis. Can any one think of any
> short cuts?
>
> Best wishes
>
> Louise
>
> Centre for Environmental Studies / Department of Zoology and Entomology
> Geography Building 2-1
> University of Pretoria
> Pretoria
> 0002
>
> Tel. +27-12-420 4048
> Fax. +27-12-420 3210
>
> http://www.up.ac.za/academic/centre-environmental-studies/
>
> "Criticism comes easier than craftsmanship."
>
> -Zeuxis
-- Jean-Marc Roda Economie des produits forestiers // Forest products economics Programme Bois // Forest Products Programme CIRAD-Forêt - TA 10/16 - 73 rue J-F Breton 34398 Montpellier Cedex 5 - France Tel +33 (0)4 67 61 44 99 - Fax + 33 (0)4 67 61 57 25 e-mail jean-marc.roda@cirad.fr web http://www.cirad.fr/activites/bois/index.html http://www.cirad.fr/