Groups > comp.graphics.apps.gnuplot > #324

Re: Multible Fits using the same fit function lead to ?false? results.

Path	csiph.com!x330-a1.tempe.blueboxinc.net!feeder1.hal-mli.net!feeder.news-service.com!fu-berlin.de!uni-berlin.de!news.dfncis.de!not-for-mail
From	Hans-Bernhard Bröker <HBBroeker@t-online.de>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: Multible Fits using the same fit function lead to ?false? results.
Date	Thu, 19 May 2011 01:56:38 +0200
Lines	25
Message-ID	<93j4l3F5euU1@mid.dfncis.de> (permalink)
References	<836a279c-e42c-4304-a7a5-6dfd90ebe7df@hd10g2000vbb.googlegroups.com>
Mime-Version	1.0
Content-Type	text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding	8bit
X-Trace	news.dfncis.de LqHDvKYux+ce8toB3ZvKLwCXIobej50IKxrHlWZD4+9PifXeDm9g15ph2R
Cancel-Lock	sha1:+QKN7bAu2FltPnv+VBJpeeoQe3U=
User-Agent	Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.2.15) Gecko/20110303 Thunderbird/3.1.9
In-Reply-To	<836a279c-e42c-4304-a7a5-6dfd90ebe7df@hd10g2000vbb.googlegroups.com>
Xref	x330-a1.tempe.blueboxinc.net comp.graphics.apps.gnuplot:324

Show key headers only | View raw

On 18.05.2011 00:04, Oliver Götze wrote:
> Hi
> i just noticed that using a gnuplot script like this:
[...]
> on a table.dat file like this (just an example):
[...]
> leads to false results,

It's really hard to help you based on such a vague description.  What 
exactly do you think is "wrong" about those results?

> i have to reset (or set to zero) die
> coefficients a0, a1, a2 after/before every fit by placing
> a0=0
> a1=0
> a2=0

Don't do that.  Fit parameters should never be zero; particularly not 
the start-up values.

> If i do not do this the last values for the coefficients are taken
> into the next fit and this is influencing the results.

So what?

Back to comp.graphics.apps.gnuplot | Previous | Next — Previous in thread | Find similar

Thread

Multible Fits using the same fit function lead to ?false? results. Oliver Götze <goetze.oliver@googlemail.com> - 2011-05-17 15:04 -0700
  Re: Multible Fits using the same fit function lead to ?false? results. Christoph Bersch <usenet@bersch.net> - 2011-05-18 09:54 +0200
  Re: Multible Fits using the same fit function lead to ?false? results. Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2011-05-19 01:56 +0200

csiph-web