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On Thu, 28 Jan 2010 15:12:20 +0100, Stefan Nowy <snowy.mail@gmx.net> wrote: >Hello! > >I'm trying to fit my data using a function like > >f1(x)=a+b*x+c*x**2 > >However, b is determined by the fitting algortithm to be negative. But >it must be a positive number (due to the physical model). Can I somehow >define that b>=0? You can enforce a positive b by writing b = exp(d) or b = d**2     

Group: comp.graphics.apps.gnuplot · Group Profile · Search for Paramter in comp.graphics.apps.gnuplot
Author: Dan Luecking
Date: Jan 28, 2010 11:24

> Torsten Hennig <Torsten.Hennig@umsicht.fhg.de> wrote in message <1213454180.60728.1264608502660.JavaMail.root@gallium. mathforum.org>... Torsten Hennig <Torsten.Hennig@umsicht.fhg.de> wrote in message <195036307.52752.1264509244815.JavaMail.root@gallium.m athforum.org>... Torsten Hennig <Torsten.Hennig@umsicht.fhg.de> wrote
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> Otto Hirr: > > In answer to my question, and so others don't have to > > trudge thru the source to find it... > > > > The 'parameter name' may be and non-space, non-equals (i.e. =) > > string of characters. > > The fine details are not documented, because I didn't want to promise > that Postfix will forever support names with ^A<ESC>^Z<CR> in them, > nor did I want to add code that artificially     

Group: comp.softsys.matlab · Group Profile · Search for Paramter in comp.softsys.matlab
Author: Torsten Hennig
Date: Jan 29, 2010 00:01

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Group: mailing.postfix.users · Group Profile · Search for Paramter in mailing.postfix.users
Author: "Otto Hirr"
Date: Jan 28, 2010 16:04

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