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Groups > comp.graphics.apps.gnuplot > #3663
| Newsgroups | comp.graphics.apps.gnuplot |
|---|---|
| Date | 2017-06-03 12:49 -0700 |
| References | <ac6rb8.ur8.19.1@isomedia.com> <b30f5dfe-333f-4a47-b61e-ab6e6b0a96fc@googlegroups.com> <ogr70t$1b2$1@solani.org> <022e551d-f7c4-44a1-973b-f8db0375854b@googlegroups.com> <ogrdkh$4tc$1@solani.org> |
| Message-ID | <ec3a75fe-478f-458a-a42d-4629c2cf45a5@googlegroups.com> (permalink) |
| Subject | Re: What's new in gnuplot 5.2 |
| From | "hugocoolens@gmail.com" <hugocoolens@gmail.com> |
Op vrijdag 2 juni 2017 12:11:32 UTC+2 schreef Karl Ratzsch: > Am 02.06.2017 um 11:32 schrieb hugocoolens@gmail.com: > > > I understand the problem but even giving good starting values thus not always help. In fact I most of the time just want to have a parameter "b" strictly positive, I tried to circumvent Gnuplot making it negative by substituting it by an always positive exp(b), but this is not really an advisable practice and just being able to tell Gnuplot to keep it always positive would be great. > > Just out of curiosity, what is the function you try to fit? this is one example: f(x)=20*log10(a/(1+(x/b)**2)**0.5) a should be positive but sometimes Gnuplot makes it negative kind regards, Hugo
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What's new in gnuplot 5.2 Raoul Fleckman <raoul.fleckman@gmail.com> - 2017-05-26 21:13 +0000
Re: What's new in gnuplot 5.2 "hugocoolens@gmail.com" <hugocoolens@gmail.com> - 2017-05-31 23:16 -0700
Re: What's new in gnuplot 5.2 Karl Ratzsch <mail.kfr@gmx.net> - 2017-06-02 10:18 +0200
Re: What's new in gnuplot 5.2 "hugocoolens@gmail.com" <hugocoolens@gmail.com> - 2017-06-02 02:32 -0700
Re: What's new in gnuplot 5.2 Karl Ratzsch <mail.kfr@gmx.net> - 2017-06-02 12:11 +0200
Re: What's new in gnuplot 5.2 "hugocoolens@gmail.com" <hugocoolens@gmail.com> - 2017-06-03 12:49 -0700
Re: What's new in gnuplot 5.2 Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2017-06-03 22:45 +0200
Re: What's new in gnuplot 5.2 "hugocoolens@gmail.com" <hugocoolens@gmail.com> - 2017-06-05 01:32 -0700
Re: What's new in gnuplot 5.2 Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2017-06-05 14:47 +0200
Re: What's new in gnuplot 5.2 "hugocoolens@gmail.com" <hugocoolens@gmail.com> - 2017-06-06 23:34 -0700
Re: What's new in gnuplot 5.2 Dr Engelbert Buxbaum <engelbert_buxbaum@hotmail.com> - 2017-06-07 14:26 +0200
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