Groups > comp.graphics.apps.gnuplot > #3316

Re: Gaussian fit - Singular matrix in Invert_RtR

From	boettcher@physik.uni-kiel.de (Stephan Böttcher)
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: Gaussian fit - Singular matrix in Invert_RtR
Date	2016-04-28 07:30 +0200
Organization	[posted via] Rechenzentrum der Universitaet Kiel, Germany
Message-ID	<s6n7ffinvuz.fsf@falbala.ieap.uni-kiel.de> (permalink)
References	<f2adc325-2828-4a1a-9bee-47e5afb8691f@googlegroups.com>

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Andrew Finlay <andrewlfinlay@gmail.com> writes:

> Contents of my data file (please note, the error values are the square
> root of the counts, but when this would be 0, I chose a value of
> 0.0001 to try to avoid issues):

0.0001 is too low, you weigh those bins to much. I usually do

 using 1:2:(sqrt($2+1))

Zero is quite probably for bins with expectation value 1

Stephan

-- 
Stephan Böttcher Tel: +49-431-880-2508
Extraterrestrische Physik, IEAP, Leibnizstr. 11, 24118 Kiel

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Gaussian fit - Singular matrix in Invert_RtR Andrew Finlay <andrewlfinlay@gmail.com> - 2016-04-27 10:38 -0700
  Re: Gaussian fit - Singular matrix in Invert_RtR Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2016-04-27 22:29 +0200
    Re: Gaussian fit - Singular matrix in Invert_RtR Andrew Finlay <andrewlfinlay@gmail.com> - 2016-04-27 14:20 -0700
      Re: Gaussian fit - Singular matrix in Invert_RtR Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2016-04-28 00:51 +0200
  Re: Gaussian fit - Singular matrix in Invert_RtR boettcher@physik.uni-kiel.de (Stephan Böttcher) - 2016-04-28 07:30 +0200

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