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Groups > comp.graphics.apps.gnuplot > #1040

Re: two regression curves for two ranges of the same data set on the same chart

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On 13.04.2012 14:23, TonyG wrote:

> You've got that right--but do you have to embarrass me publicly and
> say it aloud?  ;-)

Have to --- no.  But then again you publicly accused gnuplot of not 
understanding things, so considered it only just to return the favour ;-)

> Is the simplified syntax that you used to fit two regression
> expressions in a single line  (fit f(x) via a, b, a1, b1) a feature
> documented anywhere in the gnuplot Help files or examples, or is it
> simply the use of a C conditional?

The feature is independent of 'fit'.  See "help fit multi-branch" and 
"help ternary".

> I've been looking for such
> examples, but to no avail.

Hmmm.... what about the one titled 'fitted to realistic model function' 
in fit.dem, part of the official demo collection that came right with 
the program?

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two regression curves for two ranges of the same data set on the same chart TonyG <tgozdz@gmail.com> - 2012-04-12 13:50 -0700
  Re: two regression curves for two ranges of the same data set on the same chart Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2012-04-13 00:42 +0200
    Re: two regression curves for two ranges of the same data set on the same chart TonyG <tgozdz@gmail.com> - 2012-04-13 05:23 -0700
      Re: two regression curves for two ranges of the same data set on the   same chart Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2012-04-13 20:37 +0200

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