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From: =?windows-1252?Q?Hans-Bernhard_Br=F6ker?= <HBBroeker@t-online.de>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Fit 3D Line to data
Date: Tue, 24 Feb 2015 20:16:09 +0100
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Am 23.02.2015 um 07:27 schrieb Erik Zweigle:
> I am trying to fit a line to the 4 data points shown below.

That's not a well-defined task, I'm afraid.  Fitting a line to a dataset 
is reasonably well-defined in 2D, but not in 3D.

> 377.4202, -345.5518, 2.1142
> 377.4201,	-345.5505, 2.5078
> 377.4206,	-345.556, 2.8359
> 377.4288, -345.5555, 3.2109
>
> I only seem to be able to plot a plane with poor fitting.

Of course.  Those points don't even lie on any plane, much less on a 
single line.