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From: =?ISO-8859-1?Q?Hans-Bernhard_Br=F6ker?= <HBBroeker@t-online.de>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Correlation coefficient
Date: Sat, 11 Jun 2011 18:49:15 +0200
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On 11.06.2011 18:15, David Marçal wrote:

>   On gnuplot, when I make a fit linear, the log archive gives me a
> matrix of correlation instead of the correlation coefficent (R**2).

Depending on what exactly you mean by that R**2, it's very well possible 
that it doesn't appear anywhere in the process, or output, of gnuplot's 
"fit" command, because that operates in an entirely different way than 
the one you're used to getting that value from.

> How can I get correlation coefficient through the matrix of
> correlation?

The off-diagonal element in the matrix _is_ a coefficient of 
correlation.  Whether or not it's the one you're looking for depends on 
which of several meaning of that terms you're looking for.