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Re: How to get Correlation factor?

From: Paul Kienzle
Subject: Re: How to get Correlation factor?
Date: Fri, 17 Jan 2003 05:15:51 -0500
User-agent: Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.2.1) Gecko/20021130

ASG wrote:

I have two-dimensional data, which I want to fit with a linear regression. I get nice results with
[p, yf] = polyfit (x, y, 2)

And now I need the correlation factor...
Is there a nice way to calculate this?

It would be also quite good, if anybody knows how to calculate the MSWD (Mean Square Weighted Deviation) for a linear regression?

octave-forge/main/optim ( has wpolyfit to do a weighted polynomial fit. It also
returns an error estimate for the parameters.

Paul Kienzle

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