Re: Question about DurbinWatsonD
- To: mathgroup at smc.vnet.net
- Subject: [mg119094] Re: Question about DurbinWatsonD
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Sat, 21 May 2011 06:50:49 -0400 (EDT)
>From More Information for LinearModelFit:
LinearModelFit returns a symbolic FittedModel object to represent the linear model it constructs.The properties and diagnostics of the model can be obtained from model["property"]
data = {{0.05, 90}, {0.09, 95}, {0.14, 110}, {0.17, 125}, {0.2, 140}, {0.21,
150}, {0.23, 175}, {0.25, 190}, {0.3, 210}, {0.35, 255}};
LinearModelFit[data, {1, x^2}, x]["DurbinWatsonD"]
1.14
Bob Hanlon
---- Gilmar Rodriguez-pierluissi <peacenova at yahoo.com> wrote:
=============
In:
http://reference.wolfram.com/mathematica/RegressionCommon/ref/DurbinWatsonD.html
it says that:
"As of Version 7.0, DurbinWatsonD has become a property of LinearModelFit".
But, when I evaluate:
data = {{0.05, 90}, {0.09, 95}, {0.14, 110}, {0.17, 125}, {0.2, 140}, {0.21, 150}, {0.23, 175}, {0.25, 190}, {0.3, 210}, {0.35, 255}};
LinearModelFit[data, {1, x^2}, x, RegressionReport -> {DurbinWatsonD}]
the above line will not produce the DurbinWatsonD value of 1.14 shown in the example on that web page.
How can I then get the DurbinWatsonD value?
Thank you!
Gilmar Rodriguez Pierluissi