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Re: Question about DurbinWatsonD

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Am 20.05.2011 12:37, schrieb Gilmar Rodriguez-pierluissi:
> 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
> 
Hi,

The option RegressionReport appears red in my Version (8.01) of Mathematica.

Are you sure you didn't want *Non*LinearModelFit (as x^2 is'nt linear at
all)??

In[1]:=
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}};

NonLinearModelFit[data,{1,x^2},x,RegressionReport->{DurbinWatsonD}]

Out[2]=
NonLinearModelFit[{{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}},{1,x^2},x,RegressionReport->{DurbinWatsonD}]

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Question about DurbinWatsonD Gilmar Rodriguez-pierluissi <peacenova@yahoo.com> - 2011-05-20 10:37 +0000
  Re: Question about DurbinWatsonD richard i pelletier <bitbucket@comcast.net> - 2011-05-21 10:46 +0000
  Re: Question about DurbinWatsonD Peter Pein <petsie@dordos.net> - 2011-05-21 10:49 +0000

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