> -Mensaje original-
> De: Kjetil Halvorsen [mailto:kjetilbrinchmannhalvor...@gmail.com]
> Enviado el: jueves, 17 de marzo de 2011 16:19
> Para: Rubén Roa
> CC: Alexx Hardt; r-help@r-project.org
> Asunto: Re: [R] R² for non-linear model
>
> see inline.
>
>
Bert Gunter wrote:
>
> You can't. R^2 has no (consistent, sensible) meaning for nonlinear models.
> If you don't understand why not, get local help or do some reading.
>
There is no doubt that you are right, but Anna's question only shows that
she is sandwiched between reviewers/supervisors who
tion
Office: 703-983-2951 | thei...@mitre.org
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org
] On Behalf Of Anna Gretschel
Sent: Wednesday, March 16, 2011 2:09 PM
To: Bert Gunter
Cc: r-help@r-project.org
Subject: Re: [R] R² for non-linear mode
Rubén
-Original Message-
From: r-help-boun...@r-project.org on behalf of Alexx Hardt
Sent: Wed 3/16/2011 7:42 PM
To: r-help@r-project.org
Subject: Re: [R] R² for non-linear model
Am 16.03.2011 19:34, schrieb Anna Gretschel:
> Am 16.03.2011 19:21, schrieb Alexx Hardt:
>> And t
of parameters in the working model."
> A remarkable result.
>
> Rubén
>
> -Original Message-
> From: r-help-boun...@r-project.org on behalf of Alexx Hardt
> Sent: Wed 3/16/2011 7:42 PM
> To: r-help@r-project.org
> Subject: Re: [R] R² for non-linear model
>
del."
A remarkable result.
Rubén
-Original Message-
From: r-help-boun...@r-project.org on behalf of Alexx Hardt
Sent: Wed 3/16/2011 7:42 PM
To: r-help@r-project.org
Subject: Re: [R] R² for non-linear model
Am 16.03.2011 19:34, schrieb Anna Gretschel:
> Am 16.03.2011 19:21, sch
How about using the prediction accuracy or ROC curve if you have validation
data set?
On Wed, Mar 16, 2011 at 11:42 AM, Alexx Hardt wrote:
> Am 16.03.2011 19:34, schrieb Anna Gretschel:
>
>> Am 16.03.2011 19:21, schrieb Alexx Hardt:
>>
>> And to be on-topic: Anna, as far as I know anova's are
Am 16.03.2011 19:34, schrieb Anna Gretschel:
Am 16.03.2011 19:21, schrieb Alexx Hardt:
And to be on-topic: Anna, as far as I know anova's are only useful to
compare a submodel (e.g. with one less regressor) to another model.
thanks! i don't get it either what they mean by fortune...
It's an
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Anna Gretschel
Sent: Wednesday, March 16, 2011 2:09 PM
To: Bert Gunter
Cc: r-help@r-project.org
Subject: Re: [R] R² for non-linear model + comparing linear + non-linear models
Dear Bert,
so what
Am 16.03.2011 19:11, schrieb Joshua Wiley:
(Are fortunes determined by voting? There is precedence for seconding
desired fortunes at least)
Wait, what do you mean by fortune? Is there a
statistics-quote-package-something for the unix shell program 'fortune'
? If so, I want want want!
And
On Wed, Mar 16, 2011 at 10:54 AM, Bert Gunter wrote:
> Is there any way that this could be made into a fortune -- perhaps by
> omitting the poster's identity?
>
> "yes there are threads concidering this topic but they are all about the
> theory not about how to get the value of r^2 for a non-linea
Dear Bert,
so what can I do to obtain a goodness of fit for a non-linear model if
r² does not work?
And here comes my next question: is it apropriate to comopare a linear
and a non-linear model with anova()?
Thank you so much for answering,
Anna
Am 16.03.2011 18:54, schrieb Bert Gunter:
Is there any way that this could be made into a fortune -- perhaps by
omitting the poster's identity?
"yes there are threads concidering this topic but they are all about the
theory not about how to get the value of r^2 for a non-linear model in R."
:=)
Cheers,
Bert
Anna: I say this because you
Am 16.03.2011 18:19, schrieb Joshua Wiley:
Dear Anna,
What is your goal in obtaining a value for R^2 ? I believe it is not
provided for a non-linear model, because it does not make much sense.
It certainly will not have the same interpretation as in a linear
model, and all the ways it *could* b
You can't. R^2 has no (consistent, sensible) meaning for nonlinear
models. If you don't understand why not, get local help or do some
reading.
Cheers,
Bert
On Wed, Mar 16, 2011 at 9:53 AM, Anna Gretschel wrote:
> Dear List,
>
> how can I obtain the value of r suqared for a non-linear model? Fo
Am 16.03.2011 18:15, schrieb David Winsemius:
On Mar 16, 2011, at 12:53 PM, Anna Gretschel wrote:
Dear List,
how can I obtain the value of r suqared for a non-linear model? For
linear models it can be found in the summary() of the model but for
non-linear models I just don't know. Please help
Dear Anna,
What is your goal in obtaining a value for R^2 ? I believe it is not
provided for a non-linear model, because it does not make much sense.
It certainly will not have the same interpretation as in a linear
model, and all the ways it *could* be "defined" come with their own
sets of probl
On Mar 16, 2011, at 12:53 PM, Anna Gretschel wrote:
Dear List,
how can I obtain the value of r suqared for a non-linear model? For
linear models it can be found in the summary() of the model but for
non-linear models I just don't know. Please help!
You should do more searching. I can remembe
Dear List,
how can I obtain the value of r suqared for a non-linear model? For
linear models it can be found in the summary() of the model but for
non-linear models I just don't know. Please help!
Anna
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