ing a control variable, is equivalent for this
example. I have not decided how I feel about that yet, but I do have a
splitting headache.
Sincerely,
KeithC.
-Original Message-
From: Peter Ehlers [mailto:ehl...@ucalgary.ca]
Sent: Sunday, February 14, 2010 10:04 PM
To: kMan
Cc: r-help@
example. I have not decided how I feel about that yet, but I do have a
splitting headache.
Sincerely,
KeithC.
-Original Message-
From: Peter Ehlers [mailto:ehl...@ucalgary.ca]
Sent: Sunday, February 14, 2010 10:04 PM
To: kMan
Cc: r-help@r-project.org
Subject: Re: [R] Plot differe
;t base any important
decisions on the results of the fit.
Cheers,
-Peter Ehlers
-Original Message-
From: Peter Ehlers [mailto:ehl...@ucalgary.ca]
Sent: Sunday, February 14, 2010 6:49 PM
To: kMan
Cc: 'David Winsemius'; 'Rhonda Reidy'; r-help@r-project.org
Subject: Re: [R]
the way?
>
> KeithC.
>
> -Original Message-
> From: Peter Ehlers [mailto:ehl...@ucalgary.ca]
> Sent: Saturday, February 13, 2010 1:35 PM
> To: David Winsemius
> Cc: Rhonda Reidy; r-help@r-project.org
> Subject: Re: [R] Plot different regression models on one gr
rs [mailto:ehl...@ucalgary.ca]
Sent: Saturday, February 13, 2010 1:35 PM
To: David Winsemius
Cc: Rhonda Reidy; r-help@r-project.org
Subject: Re: [R] Plot different regression models on one graph
Rhonda:
As David points out, a cubic fit is rather speculative. I think that one
needs to distinguish two
Dear Rhonda,
Consider curve().
KeithC.
-Original Message-
From: Rhonda Reidy [mailto:rre...@gmail.com]
Sent: Saturday, February 13, 2010 11:36 AM
To: r-help@r-project.org
Subject: [R] Plot different regression models on one graph
The following variables have the following significant
5 PM
To: David Winsemius
Cc: Rhonda Reidy; r-help@r-project.org
Subject: Re: [R] Plot different regression models on one graph
Rhonda:
As David points out, a cubic fit is rather speculative. I think that one
needs to distinguish two situations: 1) theoretical justification for a
cubic model is available
ical Statistics
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Peter Ehlers
Sent: Saturday, February 13, 2010 12:35 PM
To: David Winsemius
Cc: Rhonda Reidy; r-help@r-project.org
Subject: Re: [R] Plot different regression models on one graph
Rh
Rhonda:
As David points out, a cubic fit is rather speculative. I think that
one needs to distinguish two situations: 1) theoretical justification
for a cubic model is available, or 2) you're dredging the data for
the "best" fit. Your case is the second. That puts you in the realm
of EDA (explora
On Feb 13, 2010, at 1:35 PM, Rhonda Reidy wrote:
The following variables have the following significant relationships
(x is the explanatory variable): linear, cubic, exponential,
logistic. The linear relationship plots without any trouble.
Cubic is the 'best' model, but it is not plotting
Rhonda Reidy wrote:
>
> The following variables have the following significant relationships (x is
> the explanatory variable): linear, cubic, exponential, logistic. The
> linear relationship plots without any trouble.
>
> Cubic is the 'best' model, but it is not plotting as a smooth curve usi
The following variables have the following significant relationships (x is the
explanatory variable): linear, cubic, exponential, logistic. The linear
relationship plots without any trouble.
Cubic is the 'best' model, but it is not plotting as a smooth curve using the
following code:
cubic.lm
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