On Feb 14, 2014, at 11:04 PM, Gene Leynes wrote:
> How can I see the code for boxcox.default?
http://cran.r-project.org/doc/Rnews/Rnews_2006-4.pdf
>
>> library(MASS)
>> boxcox.default
> Error: object 'boxcox.default' not found
>>
>
> [[alternative HTML version deleted]]
Please learn t
How can I see the code for boxcox.default?
> library(MASS)
> boxcox.default
Error: object 'boxcox.default' not found
>
[[alternative HTML version deleted]]
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PLEASE
On Fri, Feb 14, 2014 at 7:38 PM, Bert Gunter wrote:
> However, note that I DID get it WRONG:
>
> The method invoked by the NextMethod() call in the boxcox.formula
> method is boxcox.default, NOT boxcox.lm.
>
>
The method chain is slightly unusual here, because of the liberal way S3
objects are de
I found some good explanations of what the Box Cox transform for anyone who
happens upon this thread while searching for boxcox details:
This is the best explanation I found of what how the Box Cox transformation
is calculated. It explains why QR decomposition is used, has nice code
examples that
In searching for NextMethod on http://www.rseek.org/ I found some helpful
tutorials on S3 and S4 methods.
Between your answer and the tutorials, I think I'm starting to understand.
The NextMethod is just a dispatcher type of thing that doesn't do anything
directly.
I think you're saying that whe
Yes I read the help on NextMethod. In fact, since people frequently
respond with "did you read the help" I mentioned that I had read the help
in my original post. I'm very grateful for the time and effort that people
put into answering questions, so I always try to answer the question myself
firs
However, note that I DID get it WRONG:
The method invoked by the NextMethod() call in the boxcox.formula
method is boxcox.default, NOT boxcox.lm.
Cheers,
Bert
Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374
"Data is not information. Information is not knowledge. And knowledge
i
Inline.
Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374
"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
H. Gilbert Welch
On Fri, Feb 14, 2014 at 4:19 PM, Gene Leynes wrote:
> In searching for NextMethod on http://www.rseek.org/ I
Well, since this is really a question about understanding how S3
methods work, and this is not the place for a tutorial, I think what
you need to do is search out a tutorial that you understand.
But very briefly, it does what it says. The "object" argument is
supplied to the boxcox generic; lm() t
Have you tried:
?NextMethod
?
-- Bert
Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374
"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
H. Gilbert Welch
On Thu, Feb 13, 2014 at 2:17 PM, Gene Leynes wrote:
> I was trying to under
I was trying to understand the boxcox function in MASS to get a better
understanding of where and how the log-Likelihood values are calculated.
By using "debug(boxcox)" I found this code while running the examples:
> m <- length(lambda)
> object <- lm(object, y = TRUE, qr = TRUE, ...)
>
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