True, but reading the supplied help is appropriate before contacting the 
maintainer.

Specifically,

help("ggfortify")

and click the link to the index and find the autoplot method in the list and 
follow that link. 

Or you can read the help for the "pam" function and discover that the class of 
the returned object is "pam" so you can use

?autoplot.pam

to go right to it. If the documentation doesn't answer your question you can 
communicate that to the maintainer.

You can also just enter

autoplot.pam

at the console and read the source code if it is written in R to see what 
calculations are being done.

On April 25, 2019 10:13:30 AM PDT, Bert Gunter <bgunter.4...@gmail.com> wrote:
>As I believe the posting guide notes, you may do better addressing
>questions about specialized packages to the package maintainers, who
>often
>do not monitor this list.
>
>Cheers,
>Bert Gunter
>
>"The trouble with having an open mind is that people keep coming along
>and
>sticking things into it."
>-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
>
>On Thu, Apr 25, 2019 at 9:29 AM manju moorthy
><manjumoorth...@gmail.com>
>wrote:
>
>> Iam using autoplot function from the ggfortify library. I saw that
>autoplot
>> gives the 1st two principal components. I am using autoplot to
>generate 1st
>> two principal components on a clustered object.
>> The usage is like :
>>
>> autoplot(pam(my_data[1:256], 3), label = TRUE, label.size = 4, frame
>=
>> TRUE, frame.type = 'norm')
>>
>> So here autoplot generates the principal components on the clustered
>> object. So can we actually call this a PCA plot? Also what is the
>algorithm
>> used by autoplot for generating principal components?
>>
>> Thanks in advance for the help.
>>
>>
>>
>> <
>>
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>> >
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>> www.avg.com
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>> >
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>>
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>>
>> ______________________________________________
>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
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>
>______________________________________________
>R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.

-- 
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