Re: [R] Reading biplot function's source code

From: Gavin Simpson <gavin.simpson_at_ucl.ac.uk>
Date: Sat 04 Jun 2005 - 01:10:35 EST

Hector Villalobos Ortiz wrote:
> Hi everybody,
>
> Excuse me for this silly question, but after searching the help archives
> I'm still unable to find my way to read the source code of the "biplot"
> function in R.
>
> I have installed the mvbutils package, and tried:
>

>> fixr(biplot)

>
>
> which only gives me:
>
> function (x, ...)
> UseMethod("biplot")
>
> with no further details....
>
> I'd like to read the code to see if it is possible to display arrows
> only for some "significant" variables to avoid cluttering. Thank you in
> advance.
>

That is the code for biplot()! biplot() is a generic function, and biplot methods can be written to draw biplots of results produced by different functions.

 > methods(biplot)
[1] biplot.default* biplot.prcomp* biplot.princomp*

Shows us that currently there are 3 methods for biplot in my environment. The * indicates that the code for those methods are not visible to users directly.

getAnywhere(biplot.prcomp) is one way of viewing the code.

HTH Gav

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Gavin Simpson                     [T] +44 (0)20 7679 5522
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Received on Sat Jun 04 01:25:20 2005

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