[R] Question regarding Principle Component Analysis and R for Windows

[Prof Brian Ripley]

On Thu, 29 Mar 2001 Marcusdahl at aol.com wrote:

> Hi there,
>
> I am a post-grad (Arts!) student trying to get to grips with R...
>
> Though I am not statistically trained my research involves working with a
> large amount of numerical data currently held in Excel. I have been told by a
> Stats trained advisor that I should examine my data by some sort of
> Pricincipal Component Analysis.
>
> My questions then are (all apologies if they seem simple but I am neither a
> programmer nor a mathematician)...
>
> (1) Is there a way of moving all my data over from Excel into an R workspace
> or data folder.

Several. See the R Data Import/Export Manual. The simplest is to save as
csv files and import by read.csv, the adventurous is to use package RODBC.

> (2) If I can get my data in R how do I start going about applying a
> priincipal component analysis to that data ( I have downloaded the PCA
> package from Professor Ripley's site)

Eh?  PCA is part of package mva in base R, in function princomp (and
prcomp).  There is no PCA package on my site that I am aware of.

> (3) Is the 3D graphing package compatable with the PCA (mulivariate) package?

Sorry, which two packages do you mean?  (Exact names and version numbers,
preferably.)

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._