[R] (1) arima.mle implementation; (2) r-newbie forum

Barry Cooke bcooke at gpu.srv.ualberta.ca
Sun Apr 9 17:44:30 CEST 2000


Has arima.mle (MASS, Ch.15, p.464) been implemented in R?

[A search through contributed packages and R-FAQ suggests not,
and I don't think function 'lme' from package 'nlme' would
accomplish the same sort of thing, although it permits
correlated errors.  A search of the CRAN site shows this 
question has been asked some time ago, and it was suggested
that Paul Gilbert's DSE library might offer comparable 
functions.  Is this the way to go?]

Using R 1.0.0 for Win9x. Moving to Linux in September :)

Incidentally, R is great, and so is this forum.  As the user
base is expanding, it might be a good idea to start a second
help forum where newbies can discuss "stupid questions" amongst
ourselves.  I think there are alot more R-related questions out
there than are currently being asked.  And even now many of
the questions being posted have as much to do with the use of
statistics as with the use of R proper.  Having another
forum (r-newuser? r-statshelp?) might free up core team members
from having to answer those trivial questions that experienced
users can easily handle and questions that are only tangentially
related to R.

[For example I would like to know, but am hesitant to ask:
1. How does one interpret the confidence limits computed by
spec.pgram and automatically plotted by plot.spec?
2. What is the most elegant way to generate a vector of
correlated random numbers of arbitrary distribution, mean, 
variance and correlation structure? (eg. pink noise).]

Sincerely,

Barry J. Cooke                      Current mailing address:
Ph.D. Candidate                     #219 - 1810 NW 23 Blvd 
Environmental Biology and Ecology   Gainesville, Florida, USA 
Department of Biological Sciences   32605 
University of Alberta
Edmonton, AB, T6G 2E9               http://www.ualberta.ca/~bcooke 
bcooke at gpu.srv.ualberta.ca

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