[R] Help Help!
Prof Brian D Ripley
ripley at stats.ox.ac.uk
Fri Feb 11 08:01:44 CET 2000
On Thu, 10 Feb 2000, Kelvin Lam wrote:
> Hello! I have two questions.
> First of all, I have a problem dealing with acf
> (Autocovariance function) and need help. First I
> defined a time series, x, which is a vector created by
> x <- ts(rnorm(200)). So I plugged the series directly
> into the acf function, acf(x) and an error message
> popped up as:
> Error in .C("acf", as.double(x), as.integer(sampleT),
> as.integer(nser), : C/Fortran function name not in
> load table
> I downloaded R to my PC and am thinking if it's
> anything to do with the operating system. Please help
> me out!
Look at ?bug.report to find out how to send a bug report with the
information we need, like the version of R in use.
Let me check one thing. You did do library(ts) and got no
error messages? Your example does work in a proper install of
rw0901 (if you have Windows on your PC, that is).
> The second question is about arima simulation. I have
> an AR and MA process and need to simulate 200
> observations from these two models. Don't know how to
Look at the example in ?filter in library(ts). That will
almost certainly not work if acf does not, though.
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
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