The problem is that tsdiag is a generic (the same in both packages),
and package TSA sets methods for it (and methods for classes in
package stats which has already registered methods).
stats:::tsdiag.Arima(model1)
ought to work (it does for me in your example), but please take with
up with the maintainer of package TSA.
(I would be inclined to copy out of package TSA the parts your want
and not load the rest.)
On Thu, 5 Mar 2009, Richard Saba wrote:
The "tsdiag" function in the TSA package overrides the "tsdiag" function in
the "stats" package. There are a few annoying bugs in the TSA's version of
the function so I would like to use the "stats" function but still have
access to other TSA functions. I have tried using stats::tsdiag( ) but as
long as the TSA package is attached the function from the "TSA" package is
called. I believe the problem is the result of the TSA package not having a
"namespace". The only solution I have found is to detach the TSA package,
(detach("package:TSA")) , which results in the loss of all the TSA specific
functions. Does anyone have another solution?
The following code illustrates the problem:
Y1<-arima.sim(n=100,list(ar=c(.95,-0.2)))
model1<-arima(Y1,order=c(2,0,0))
tsdiag(model1)
library(TSA)
tsdiag(model1)
stats::tsdiag(model1)
detach("package:TSA")
tsdiag(model1)
R Saba
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Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
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