R help - Nov 2004 - tsdiag for ar?

Is there a way to have the ar function work with tsdiag for on-the-fly
visualization of ar fits? I have to fit a great many models of varying
order and would like to save the diagnostic graphs.

For instance, 
tsdiag(ar(lh))
tsdiag(arima(lh, order = c(3,0,0)))

Thanks...

On Wed, 24 Nov 2004, Dr Carbon wrote:
> Is there a way to have the ar function work with tsdiag for on-the-fly
> visualization of ar fits? I have to fit a great many models of varying
> order and would like to save the diagnostic graphs.
First you have to produce them, surely?
> For instance,
> tsdiag(ar(lh))
That gives an error. All you have to do is to write an "ar" method for
tsdiag -- a good exercise in R programming for you.
> tsdiag(arima(lh, order = c(3,0,0)))

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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