On Mar 19, 2011, at 7:02 PM, AOLeary wrote:

I'm using the TSA package (along with all prerequisites) to do some GARCH work and for some reason, something which used to work for me has decided to
up and stop. The code is as follows, after loading the package:

"
gs <- garch.sim(alpha=c(1.9,0.1), beta=c(0.700001, -0.0800003, -0.016),rnd =
rnorm, n = 400, ntrans=500)

gs1 <- garch.sim(alpha=c(1.9,0.1), beta=c(0.7, -0.08, -0.016),rnd = rnorm, n
= 400, ntrans=500)

gts=ts(gs)

gts1=ts(gs1)

dgts=gts1-gts

test <- garch(dgts, order=c(0,0))

plot(test)
"

However, I get the following error:

Actually you failed to note that you got an earlier error from the garch() function:

Error in sigt[1:max(order[1], order[2])] <- rep.int(NA, max(order[1],  :
  replacement has length zero

Which raises the question... what does it mean to specify a GARCH model of order c(0,0)?

--
David.



"
Error in plot(test) : object 'test' not found
"

What's extra annoying is that I had been using this type of code before and it was working fine, I honestly don't know what the problem is, I've used R reasonable extensively before but never with these packages so I'm not sure
what I might have done wrong.

If anyone could take the time to help me out, I'd really appreciate it.

Yours etc,
Aodhán



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