You appear to be doing the differencing twice. Do it only in arima, and
not in the data you supply.
On Thu, 15 May 2008, Habib, Mohamed A F A M wrote:
I have the following model:
m1.dis=arima(diff(diff(log(ts1),lag=12)),order=c(0,1,1),seasonal=list(order=c(0,1,1),period=12))
I would like to
I have the following model:
m1.dis=arima(diff(diff(log(ts1),lag=12)),order=c(0,1,1),seasonal=list(order=c(0,1,1),period=12))
I would like to know how to plot the correct predictions in the original units
because I am trying the following code but it is not working.
I believe that there must be s
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