I am having a total brain fart... complete and total. This is part R, Part
Statstitics, Part "My Brain is on vacation apparently."

Ok I have a time series I need to LOG and DIFF for ARIMA with Regressors.
Say 100 data points.
Obviously when I diff the series once I get 98 data points now. So what is
the appropriate way to handle that now.

Part B (This is where I am having a fundamental brain fart). Given that I
have Logged and Diff'ed the original Time Series and I want to get a
forecast, how do I apply that back to my original data? I am having a mental
implosion right now (Just got back from vacation.) I am just not wrapping my
head around forecasting in R against transformed data (For stationary
purposes).

Total brain meltdown (mmmm grilled cheese sounds good...) Anyone have a
basic shell script I can look at for reference... not connecting dots
today....



Idgarad
-- 
"Who is John Galt?"

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