The question title doesn't help, but i'll try to explain it:
I have historical data (weekly points) from 2001/01/01 to yesterday and my variable has a strong seasonal pattern of 12 months (weather data).
I'm using the stlf() function (from the R 'forecast' package) to make weekly forecasts - and getting very good results by the way.
The problem is that for some models i don't have the 2 last years of data, so for these models my data goes from 2001/01/01 to 2010/12/31. What can i do to bring these forecasts 'to the future'? In other words, i need to extrapolate these forecasts to the current week.
What i have: data from 2001/01/01 - 2010/12/31 What i need: make forecasts for the next weeks.
To add confusion, i do have some points from the last month, but i don't know how to take advantage of this.
Thanks for any help!