Hi, I want to predict using airma, but I want to predict using t-2 or t-3,
instead of t-1
right now the arima() function doesn't allow me to do that, it will alwasy
return with variable t-1 ,
what is the way to skip that variable?
thanks ®ards
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besides
I use Lag(x,h) to plot the lagged ts graph, it is very usefful
but when doing the regression(arima, xreg=), i am really not sure if I
should use lag(x,-h) or Lag(x,h)
from online i see people use lag(x,-h), but i didnt believe that, bc I can't
plot the lagged graph using this function.
lag is a very confusing function
i try to plot lag(x,-h) and y , the results are the same figures for all the
h lags.
then i saw online people use lag(x,-h) as xreg in arima
that won't work in my eyes if lag function is consistent, isnce it returns
the same value for all the lags
i don't know in wh
thanks, it works!
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Hi, i try to plot ts data on x-y coordiante
I want my data to be points, but somehow it always comes out with lines and
# linked bwtween data,
i used plot(lag(x,-9),y,type="p"), x and y are time series data
is there anyway to remove those lines?
Thanks a lot
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