New answers tagged state-space-models
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(hi, i cant comment so
1.
arima (1,0,0) = ar (1) need 1 previous observation
ar (2) need 2 previous observations
2.
arima do calculate with training data value of coeficients
(for ar (1) its like: intercept and ar1
you can calculate coeficients arima(data[1:400]
or you can also arima(data[1:472]
(1) so you always need previous (current data) to make 1 step ...
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