Seasonal adjustment of time series using R ( x12 or seasonal)
I'm just a beginner of R.
I'm going to time series analysis using R.
Using R, one can use "x12" package or "seasonal"
package for x12arima.
I have tried them for some datas, there exists
some problem (for me).
1, the case using x12 command
Using default setting, x12 function automatically
decide the seasonal adjustment as additive
method or multiplicative method. But I must
always use multiplicative method. Using the
parameter "x11.samode", one can choose
multiplicative method but, I have tried to set
the parameter, I failed all....
2、the case using seasonal package
I can fix to use multiplicative method,
but I can not get the Forecast of final
seasonal factors... ( Past TC factor ,S,I
factor is OK)
Could you tell or advise me to clear this.
Thanks for you to read this message.
(I'm not native English speaker, so
my English is poor. excuse me...)