[R] how to make this time series data stationary ?

R. Michael Weylandt michael.weylandt at gmail.com
Thu Mar 22 14:13:50 CET 2012


Please (!) go read a book on basic time series analysis instead of
just posting a question each time you see a new word.

Michael

On Thu, Mar 22, 2012 at 4:56 AM, sagarnikam123 <sagarnikam123 at gmail.com> wrote:
> i have below file as time series data
> http://r.789695.n4.nabble.com/file/n4494907/1A2X_B_phi_psi_pot_r_k.txt
> 1A2X_B_phi_psi_pot_r_k.txt
> i used autofit function from "itsmr" package
>
>>k<-read.table(file.choose())
>> ar(k$V1)
> Call:
> ar(x = k$V1)
> Order selected 0  sigma^2 estimated as  0.2499
>
>> autofit(k$V1)
> Error in arima(x, c(p, 0, q)) : non-stationary AR part from CSS
>
> what is this CSS ?& hot to make it stationary
>
> --
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>
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