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This question is an exact duplicate of:

I am tried as follows But problem is all the fitted values are 39

Data : Test and Train data

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marked as duplicate by whuber Jun 22 at 18:53

This question was marked as an exact duplicate of an existing question.

  • $\begingroup$ Related to or even a duplicate of this. $\endgroup$ – Richard Hardy Jun 22 at 18:51
  • $\begingroup$ Problem didnt fixed $\endgroup$ – Shawon Sikder Jun 22 at 18:56
  • $\begingroup$ You asked How to predict on test test by ARIMA in R, I gave you a step-by-step answer including the code. What more could you want? If you have a question why an optimal forecast from ARIMA(0,1,0) is the last observed value, take a look at a time series textbook or post a new, specific question. But do you need any further clarification on the questions you have already asked? $\endgroup$ – Richard Hardy Jun 22 at 18:59
  • $\begingroup$ Thank you. I get that $\endgroup$ – Shawon Sikder Jun 22 at 19:57