Hi Don, wow, you are so right. I picked that piece up from the bloggers tutorial and since I am R naive yet, I thought it was all one step
moving_average = forecast(ma(tdat[1:31], order=2), h=5) Truly, I usually print and check at every step I can, as painful as it is sometimes. Great lesson for this novice usR. So the first and last values are NA in each case? Do you know why? Should I replace the NA with a value, say the average of the others? Also, I have 5 series of data I am working with using this script and of course each gave me that warning, but only the one series had the same 8 Point Forecast values, is that coincidental you think? Terrific of you to help, I really appreciate it. WHP From: MacQueen, Don [mailto:macque...@llnl.gov] Sent: Friday, June 01, 2018 12:54 PM To: Bill Poling <bill.pol...@zelis.com>; r-help (r-help@r-project.org) <r-help@r-project.org> Subject: Re: [R] Time-series moving average question You are right that there are no NAs in the practice data. But there are NAs in the moving average data. To see this, break your work into two separate steps, like this: tnr.ma<http://tnr.ma> <- ma(dat3[1:28], order=3) TNR_moving_average <- forecast(tnr.ma<http://tnr.ma>, h=8) I think you will find that the warning comes from the second step. Print tnr.ma<http://tnr.ma> and you will see some NAs. -Don -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 Lab cell 925-724-7509 From: Bill Poling <bill.pol...@zelis.com<mailto:bill.pol...@zelis.com>> Date: Friday, June 1, 2018 at 8:58 AM To: "MacQueen, Don" <macque...@llnl.gov<mailto:macque...@llnl.gov>>, array R-help <r-help@r-project.org<mailto:r-help@r-project.org>> Subject: RE: [R] Time-series moving average question Hello Don, thank you for your response. I appreciate your help. I am using the forecast package, originally I found it following a forecasting example on bloggers.com<http://bloggers.com> https://www.r-bloggers.com/time-series-analysis-using-r-forecast-package/<https://www.r-bloggers.com/time-series-analysis-using-r-forecast-package/> And subsequently located the complete pdf https://cran.r-project.org/web/packages/forecast/forecast.pdf<https://cran.r-project.org/web/packages/forecast/forecast.pdf> Since I created this practice data using the structure() function I am unsure why there would be NA’s as there are none apparently in the structure? No worries though, I am going to reach out to the package author. Cheers. WHP From: MacQueen, Don [mailto:macque...@llnl.gov] Sent: Friday, June 01, 2018 11:24 AM To: Bill Poling <bill.pol...@zelis.com<mailto:bill.pol...@zelis.com>>; r-help (r-help@r-project.org<mailto:r-help@r-project.org>) <r-help@r-project.org<mailto:r-help@r-project.org>> Subject: Re: [R] Time-series moving average question My guess would be that if you inspect the output from ma(dat3[1:28], order=3) you will find some NAs in it. And then forecast() doesn't like NAs. But I can't check, because I can't find the ma() and forecast() functions. I assume they come from some package you installed; it would be helpful to say which package. -Don -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 Lab cell 925-724-7509 ______________________________________________ mailto:R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html<http://www.R-project.org/posting-guide.html> and provide commented, minimal, self-contained, reproducible code. Confidentiality Notice This message is sent from Zelis. This transmission may contain information which is privileged and confidential and is intended for the personal and confidential use of the named recipient only. Such information may be protected by applicable State and Federal laws from this disclosure or unauthorized use. 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