In my opinion there should be at least the following two tags, I couldn't find:

  • "Time Series",
  • "Functional Data Analysis".

Since functional data are used more and more and time series as a discipline are very popular, it could be considered to have the following tag as well:

  • "Functional Time Series".

What do you think about that?


  • $\begingroup$ Are there any existing questions which for which these tags would be appropriate? Tags cannot exist unless they are attached to questions. $\endgroup$
    – user642796
    Commented May 25, 2016 at 14:40
  • $\begingroup$ I could have asked a couple of questions, but there haven't been appropriate tags for doing that. $\endgroup$
    – Obriareos
    Commented May 25, 2016 at 15:57
  • 2
    $\begingroup$ How has the lack of tags prevented you from asking the questions? $\endgroup$ Commented May 25, 2016 at 19:56
  • $\begingroup$ Good question: It hasn't. But if these tags exist, it would be a lot easier to filter questions I am interested in, since I work on specific functional time series. $\endgroup$
    – Obriareos
    Commented May 25, 2016 at 21:10
  • $\begingroup$ The onus is on you to demonstrate that these tags are actually desirable now. Again, a tag cannot exist without being attached to a question, so unless you can demonstrate on-topic questions existing now that would benefit from having this tag there is little discussion left to have. $\endgroup$
    – user642796
    Commented May 26, 2016 at 4:07
  • $\begingroup$ E.g. two of my posts ("Hadamard Product (Schurproduct)" & "When is an selfadjoint operatorvalued matrix with positive semidefinite diagonal elements positive semidefinite as well?"). I didn't explicitly mentioned that it has something to do with functional time series, but the ones dealing with functional time series would have noticed why I was asking that immediately and could have given an appropriate answer quicker. The other reason is that I need these tags for future questions. $\endgroup$
    – Obriareos
    Commented May 29, 2016 at 17:31

1 Answer 1


Both (time-series) and (functional-data-analysis) tags exist at Cross Validated ... are there so many non-statistics uses of them that it justifies adding them here as well?

  • $\begingroup$ Thanks for you hint. However, I think the tags should exist, since "Cross Validated" seems to be very focused on application. If you take a look at papers (e.g. from Denis Bosq) dealing with Functional Autoregressive Processes you will see it is an "own world". It doesn't really fit into "Functional Analysis", "Statistics" or "Operator Theory". $\endgroup$
    – Obriareos
    Commented May 25, 2016 at 16:05
  • $\begingroup$ You need more pros? I would like to get this question answered. Thank you! $\endgroup$
    – Obriareos
    Commented Jun 12, 2016 at 14:19

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