{
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  "Date": "2026-04-12",
  "Title": "S3 Infrastructure for Regular and Irregular Time Series (Z's\nOrdered Observations)",
  "Authors@R": "c(person(given = \"Achim\", family = \"Zeileis\", role = c(\"aut\", \"cre\"), email = \"Achim.Zeileis@R-project.org\", comment = c(ORCID = \"0000-0003-0918-3766\")),\nperson(given = \"Gabor\", family = \"Grothendieck\", role = \"aut\", email = \"ggrothendieck@gmail.com\"),\nperson(given = c(\"Jeffrey\", \"A.\"), family = \"Ryan\", role = \"aut\", email = \"jeff.a.ryan@gmail.com\"),\nperson(given = c(\"Joshua\", \"M.\"), family = \"Ulrich\", role = \"ctb\", email = \"josh.m.ulrich@gmail.com\"),\nperson(given = \"Felix\", family = \"Andrews\", role = \"ctb\", email = \"felix@nfrac.org\"))",
  "Description": "An S3 class with methods for totally ordered indexed\nobservations. It is particularly aimed at irregular time series\nof numeric vectors/matrices and factors. zoo's key design goals\nare independence of a particular index/date/time class and\nconsistency with ts and base R by providing methods to extend\nstandard generics.",
  "License": "GPL-2 | GPL-3",
  "URL": "https://zoo.R-Forge.R-project.org/",
  "Repository": "https://r-forge.r-universe.dev",
  "Date/Publication": "2026-04-12 03:17:46 UTC",
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  "Author": "Achim Zeileis [aut, cre] (ORCID:\n<https://orcid.org/0000-0003-0918-3766>),\nGabor Grothendieck [aut],\nJeffrey A. Ryan [aut],\nJoshua M. Ulrich [ctb],\nFelix Andrews [ctb]",
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  "_published": "2026-06-23T17:52:22.888Z",
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        "index",
        "index.default",
        "index.ts",
        "index.zoo",
        "index<-",
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        "5. Why does lag give slightly different results on a \"zoo\" and a \"zooreg\" series which are otherwise the same?",
        "6. How do I subtract the mean of each month from a \"zoo\" series?",
        "7. How do I create a monthly series but still keep track of the dates?",
        "8. How are axes added to a plot created using plot.zoo?",
        "9. Why is nothing plotted except axes when I plot an object with many NAs?",
        "10. Does zoo work with Rmetrics?",
        "11. What other packages use zoo?",
        "12. Why does ifelse not work as I expect?",
        "13. In a series which is regular except for a few missing times or for which we wish to align to a grid how is it filled in or aligned?",
        "14. What is the difference between as.Date in zoo and as.Date in the core of R?",
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