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  "Type": "Package",
  "Title": "Activity Index Calculation using Raw 'Accelerometry' Data",
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  "Authors@R": "c(\nperson(given = \"Jiawei\",\nfamily = \"Bai\",\nrole = c(\"cre\", \"aut\"),\nemail = \"jbai@jhsph.edu\",\ncomment = c(ORCID = \"0000-0003-4021-0101\")\n),\nperson(given = \"John\",\nfamily = \"Muschelli\",\nemail = \"muschellij2@gmail.com\",\nrole = c(\"ctb\"),\ncomment = c(ORCID = \"0000-0001-6469-1750\"))\n)",
  "Description": "Reads raw 'accelerometry' from 'GT3X+' data and plain\ntable data to calculate Activity Index from 'Bai et al.' (2016)\n<doi:10.1371/journal.pone.0160644>.  The Activity Index refers\nto the square root of the second-level average variance of the\nthree 'accelerometry' axes.",
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    "Date": "2026-05-13 08:02:05 UTC",
    "User": "root"
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  "Author": "Jiawei Bai [cre, aut]\n(<https://orcid.org/0000-0003-4021-0101>), John Muschelli [ctb]\n(<https://orcid.org/0000-0001-6469-1750>)",
  "Maintainer": "Jiawei Bai <jbai@jhsph.edu>",
  "Repository": "https://cran.r-universe.dev",
  "Date/Publication": "2021-01-11 05:50:23 UTC",
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    "extra/citation.html",
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    "extra/citation.txt",
    "extra/contents.json",
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    "ReadGT3XPlus",
    "ReadTable",
    "Sigma0"
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    {
      "page": "computeActivityIndex",
      "title": "Compute Activity Index",
      "topics": [
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        "computeActivityIndex.default",
        "computeActivityIndex.GT3XPlus"
      ]
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      "title": "Print method for token",
      "topics": [
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    },
    {
      "page": "ReadGT3XPlus",
      "title": "Read the raw tri-axial accelerometry data csv file by ActiGraph GT3X+.",
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      ]
    },
    {
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      "title": "Read the raw tri-axial accelerometry data csv file.",
      "topics": [
        "ReadTable"
      ]
    },
    {
      "page": "Sigma0",
      "title": "\\bar{sigma}_i computing using raw accelerometry data",
      "topics": [
        "Sigma0"
      ]
    },
    {
      "page": "TimeScale",
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    "R.methodsS3",
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    "R.utils"
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      "source": "ActivityIndexIntro.Rmd",
      "filename": "ActivityIndexIntro.html",
      "title": "Introduction to the ActivityIndex package in R",
      "author": "Jiawei Bai",
      "engine": "knitr::rmarkdown",
      "headings": [
        "Data description",
        "Read the data",
        "Compute AI",
        "Find $\\bar{\\sigma}_i$ on-the-fly",
        "Find $\\bar{\\sigma}_i$ beforehand",
        "Explore AI"
      ],
      "created": "2018-12-31 21:10:21",
      "modified": "2021-01-11 05:50:23",
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