{
  "_id": "6ac4c320f511ae58c09a1004",
  "Package": "SPREDA",
  "Type": "Package",
  "Title": "Statistical Package for Reliability Data Analysis",
  "Version": "1.2",
  "Date": "2025-03-28",
  "Authors@R": "c(person(given = \"Yili\",\nfamily = \"Hong\",\nrole = c(\"aut\", \"cre\"),\nemail = \"yilihong@vt.edu\"),\nperson(given = \"Yimeng\",\nfamily = \"Xie\",\nrole = \"aut\"),\nperson(given = \"Zhibing\",\nfamily = \"Xu\",\nrole = \"aut\"))",
  "Author": "Yili Hong [aut, cre], Yimeng Xie [aut], Zhibing Xu [aut]",
  "Maintainer": "Yili Hong <yilihong@vt.edu>",
  "Description": "The Statistical Package for REliability Data Analysis\n(SPREDA) implements recently-developed statistical methods for\nthe analysis of reliability data. Modern technological\ndevelopments, such as sensors and smart chips, allow us to\ndynamically track product/system usage as well as other\nenvironmental variables, such as temperature and humidity. We\nrefer to these variables as dynamic covariates. The package\ncontains functions for the analysis of time-to-event data with\ndynamic covariates and degradation data with dynamic\ncovariates. The package also contains functions that can be\nused for analyzing time-to-event data with right censoring, and\nwith left truncation and right censoring. Financial support\nfrom NSF and DuPont are acknowledged.",
  "License": "GPL-2",
  "NeedsCompilation": "no",
  "Packaged": {
    "Date": "2026-10-06 09:41:31 UTC",
    "User": "root"
  },
  "Repository": "https://yili-hong.r-universe.dev",
  "Date/Publication": "2025-03-29 14:20:02 UTC",
  "RemoteUrl": "https://github.com/cran/SPREDA",
  "RemoteRef": "HEAD",
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  "_expires": "2027-01-14T09:45:02.000Z",
  "_created": "2026-10-06T09:41:31.000Z",
  "_published": "2026-10-06T09:45:04.478Z",
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    "extra/citation.html",
    "extra/citation.json",
    "extra/citation.txt",
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  "_releases": [
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      "date": "2014-09-25"
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      "date": "2018-11-25"
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    "coef.Lifedata.MLE",
    "coefinitial.ftn",
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    "getnames",
    "getRanName",
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    "kaplan.meier.location",
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    "logLik.Lifedata.MLE",
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    "miniusloglik.ce.xt.lev",
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    "miniusloglik.ce.xt.norm",
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    "miniusloglik.sev.wts",
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    "plot.MICsplines",
    "plotdeglmx",
    "print.deglmx",
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    "print.summary.Lifedata.MLE",
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    "qlev",
    "qsev",
    "rlev",
    "rsev",
    "sqrt_mat",
    "summary.Lifedata.MLE",
    "xmat.obj.to.xmat",
    "xmat.to.cumsum"
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      "title": "Dynamic covariates for the coating data.",
      "object": "Coatingenv",
      "file": "Coatingenv.rda",
      "class": [
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        "TIME",
        "UVB",
        "UVA",
        "VIS",
        "TEMP",
        "RH",
        "UV",
        "GROUP"
      ],
      "rows": 3865,
      "table": true,
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    },
    {
      "name": "Coatingout",
      "title": "Dynamic covariates for coating data",
      "object": "Coatingout",
      "file": "Coatingout.rda",
      "class": [
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        "TIME",
        "DAMAGE_Y",
        "GROUP"
      ],
      "rows": 930,
      "table": true,
      "tojson": true
    },
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      "file": "Prod2.fai.dat.rda",
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        "delta",
        "ce"
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        "Censor"
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      "title": "Testdata",
      "object": "testdata",
      "file": "testdata.rda",
      "class": [
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        "failure",
        "manufacture.year",
        "manufacturer",
        "cooling",
        "insulation",
        "truncation",
        "truncation.age",
        "group"
      ],
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      "tojson": true
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  "_help": [
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      "page": "SPREDA-package",
      "title": "Statistical Package for Reliability Data Analysis",
      "topics": [
        "SPREDA-package",
        "SPREDA"
      ]
    },
    {
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      "title": "Create an object for cumulative exposure",
      "topics": [
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    },
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      "topics": [
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    },
    {
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      "title": "Dynamic covariates for the coating data.",
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    },
    {
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      "title": "Dynamic covariates for coating data",
      "topics": [
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        "coefinitial.ftn",
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        "plev",
        "qlev",
        "rlev"
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