{
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  "Package": "rice",
  "Type": "Package",
  "Title": "Radiocarbon Equations",
  "Version": "2.1.1",
  "Authors@R": "c(\nperson(\"Maarten\", \"Blaauw\", email=\"maarten.blaauw@qub.ac.uk\", role=c(\"aut\", \"cre\"),\ncomment=c(ORCID=\"0000-0002-5680-1515\")),\nperson(\"Paula\", \"Reimer\", email=\"p.j.reimer@qub.ac.uk\", role=\"ctb\",\ncomment=c(ORCID=\"0000-0001-9238-2146\")),\nperson(\"Vegard\", \"Martinsen\", email=\"vegard.martinsen@nmbu.no\", role=\"ctb\",\ncomment=c(ORCID=\"0000-0002-7096-1806\")))",
  "Maintainer": "Maarten Blaauw <maarten.blaauw@qub.ac.uk>",
  "Description": "Provides functions for the calibration of radiocarbon\ndates, as well as options to calculate different\nradiocarbon-related timescales (cal BP, cal BC/AD, C14 age,\nF14C, pMC, D14C) and estimating the effects of contamination or\nlocal reservoir offsets (Reimer and Reimer 2001\n<doi:10.1017/S0033822200038339>). Supporting publication:\nBlaauw, M., Reimer, P.J., in press. An open-source toolkit for\nradiocarbon dating and calibration. Radiocarbon. The methods\nfollow long-established recommendations such as Stuiver and\nPolach (1977) <doi:10.1017/S0033822200003672> and Reimer et al.\n(2004) <doi:10.1017/S0033822200033154>. This package uses the\ncalibration curves from the data package 'rintcal'.",
  "License": "GPL (>= 2)",
  "Encoding": "UTF-8",
  "URL": "https://github.com/Maarten14C/rice",
  "Language": "en-GB",
  "VignetteBuilder": "knitr",
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  "Repository": "https://maarten14c.r-universe.dev",
  "Date/Publication": "2026-05-25 16:30:16 UTC",
  "RemoteUrl": "https://github.com/maarten14c/rice",
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  "Author": "Maarten Blaauw [aut, cre] (ORCID:\n<https://orcid.org/0000-0002-5680-1515>),\nPaula Reimer [ctb] (ORCID: <https://orcid.org/0000-0001-9238-2146>),\nVegard Martinsen [ctb] (ORCID: <https://orcid.org/0000-0002-7096-1806>)",
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    "adjust.fractionation",
    "age.F14C",
    "age.pMC",
    "age.range",
    "as.bin",
    "as.one",
    "b2ktoBCAD",
    "b2ktoC14",
    "b2ktocalBP",
    "b2ktoDelta14C",
    "b2ktoF14C",
    "b2ktopMC",
    "BCADtob2k",
    "BCADtoC14",
    "BCADtocalBP",
    "BCADtoDelta14C",
    "BCADtoF14C",
    "BCADtopMC",
    "C14tob2k",
    "C14toBCAD",
    "C14tocalBP",
    "C14toDelta14C",
    "C14toF14C",
    "C14topMC",
    "calBPtob2k",
    "calBPtoBCAD",
    "calBPtoC14",
    "calBPtoDelta14C",
    "calBPtoF14C",
    "calBPtopMC",
    "caldist",
    "calib.t",
    "calibratable",
    "calibrate",
    "clean",
    "contaminate",
    "coverage",
    "CtoF",
    "Delta14CtoC14",
    "Delta14CtoF14C",
    "Delta14CtopMC",
    "draw.ccurve",
    "draw.CF",
    "draw.contamination",
    "draw.dates",
    "draw.Delta14C",
    "F14C.age",
    "F14CtoC14",
    "F14CtoDelta14C",
    "F14CtopMC",
    "find.shells",
    "fractions",
    "fromto",
    "FtoC",
    "howmuchC14",
    "hpd",
    "hpd.overlap",
    "l.calib",
    "map.dates",
    "map.shells",
    "muck",
    "older",
    "overlap",
    "p.range",
    "pMC.age",
    "pMCtoC14",
    "pMCtoDelta14C",
    "pMCtoF14C",
    "point.estimates",
    "pool",
    "push.gamma",
    "push.normal",
    "r.calib",
    "shells.mean",
    "smooth.ccurve",
    "span",
    "spread",
    "weighted_means",
    "younger"
  ],
  "_datasets": [
    {
      "name": "shells",
      "title": "shells Data",
      "object": "shells",
      "class": [
        "data.frame"
      ],
      "fields": [
        "lon",
        "lat",
        "no",
        "taxonN",
        "dR",
        "dSTD",
        "collected",
        "res",
        "res.error",
        "C14",
        "er",
        "lab",
        "ref",
        "taxon",
        "feeding"
      ],
      "rows": 2053,
      "table": true,
      "tojson": true
    },
    {
      "name": "shroud",
      "title": "shroud Data",
      "object": "shroud",
      "class": [
        "data.frame"
      ],
      "fields": [
        "ID",
        "y",
        "er"
      ],
      "rows": 12,
      "table": true,
      "tojson": true
    }
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  "_help": [
    {
      "page": "rice-package",
      "title": "rice: Radiocarbon Equations",
      "topics": [
        "rice-package"
      ]
    },
    {
      "page": "adjust.background",
      "title": "Adjust a radiocarbon age for background measurements",
      "topics": [
        "adjust.background"
      ]
    },
    {
      "page": "adjust.fractionation",
      "title": "Adjust a radiocarbon age for fractionation",
      "topics": [
        "adjust.fractionation"
      ]
    },
    {
      "page": "age.F14C",
      "title": "Deprecated. Use C14toF14C instead",
      "topics": [
        "age.F14C"
      ]
    },
    {
      "page": "age.pMC",
      "title": "Deprecated. Use C14topMC instead.",
      "topics": [
        "age.pMC"
      ]
    },
    {
      "page": "age.range",
      "title": "Calculate age ranges",
      "topics": [
        "age.range"
      ]
    },
    {
      "page": "as.bin",
      "title": "Combine multiple radiocarbon dates within bins",
      "topics": [
        "as.bin"
      ]
    },
    {
      "page": "as.one",
      "title": "Combine multiple radiocarbon dates assuming they belong to the same single year",
      "topics": [
        "as.one"
      ]
    },
    {
      "page": "b2ktoBCAD",
      "title": "calculate cal BC/AD ages from b2k ages",
      "topics": [
        "b2ktoBCAD"
      ]
    },
    {
      "page": "b2ktoC14",
      "title": "Find the 14C age and error belonging to a b2k age.",
      "topics": [
        "b2ktoC14"
      ]
    },
    {
      "page": "b2ktocalBP",
      "title": "calculate cal BP ages from b2k ages",
      "topics": [
        "b2ktocalBP"
      ]
    },
    {
      "page": "b2ktoDelta14C",
      "title": "Find the Delta14C and error belonging to a b2k age.",
      "topics": [
        "b2ktoDelta14C"
      ]
    },
    {
      "page": "b2ktoF14C",
      "title": "Find the F14C and error belonging to a b2k age.",
      "topics": [
        "b2ktoF14C"
      ]
    },
    {
      "page": "b2ktopMC",
      "title": "Find the pMC and error belonging to a b2k age.",
      "topics": [
        "b2ktopMC"
      ]
    },
    {
      "page": "BCADtob2k",
      "title": "calculate b2k from cal BC/AD ages",
      "topics": [
        "BCADtob2k"
      ]
    },
    {
      "page": "BCADtoC14",
      "title": "Find the 14C age and error belonging to a cal BC/AD age.",
      "topics": [
        "BCADtoC14"
      ]
    },
    {
      "page": "BCADtocalBP",
      "title": "calculate cal BP ages from cal BC/AD ages",
      "topics": [
        "BCADtocalBP"
      ]
    },
    {
      "page": "BCADtoDelta14C",
      "title": "Find the Delta14C and error belonging to a cal BC/AD age.",
      "topics": [
        "BCADtoDelta14C"
      ]
    },
    {
      "page": "BCADtoF14C",
      "title": "Find the F14C and error belonging to a cal BC/AD age.",
      "topics": [
        "BCADtoF14C"
      ]
    },
    {
      "page": "BCADtopMC",
      "title": "Find the pMC and error belonging to a cal BC/AD age.",
      "topics": [
        "BCADtopMC"
      ]
    },
    {
      "page": "C14tob2k",
      "title": "Find the b2k age(s) crossing a C14 age.",
      "topics": [
        "C14tob2k"
      ]
    },
    {
      "page": "C14toBCAD",
      "title": "Find the cal BCAD age(s) crossing a C14 age.",
      "topics": [
        "C14toBCAD"
      ]
    },
    {
      "page": "C14tocalBP",
      "title": "Find the calBP age(s) crossing a C14 age.",
      "topics": [
        "C14tocalBP"
      ]
    },
    {
      "page": "C14toDelta14C",
      "title": "Transform C14 age(s) into Delta14C",
      "topics": [
        "C14toDelta14C"
      ]
    },
    {
      "page": "C14toF14C",
      "title": "Calculate F14C values from C14 ages",
      "topics": [
        "C14toF14C"
      ]
    },
    {
      "page": "C14topMC",
      "title": "Calculate pMC values from C14 ages",
      "topics": [
        "C14topMC"
      ]
    },
    {
      "page": "calBPtob2k",
      "title": "calculate b2k ages from cal BP ages",
      "topics": [
        "calBPtob2k"
      ]
    },
    {
      "page": "calBPtoBCAD",
      "title": "calculate cal BC/AD ages from cal BP ages",
      "topics": [
        "calBPtoBCAD"
      ]
    },
    {
      "page": "calBPtoC14",
      "title": "Find the 14C age and error belonging to a cal BP age.",
      "topics": [
        "calBPtoC14"
      ]
    },
    {
      "page": "calBPtoDelta14C",
      "title": "Find the Delta14C and error belonging to a cal BP age.",
      "topics": [
        "calBPtoDelta14C"
      ]
    },
    {
      "page": "calBPtoF14C",
      "title": "Find the F14C and error belonging to a cal BP age.",
      "topics": [
        "calBPtoF14C"
      ]
    },
    {
      "page": "calBPtopMC",
      "title": "Find the pMC and error belonging to a cal BP age.",
      "topics": [
        "calBPtopMC"
      ]
    },
    {
      "page": "caldist",
      "title": "Calculate calibrated distribution",
      "topics": [
        "caldist"
      ]
    },
    {
      "page": "calib.t",
      "title": "Comparison dates calibrated using both the t distribution (Christen and Perez 2009) and the normal distribution.",
      "topics": [
        "calib.t"
      ]
    },
    {
      "page": "calibratable",
      "title": "Make a table of calibrated dates",
      "topics": [
        "calibratable"
      ]
    },
    {
      "page": "calibrate",
      "title": "Plot individual calibrated dates.",
      "topics": [
        "calibrate"
      ]
    },
    {
      "page": "clean",
      "title": "Simulate removing contamination from a radiocarbon age",
      "topics": [
        "clean"
      ]
    },
    {
      "page": "contaminate",
      "title": "Simulate the impact of contamination on a radiocarbon age",
      "topics": [
        "contaminate"
      ]
    },
    {
      "page": "coverage",
      "title": "To be retired - coverage of one distribution by another.",
      "topics": [
        "coverage"
      ]
    },
    {
      "page": "CtoF",
      "title": "Calculate F14C values from C14 ages",
      "topics": [
        "CtoF"
      ]
    },
    {
      "page": "Delta14CtoC14",
      "title": "Transform Delta14C into C14 age",
      "topics": [
        "Delta14CtoC14"
      ]
    },
    {
      "page": "Delta14CtoF14C",
      "title": "Transform Delta14C into F14C",
      "topics": [
        "Delta14CtoF14C"
      ]
    },
    {
      "page": "Delta14CtopMC",
      "title": "Transform Delta14C into pMC",
      "topics": [
        "Delta14CtopMC"
      ]
    },
    {
      "page": "draw.ccurve",
      "title": "Draw a calibration curve.",
      "topics": [
        "draw.ccurve"
      ]
    },
    {
      "page": "draw.CF",
      "title": "Draw the asymmetric relationship between 14C and F14C",
      "topics": [
        "draw.CF"
      ]
    },
    {
      "page": "draw.contamination",
      "title": "Draw contamination impacts",
      "topics": [
        "draw.contamination"
      ]
    },
    {
      "page": "draw.dates",
      "title": "add calibrated distributions to a plot.",
      "topics": [
        "draw.dates"
      ]
    },
    {
      "page": "draw.Delta14C",
      "title": "Draw Delta14C and the calibration curve.",
      "topics": [
        "draw.Delta14C"
      ]
    },
    {
      "page": "F14C.age",
      "title": "Deprecated. Use F14CtoC14instead",
      "topics": [
        "F14C.age"
      ]
    },
    {
      "page": "F14CtoC14",
      "title": "Calculate C14 ages from F14C values.",
      "topics": [
        "F14CtoC14"
      ]
    },
    {
      "page": "F14CtoDelta14C",
      "title": "Transform F14C into Delta14C",
      "topics": [
        "F14CtoDelta14C"
      ]
    },
    {
      "page": "F14CtopMC",
      "title": "Calculate pMC ages from F14C values.",
      "topics": [
        "F14CtopMC"
      ]
    },
    {
      "page": "find.shells",
      "title": "Find nearby shell-derived dR values",
      "topics": [
        "find.shells"
      ]
    },
    {
      "page": "fractions",
      "title": "Estimate a missing radiocarbon age from fractions",
      "topics": [
        "fractions"
      ]
    },
    {
      "page": "fromto",
      "title": "translate between timescales",
      "topics": [
        "fromto"
      ]
    },
    {
      "page": "FtoC",
      "title": "Calculate C14 ages from F14C values.",
      "topics": [
        "FtoC"
      ]
    },
    {
      "page": "howmuchC14",
      "title": "Amount of C14 particles in a sample",
      "topics": [
        "howmuchC14"
      ]
    },
    {
      "page": "hpd",
      "title": "Calculate highest posterior density",
      "topics": [
        "hpd"
      ]
    },
    {
      "page": "hpd.overlap",
      "title": "Check whether hpds of two distributions overlap",
      "topics": [
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    },
    {
      "page": "l.calib",
      "title": "Find the calibrated probability of a calendar age for a 14C date.",
      "topics": [
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    },
    {
      "page": "map.dates",
      "title": "A map of 180k archaeological C-14 dates",
      "topics": [
        "map.dates"
      ]
    },
    {
      "page": "map.shells",
      "title": "Plot regional shell-derived dR values",
      "topics": [
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    },
    {
      "page": "muck",
      "title": "Calculate the amount of muck/contamination to explain an observed C14 age",
      "topics": [
        "muck"
      ]
    },
    {
      "page": "older",
      "title": "Find the probability of a calibrated date being older than a certain age",
      "topics": [
        "older"
      ]
    },
    {
      "page": "overlap",
      "title": "The overlap between calibrated C14 dates",
      "topics": [
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    },
    {
      "page": "p.range",
      "title": "Probability of a date lying within a cal BP range",
      "topics": [
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    },
    {
      "page": "pMC.age",
      "title": "Deprecated. Use pMCtoC14 instead.",
      "topics": [
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    {
      "page": "pMCtoC14",
      "title": "Calculate C14 ages from pMC values.",
      "topics": [
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      "title": "Transform pMC into Delta14C",
      "topics": [
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      "page": "pMCtoF14C",
      "title": "Calculate pMC ages from F14C values.",
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    {
      "page": "point.estimates",
      "title": "Calculate a point estimate",
      "topics": [
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    },
    {
      "page": "pool",
      "title": "Test if a set of radiocarbon dates can be combined",
      "topics": [
        "pool"
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    },
    {
      "page": "push.gamma",
      "title": "Add a gamma distribution to a calibrated date",
      "topics": [
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    },
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      "page": "push.normal",
      "title": "Add a normal distribution to a calibrated date",
      "topics": [
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    {
      "page": "r.calib",
      "title": "return a random calendar age from a calibrated distribution",
      "topics": [
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    {
      "page": "shells",
      "title": "shells Data",
      "topics": [
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    },
    {
      "page": "shells.mean",
      "title": "Plot and summarize the dR values",
      "topics": [
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    },
    {
      "page": "shroud",
      "title": "shroud Data",
      "topics": [
        "shroud"
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    },
    {
      "page": "smooth.curve",
      "title": "Smooth a calibration curve",
      "topics": [
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        "smooth.curve"
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    },
    {
      "page": "span",
      "title": "The time span between two calibrated dates",
      "topics": [
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    },
    {
      "page": "spread",
      "title": "The spread among calibrated dates",
      "topics": [
        "spread"
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    },
    {
      "page": "weighted_means",
      "title": "Calculate the weighted mean of C14 ages",
      "topics": [
        "weighted_means"
      ]
    },
    {
      "page": "younger",
      "title": "Find the probability of a calibrated date being of a certain age or younger than it",
      "topics": [
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      ]
    }
  ],
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      "source": "rice.Rmd",
      "filename": "rice.html",
      "title": "Introduction to the rice package",
      "engine": "knitr::rmarkdown",
      "headings": [
        "Introduction",
        "Installation",
        "Radiocarbon",
        "Calibration curves",
        "Timescales",
        "Pooling dates",
        "Contamination",
        "Fractions",
        "Calibration",
        "Marine offsets",
        "More maps",
        "Multiple calibrations"
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      "created": "2024-08-27 17:12:21",
      "modified": "2026-05-25 16:30:16",
      "commits": 39
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