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  "Description": "Alluvial plots use variable-width ribbons and stacked bar\nplots to represent multi-dimensional or repeated-measures data\nwith categorical or ordinal variables; see Riehmann, Hanfler,\nand Froehlich (2005) <doi:10.1109/INFVIS.2005.1532152> and\nRosvall and Bergstrom (2010)\n<doi:10.1371/journal.pone.0008694>. Alluvial plots are\nstatistical graphics in the sense of Wilkinson (2006)\n<doi:10.1007/0-387-28695-0>; they share elements with Sankey\ndiagrams and parallel sets plots but are uniquely determined\nfrom the data and a small set of parameters. This package\nextends Wickham's (2010) <doi:10.1198/jcgs.2009.07098> layered\ngrammar of graphics to generate alluvial plots from tidy data.",
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    {
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      "date": "2018-07-06"
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    "GeomAlluvium",
    "GeomFlow",
    "GeomLode",
    "GeomStratum",
    "is_alluvia_form",
    "is_alluvial",
    "is_alluvial_alluvia",
    "is_alluvial_lodes",
    "is_lodes_form",
    "lode_backfront",
    "lode_backward",
    "lode_forward",
    "lode_frontback",
    "lode_leftright",
    "lode_leftward",
    "lode_rightleft",
    "lode_rightward",
    "lode_zagzig",
    "lode_zigzag",
    "positions_to_flow",
    "self_adjoin",
    "stat_alluvium",
    "stat_flow",
    "stat_stratum",
    "StatAlluvium",
    "StatFlow",
    "StatStratum",
    "to_alluvia",
    "to_alluvia_form",
    "to_lodes",
    "to_lodes_form"
  ],
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      "name": "majors",
      "title": "Students' declared majors across several semesters",
      "object": "majors",
      "class": [
        "data.frame"
      ],
      "fields": [
        "student",
        "semester",
        "curriculum"
      ],
      "rows": 80,
      "table": true,
      "tojson": true
    },
    {
      "name": "vaccinations",
      "title": "Influenza vaccination survey responses",
      "object": "vaccinations",
      "class": [
        "data.frame"
      ],
      "fields": [
        "survey",
        "freq",
        "subject",
        "response",
        "start_date",
        "end_date"
      ],
      "rows": 117,
      "table": true,
      "tojson": true
    }
  ],
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    {
      "page": "alluvial-data",
      "title": "Check for alluvial structure and convert between alluvial formats",
      "concept": [
        "alluvial data manipulation"
      ],
      "topics": [
        "alluvial-data",
        "is_alluvia_form",
        "is_lodes_form",
        "to_alluvia_form",
        "to_lodes_form"
      ]
    },
    {
      "page": "geom_alluvium",
      "title": "Alluvia across strata",
      "concept": [
        "alluvial geom layers"
      ],
      "topics": [
        "data_to_alluvium",
        "geom_alluvium"
      ]
    },
    {
      "page": "geom_flow",
      "title": "Flows between lodes or strata",
      "concept": [
        "alluvial geom layers"
      ],
      "topics": [
        "geom_flow",
        "positions_to_flow"
      ]
    },
    {
      "page": "geom_lode",
      "title": "Lodes at intersections of alluvia and strata",
      "concept": [
        "alluvial geom layers"
      ],
      "topics": [
        "geom_lode"
      ]
    },
    {
      "page": "geom_stratum",
      "title": "Strata at axes",
      "concept": [
        "alluvial geom layers"
      ],
      "topics": [
        "geom_stratum"
      ]
    },
    {
      "page": "lode-guidance-functions",
      "title": "Lode guidance functions",
      "topics": [
        "lode-guidance-functions",
        "lode_backfront",
        "lode_backward",
        "lode_forward",
        "lode_frontback",
        "lode_leftright",
        "lode_leftward",
        "lode_rightleft",
        "lode_rightward",
        "lode_zagzig",
        "lode_zigzag"
      ]
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      "topics": [
        "majors"
      ]
    },
    {
      "page": "self-adjoin",
      "title": "Adjoin a dataset to itself",
      "concept": [
        "alluvial data manipulation"
      ],
      "topics": [
        "self-adjoin",
        "self_adjoin"
      ]
    },
    {
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      "title": "Alluvial positions",
      "concept": [
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      ],
      "topics": [
        "stat_alluvium"
      ]
    },
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      "title": "Flow positions",
      "concept": [
        "alluvial stat layers"
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      "topics": [
        "stat_flow"
      ]
    },
    {
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      "concept": [
        "alluvial stat layers"
      ],
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        "stat_stratum"
      ]
    },
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      "title": "Influenza vaccination survey responses",
      "topics": [
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        "Alluvial data",
        "Alluvia (wide) format",
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        "Lode guidance",
        "Aesthetic binding",
        "Manual lode ordering",
        "Negative strata",
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