[
  {
     "label": "Vertical Bar chart:linear Y-axis",
     "notes": "Note that 0 must be specified in the y-domain to avoid hiding the first bar. Circles are added for visual reference.",
     "tests": [
       "One bar per period renders as expected",
       "Bar heights are roughly at mean levels for circles"
     ],
     "settings": {
        "max_width": 500,
        "x": {
           "column": "Period",
           "type": "ordinal"
        },
        "y": {
           "column": "Boil",
           "type": "linear",
           "domain":[0,null],
           "label": "Average Boiling Point (K)"
        },
        "marks": [
           {
              "type": "bar",
              "per": [
                 "Period"
              ],
              "summarizeX":"mean"
           },
           {
              "type": "circle",
              "per": [
                 "Element"
              ],
              "attributes":{"stroke":"black","fill":"none"},
              "summarizeX":"mean"
           }
        ]
     },
     "filename":"elements.csv"
  },
  {
     "label": "Vertical bar chart: Histogram with 10 bins (no y-variable specified) with linear Y-axis",
     "notes": "Note that 0 must be specified in the y-domain.",
     "tests": [
       "10 Bars expected (1 per bin)"
     ],
     "settings": {
        "max_width": 500,
        "x": {
           "type": "linear",
           "column": "Weight",
           "bin":10,
           "label": "Weight"

        },
        "y": {
           "column": "",
           "type":"linear",
           "label":"Number of observations",
           "domain":[0,null]

        },
        "marks": [
           {
              "type": "bar",
              "per":["Weight"],
              "summarizeY":"count",
              "summarizeX":"mean"
           }
        ]
     },
     "filename":"elements.csv"
  },
  {
     "label": "Vertical Bar chart: log Y-axis",
     "notes": "Bars not rendering in v1.8. A domain must be specified if there are any 0's or negative numbers. (note that missing values are imputed to 0)",
     "tests": [
       "One bar per period renders as expected",
       "Bar heights are roughly at mean levels for circles"
     ],
     "settings": {
        "max_width": 500,
        "x": {
           "column": "Period",
           "type": "ordinal"
        },
        "y": {
           "column": "Weight",
           "type": "log",
           "label": "Weight"
        },
        "marks": [
           {
              "type": "bar",
              "per": [
                 "Period"
              ],
              "summarizeX":"mean"
           },
           {
              "type": "circle",
              "per": [
                 "Element"
              ],
              "attributes":{"stroke":"black","fill":"none"},
              "summarizeX":"mean"
           }
        ]
     },
     "filename":"elements.csv"
  },
  {
     "label": "Vertical Bar chart: date Y-axis",
     "notes": "Not a very pretty chart, but demonstrates compatability of bars/dates.",
     "settings": {
        "max_width": 500,
        "y": {
           "column": "Query Open Date",
           "type": "time",
           "format": "%y-%m"
        },
        "x": {
           "type": "ordinal",
           "label": "Query Status",
           "column":"Query Status"
        },
        "date_format": "%Y-%m-%d",
        "marks": [
           {
              "type": "bar",
              "per": ["Query Status"]
           }
        ]
     },
     "filename":"queries.csv"
  },
  {
     "label": "Vertical Bar chart: Ordinal Y-axis",
     "notes": "Bars don't render. This is expected.",
     "tests": [],
     "settings": {
        "max_width": 500,
        "x": {
           "column": "Period",
           "type": "ordinal"
        },
        "y": {
           "column": "Group",
           "type": "ordinal"
        },
        "marks": [
           {
              "type": "bar",
              "per": [
                 "Element"
              ]
           },
           {
              "type": "circle",
              "per": [
                 "Element"
              ],
              "attributes":{"stroke":"black","fill":"none"},
              "summarizeX":"mean"
           }
        ]
     },
     "filename":"elements.csv"
  }
]