Struct FacetFieldDef 

pub struct FacetFieldDef {
    pub aggregate: Option<AggregateOp>,
    pub bin: Option<Bin>,
    pub field: Option<Field>,
    pub header: Option<Header>,
    pub sort: Option<Sort>,
    pub time_unit: Option<TimeUnit>,
    pub title: Option<String>,
    pub facet_field_def_type: Type,
}

Horizontal facets for trellis plots.

Vertical facets for trellis plots.

Fields

aggregate: Option<AggregateOp>

Aggregation function for the field (e.g., mean, sum, median, min, max, count).

Default value: undefined (None)

bin: Option<Bin>

A flag for binning a quantitative field, or an object defining binning parameters. If true, default binning parameters will be applied.

Default value: false

field: Option<Field>

Required. A string defining the name of the field from which to pull a data value or an object defining iterated values from the repeat operator.

Note: Dots (.) and brackets ([ and ]) can be used to access nested objects (e.g., "field": "foo.bar" and "field": "foo['bar']"). If field names contain dots or brackets but are not nested, you can use \\ to escape dots and brackets (e.g., "a\\.b" and "a\\[0\\]"). See more details about escaping in the field documentation.

Note: field is not required if aggregate is count.

header: Option<Header>

An object defining properties of a facet’s header.

sort: Option<Sort>

Sort order for the encoded field.

For continuous fields (quantitative or temporal), sort can be either "ascending" or "descending".

For discrete fields, sort can be one of the following:

• "ascending" or "descending" – for sorting by the values’ natural order in Javascript.
• A sort field definition for sorting by another field.
• An array specifying the field values in preferred order. In this case, the sort order will obey the values in the array, followed by any unspecified values in their original order. For discrete time field, values in the sort array can be date-time definition objects. In addition, for time units "month" and "day", the values can be the month or day names (case insensitive) or their 3-letter initials (e.g., "Mon", "Tue").
• null indicating no sort.

Default value: "ascending"

Note: null is not supported for row and column.

time_unit: Option<TimeUnit>

Time unit (e.g., year, yearmonth, month, hours) for a temporal field. or a temporal field that gets casted as ordinal.

Default value: undefined (None)

title: Option<String>

A title for the field. If null, the title will be removed.

Default value: derived from the field’s name and transformation function (aggregate, bin and timeUnit). If the field has an aggregate function, the function is displayed as part of the title (e.g., "Sum of Profit"). If the field is binned or has a time unit applied, the applied function is shown in parentheses (e.g., "Profit (binned)", "Transaction Date (year-month)"). Otherwise, the title is simply the field name.

Notes:

1. You can customize the default field title format by providing the [fieldTitle property in the config or fieldTitle function via the compile function’s options.

2. If both field definition’s title and axis, header, or legend title are defined, axis/header/legend title will be used.

facet_field_def_type: Type

The encoded field’s type of measurement ("quantitative", "temporal", "ordinal", or "nominal"). It can also be a "geojson" type for encoding ‘geoshape’.

Trait Implementations

impl Debug for FacetFieldDef

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FacetFieldDef

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for FacetFieldDef

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.