jaeagain.blogg.se - Lite definition

Vega-Lite automatically infers data types in many cases as discussed below. It can also be a "geojson" type for encoding ‘geoshape’. The type of measurement ( "quantitative", "temporal", "ordinal", or "nominal") for the encoded field or constant value ( datum). 2) field is not required if aggregate is count. See more details about escaping in the field documentation. 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\\").

) and brackets ( ) can be used to access nested objects (e.g., "field": "foo.bar" and "field": "foo"). 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. To facilitate data exploration, Vega-Lite also provides inline field transforms ( aggregate, bin, sort, stack, and timeUnit) as a part of a field definition in addition to the top-level transform.Īll field definitions support the following properties: Property To encode a particular field in the data set with an encoding channel, the channel’s field definition must describe the field name and its data type. Datum definition, which describes a constant data value encoded via a scale.įield Definition // Specification of a Single View.Value definition, which describes an encoded constant visual value.

Field definition, which describes the data field encoded by the channel.

Text and Tooltip Channels: text, tooltipĮach channel definition object must be one of the following:.

Mark Property Channels: angle, color (and fill / stroke), opacity, fillOpacity, strokeOpacity, shape, size, strokeDash, strokeWidth.

Geographic Position Channels: longitude, latitude, longitude2, latitude2.

Polar Position Channels: theta, theta2, radius, radius2.

Position Offset Channels: xOffset, yOffset.

Position Channels: x, y, x2, y2, 圎rror, yError, 圎rror2, yError2.

Vega-Lite supports the following groups of encoding channels The keys in the encoding object are encoding channels. The encoding property of a single view specification represents the mapping between encoding channels (such as x, y, or color) and data fields, constant visual values, or constant data values (datum). An integral part of the data visualization process is encoding data with visual properties of graphical marks.