altair.UnitSpec

class altair.UnitSpec(mark=Undefined, data=Undefined, description=Undefined, encoding=Undefined, height=Undefined, name=Undefined, projection=Undefined, selection=Undefined, title=Undefined, transform=Undefined, view=Undefined, width=Undefined, **kwds)

UnitSpec schema wrapper

Mapping(required=[mark]) A unit specification, which can contain either primitive marks or composite marks.

Attributes

markAnyMark

A string describing the mark type (one of "bar", "circle", "square", "tick", "line", "area", "point", "rule", "geoshape", and "text" ) or a mark definition object.

dataanyOf(Data, None)

An object describing the data source. Set to null to ignore the parent’s data source. If no data is set, it is derived from the parent.

descriptionstring

Description of this mark for commenting purpose.

encodingEncoding

A key-value mapping between encoding channels and definition of fields.

heightanyOf(float, string, Step)

Deprecated: Please avoid using width in a unit spec that’s a part of a layer spec.

namestring

Name of the visualization for later reference.

projectionProjection

An object defining properties of geographic projection, which will be applied to shape path for "geoshape" marks and to latitude and "longitude" channels for other marks.

selectionMapping(required=[])

A key-value mapping between selection names and definitions.

titleanyOf(Text, TitleParams)

Title for the plot.

transformList(Transform)

An array of data transformations such as filter and new field calculation.

viewViewBackground

Deprecated: Please avoid using width in a unit spec that’s a part of a layer spec.

widthanyOf(float, string, Step)

Deprecated: Please avoid using width in a unit spec that’s a part of a layer spec.

__init__(mark=Undefined, data=Undefined, description=Undefined, encoding=Undefined, height=Undefined, name=Undefined, projection=Undefined, selection=Undefined, title=Undefined, transform=Undefined, view=Undefined, width=Undefined, **kwds)

Methods

__init__([mark, data, description, ...])
copy([deep, ignore])	Return a copy of the object
from_dict(dct[, validate, _wrapper_classes])	Construct class from a dictionary representation
from_json(json_string[, validate])	Instantiate the object from a valid JSON string
resolve_references([schema])	Resolve references in the context of this object's schema or root schema.
to_dict([validate, ignore, context])	Return a dictionary representation of the object
to_json([validate, ignore, context, indent, ...])	Emit the JSON representation for this object as a string.
validate(instance[, schema])	Validate the instance against the class schema in the context of the rootschema.
validate_property(name, value[, schema])	Validate a property against property schema in the context of the rootschema