altair.CalculateTransform

class altair.CalculateTransform(calculate=Undefined, **kwds)

CalculateTransform schema wrapper

Mapping(required=[calculate, as])

Attributes

calculatestring

A expression string. Use the variable datum to refer to the current data object.

asFieldName

The field for storing the computed formula value.

__init__(calculate=Undefined, **kwds)

Methods

__init__([calculate])
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