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