altair.JoinAggregateFieldDef

class altair.JoinAggregateFieldDef(op=Undefined, field=Undefined, **kwds)

JoinAggregateFieldDef schema wrapper

Mapping(required=[op, as])

Parameters:

opAggregateOp

The aggregation operation to apply (e.g., "sum", "average" or "count" ). See the list of all supported operations here.

fieldFieldName

The data field for which to compute the aggregate function. This can be omitted for functions that do not operate over a field such as "count".

asFieldName

The output name for the join aggregate operation.

__init__(op=Undefined, field=Undefined, **kwds)

Methods

__init__([op, field])
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