drift

Simulate concept drift in datastreams.

Classes

AbruptDrift	An instantaneous change of concept at position.
Concept	A concept and the number of instances it contributes to the stream.
Drift	Represents a concept drift in a DriftStream.
DriftStream	A stream composed of concepts separated by drifts.
GradualDrift	A drift where two concepts overlap over a window of instances.
IndexedCycle	An iterator that cycles through an iterable, returning tuples of (index, item).
RecurrentConceptDriftStream

Module Attributes

capymoa.stream.drift.TRANSITION_FUNCTIONS = {'linear': <function <lambda>>, 'sigmoid': <function <lambda>>}

Named transition ramps. Each maps progress through the drift window, 0.0 at the start and 1.0 at the end, to the probability that an instance is drawn from the new concept.

Functions

capymoa.stream.drift.get_class_and_init_attributes_with_values(obj)

capymoa.stream.drift.get_recurrent_concept_drift_stream_list(

concept_list: list,

max_recurrences_per_concept: int = 3,

transition_type_template: Drift = AbruptDrift(position=5000),

concept_name_list: list = None,

) → list