aif360.metrics.utils
.compute_num_instances¶
-
aif360.metrics.utils.
compute_num_instances
(X, w, feature_names, condition=None)[source]¶ Compute the number of instances, \(n\), conditioned on the protected attribute(s).
Parameters: - X (numpy.ndarray) – Dataset features.
- w (numpy.ndarray) – Instance weight vector.
- feature_names (list) – Names of the features.
- condition (list(dict)) – Same format as
compute_boolean_conditioning_vector()
.
Returns: int – Number of instances (optionally conditioned).