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).