fatf.utils.metrics.metrics.negative_predictive_value

fatf.utils.metrics.metrics.negative_predictive_value(confusion_matrix)[source]

Calculates the negative predictive value for a binary confusion matrix.

See the documentation of fatf.utils.metrics.tools.validate_confusion_matrix and fatf.utils.metrics.tools.validate_confusion_matrix_size for all the possible errors and exceptions.

Parameters
confusion_matrixnumpy.ndarray

A confusion matrix based on which the metric will be computed.

Returns
metricnumber

The negative predictive value.