(numeric())
True (observed) values.
Must have the same length as response.
response
(numeric())
Predicted response values.
Must have the same length as truth.
sample_weights
(numeric())
Vector of non-negative and finite sample weights.
Must have the same length as truth.
The vector gets automatically normalized to sum to one.
Defaults to equal sample weights.
na_value
(numeric(1))
Value that should be returned if the measure is not defined for the input
(as described in the note). Default is NaN.