SpearmanCorrelation(self) -> None
Metric calculates the sample Spearman correlation coefficient (r)
between two tensors. Each element in the two tensors is assumed to be
a different observation of the variable (i.e., the input tensors are
implicitly flattened into vectors and the correlation is calculated
between the vectors).
The accumulated sample Spearman correlation.
Reset any accumulators or internal state.