pyriemann.utils.distance.distance_riemann¶

pyriemann.utils.distance.distance_riemann(A, B)[source]¶

Riemannian distance between two covariance matrices A and B.

$$d = {\left( \sum_i \log(\lambda_i)^2 \right)}^{-1/2}$$

where $\lambda_i$ are the joint eigenvalues of A and B

Parameters:	A – First covariance matrix B – Second covariance matrix
Returns:	Riemannian distance between A and B