# 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 Riemannian distance between A and B