pyriemann.utils.tangentspace.tangent_space¶
- pyriemann.utils.tangentspace.tangent_space(X, Cref, *, metric='riemann')¶
Transform matrices into tangent vectors.
Transform matrices into tangent vectors, according to a reference matrix Cref and to a specific logarithmic map.
- Parameters:
- Xndarray, shape (…, n, n)
Matrices in manifold.
- Crefndarray, shape (n, n)
Reference matrix.
- metricstring | callable, default=”riemann”
Metric used for logarithmic map, can be: “euclid”, “logchol”, “logeuclid”, “riemann”, “wasserstein”, or a callable function.
- Returns:
- Tndarray, shape (…, n * (n + 1) / 2)
Tangent vectors.