pyriemann.geometry.tangentspace.norm¶

pyriemann.geometry.tangentspace.norm(X, Cref, metric='riemann')[source]¶

Norm according to a specified metric.

It calculates the norm of the matrix \(\mathbf{X}\) in the tangent space at \(\mathbf{C}_\text{ref}\), according to a specified metric.

Parameters:

Xndarray, shape (…, n, n): Matrices in the tangent space at Cref.
Crefndarray, shape (n, n) | None: Reference matrix.
metricstring | callable, default=”riemann”: Metric used for norm, can be: “euclid”, “logeuclid”, “riemann”, or a callable function.

Returns: