# pyriemann.utils.mean.mean_harmonic¶

pyriemann.utils.mean.mean_harmonic(covmats, sample_weight=None)[source]

Return the harmonic mean of a set of covariance matrices.

$\mathbf{C} = (\frac{1}{N} \sum_i {\mathbf{C}_i}^{-1})^{-1}$
Parameters: covmats – Covariance matrices set, Ntrials X Nchannels X Nchannels sample_weight – the weight of each sample the mean covariance matrix