I don't see a SciPy equivalent for the MATLAB/Octave `subspace` to compute the subspace angle between two matrices. Did I miss it somewhere? If we don't have it and people think it would be worthwhile, I could add one. A computational formula is given on page 2014 of this article: http://epubs.siam.org/doi/abs/10.1137/S1064827500377332 Eric