>> X_{ijk} = \sum_{l} A_{il}*B_{jl}*C_{kl}
>
> (A[:,newaxis,newaxis]*B[newaxis,:,newaxis]*C[newaxis,newaxis,:]).sum(axis=-1)Thanks for the quick solution and practical exercise in broadcasting! :-) However, this creates a temporary 4-array, right? Is there a way of avoiding this memory requirement? - Hagen _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
