On Thursday, August 30, 2012, Neal Becker wrote: > I think this should be simple, but I'm drawing a blank > > I have 2 2d matrixes > > Matrix A has indexes (i, symbol) > Matrix B has indexes (state, symbol) > > I combined them into a 3d matrix: > > C = A[:,newaxis,:] + B[newaxis,:,:] > where C has indexes (i, state, symbol) > > That works fine. > > Now suppose I want to omit B (for debug), like: > > C = A[:,newaxis,:] > > In other words, all I want is to add a dimension into A and force it to > broadcast along that axis. How do I do that? > > np.tile would help you there, I think.
Ben Root
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