As someone who is very used to thinking in terms of matrices and who just went through the adjustment of translating matlab-like code to numpy, I found the current matrix module to be confusing. It's poor integration with the rest of numpy/scipy (in particular, scipy.optimize.fmin_cg) made it more difficult to use than it was worth. I'd rather have "matrix" and/or "matrix multiplication" sections of the documentation explain how to do typical, basic matrix operations with nparray, dot, T, and arr[None,:]. I think a matrix class would still be worthwhile for findability, but it should simply serve as documentation for how to do matrix stuff with nparray.
Cheers, Jason -- Jason Rennie Research Scientist, ITA Software 617-714-2645 http://www.itasoftware.com/
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