Numpy: Multiplying arrays of matrices

Colin J. Williams cjwilliams43 at gmail.com
Wed Sep 15 18:36:16 CEST 2010


On 14-Sep-10 19:54 PM, Gregory Ewing wrote:
> Suppose I have two N+2 dimensional arrays, representing
> N-d arrays of 2-d matrices. I want to perform matrix
> multiplication between corresponding matrices in these
> arrays.
>
> I had thought that dot() might do this, but it appears
> not, because e.g. applying it to two 3-d arrays gives
> a 4-d array, not another 3-d array.
>
> I'd also like to be able to find the inverse of each
> matrix in one of these arrays, but again, inv() doesn't
> do what I want -- it only works on 2-d arrays.
>
> Any thoughts on how to achieve these things using numpy
> functions?
>


There is a Matrix sub-class which permit you to do that sort of thimg.

Colin W.



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