I have two 2x2 arrays a & b. a=(([c,d],[e,f])) b=(([g,h],[i,j])) Each of c,d,e,f,g,h,i,j are all 1xN arrays I want to matrix multiply a & b to create a 2x2 array x, where the elements of x are created with element-wise math and result in the following: x[0,0] = c*g+d*i x[0,1] = c*h+d*j x[1,0] = e*g+f*i x[1,1] = e*h+f*j
What is the simplest way to do this? I ended up doing the matrix multiplication manually as above but this doesn't scale very nicely if a & b become larger size. Cheers, Jonno. -- "If a theory can't produce hypotheses, can't be tested, can't be disproven, and can't make predictions, then it's not a theory and certainly not science." by spisska on Slashdot, Monday April 21, 2008
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