Turned up to eleven: Fair and Balanced

Wednesday, May 15, 2002


There is a grevious matrix algebra error in the last post (which fortunately no one noticed).
In order to multiply a vector V by a Matrix A, the dimension of the vector n has to be equivalent the dimension of the matrix A nxn (only square matrices are used, I think). In any case, the multiplication is done A*V=V', where entry V'(i)=Sum(Ai*Vi) as i goes from 1 to n. I had it backwards in the original statement. Using this mechanism, the ith entry in V' is the input value into neuron i, and the thresholding rule can be applied. Just a math error, but it makes me hang my head in shame!

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