DATA arguments must either all be sequences or all be arrays of the same shape. Returns the matrix product of matrices a and b. DIM initialized using sequence DATA in row major order. Returns the generalized outer product of x and y, using fcn. A is a matrix of real numbers with at least as many rows as columns.
B can be a sequence or a matrix.
Returns the sum of all the elements of its arguments. A is a matrix of real numbers with at least as many rows as columns.