Given a matrix, calculate the block average of each disjoint sub-matrix of the same size. Assume that the size of the matrix along each dimension is an integer multiple of the size of the sub-matrix along the same dimension.
A = [2 0 1 3 5 7]; subsz = [1 2]; B = [1 2 6];
Hint: this is related to Problem 42854. Crunch that matrix!.
Next problem: Problem 42858. Block average ignoring NaN values