Spot operator: opHadamard Spot Home Page
opHadamard
 opHadamard   Hadamard matrix.
 
    opHadamard(N) creates a Hadamard operator for vectors of length
    N, where N is a power of two. Multiplication is done using a fast
    routine.
 
    opHadamard(N,NORMALIZED) is the same as above, except that the
    columns are scaled to unit two-norm. By default, the NORMALIZED
    flag is set to FALSE.