DECONV Deconvolution and polynomial division.
    [Q,R] = DECONV(B,A) deconvolves vector A out of vector B.  The result
    is returned in vector Q and the remainder in vector R such that
    B = conv(A,Q) + R.
 
    If A and B are vectors of polynomial coefficients, deconvolution
    is equivalent to polynomial division.  The result of dividing B by
    A is quotient Q and remainder R.
 
    See also CONV, RESIDUE.