MORSEDERIV is the jWavelet module of jLab.

 MORSEDERIV  Frequency-domain derivatives of generalized Morse wavelets.
 
    DCELL=MORSEDERIV(N,GAMMA,BETA,OMEGA) returns the first N normalized
    frequency derivatives of the lowest-order generalized Morse wavelet 
    specified by parameters GAMMA and BETA, at the radian frequency OMEGA.
 
    DCELL is a cell array with DCELL{N} containing the Nth derivative.
 
    This derivative is defined as
 
            dn = ( omega^n / psi ) * ( d^n psi / d omega^n )
 
    where omega is the radian frequency and psi is the wavelet.
  
    N must be a scalar. The other input parameters must either be matrices
    of the same size, or some may be matrices and the others scalars.
 
    DCELL=MORSEDERIV(N,GAMMA,BETA) evaluates the derivative at the peak
    frequency by default.
 
    For details see
 
        Lilly and Olhede (2009).  Higher-order properties of analytic 
            wavelets.  IEEE Trans. Sig. Proc., 57 (1), 146--160.
 
    See also MORSEWAVE, MORSEMOM, BELLPOLY.
 
    'morsewave --t' runs a test.
 
    Usage: dcell=morsederiv(4,gamma,beta,omega);
           dcell=morsederiv(4,gamma,beta);
    _________________________________________________________________
    This is part of JLAB --- type 'help jlab' for more information
    (C) 2007--2009 J.M. Lilly --- type 'help jlab_license' for details