MORLFREQ is the jWavelet module of jLab.

 MORLFREQ  Compute Morlet wavelet carrier frequency given peak frequency.
 
    FNU=MORLFREQ(FMAX), where FMAX is the desired peak frequency of a 
    Morlet wavelet, returns the appropriate carrier wave frequency FNU.
 
    The Morlet wavelet carrier wave and peak frequency differ on account
    of the correction term which ensures zero mean.
 
    Note that FMAX and FNU are both *radian* as in cos(omega t) and not
    cyclic as in in cos(2 pi f t).
 
    [FNU,FMIN]=MORLFREQ(FMAX) also returns the (radian) frequency at which
    the Morlet wavelet obtains a minimum, which occurs for FMIN<0.
 
    For details see Appendix A of
    
        Lilly and Olhede (2009).  Higher-order properties of analytic 
           wavelets.  IEEE Trans. Sig. Proc., 57 (1), 146--160.
 
    'morlfreq --t' runs a test.
    'morlfreq --f' generates a sample figure.
 
    Usage: fnu=morlfreq(fmax);
           [fnu,fmin]=morlfreq(fmax);
    __________________________________________________________________
    This is part of JLAB --- type 'help jlab' for more information
    (C) 2008--2013 J.M. Lilly --- type 'help jlab_license' for details