/*********************** self documentation **********************/string sdoc = "\								\n\SUFRAC -- take general (fractional) time derivative 		\n\	    or integral of data.  Input is TIME DOMAIN data.	\n\								\n\sufrac power= [optional parameters] <indata >outdata 		\n\								\n\Required parameters:						\n\	power=		exponent of (-i*omega)	 		\n\			=0  ==> costly do-nothing		\n\			>0  ==> differentiation			\n\			<0  ==> integration			\n\	if dt is not set in header, then dt is mandatory	\n\								\n\Optional parameters:						\n\	sign=-1			sign in front of i * omega	\n\	dt = (from header)	time sample rate (in seconds)	\n\								\n\The filter is applied in frequency domain.			\n\								\n\";/**************** end self doc ***********************************/