data:dutycycle (PROC) manual page

data:dutycycle - duty-cycle, frequency, period at each time-point (Decida Procedure)

          data:dutycycle d signal args

d	data object
signal	name of signal in advplot output file
args	OPTIONS

-level level	specify crossing level (default is (max-min)/2)
-time time	specify time column (default is TIME)

returns data object with time, period, frequency, duty-cycle columns

             set d2 [d1 dutycycle VP]

Richard Booth