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Features that are preceded by V are called vector functions. These are used to make calculations with respect to a number of sample points.

Funktion	Beskrivning
VAVEL(ID;n)	Returns the average of 2n + 1 samples at each measurement point. Example: VAVEL (ID1; 5) returns an average of 11 points, five back five forward and the point calculated.
VDER(ID)	Returns the derivative calculated as follows: (F (t-2DT) - 8 * f (t-dt) + 8 * f (t + dt)) - f (t + 2DT)) / 12 Ex: VDER (ID1)
VDER2(ID)	Returns the second derivative calculated as the slope of the chord from t to t + dt dt of the first derivative. Ex: VDER2(ID1)
VMEDL(ID;n)	Returns the median of 2n + 1 values Ex: VMEDL (ID1; 3) results in a median of 7 values from channel 1
VPOS(ID)	Returns the relative time as a float. The unit is in days. Ex: VPOS (ID1) ® instance. 2.1323 which means 2 days, 3 hours, 10 m and 31 seconds (approximately).
VREV(ID)	Returns the value of a curve with inverse time. The end time specified as the start time.
VSIZE(ID)	Returns a float for the length of the recording.
VSKEWL(ID;n)	Creates an offset curve "x" number of sample points Ex: VSKEWL (ID1; 5)
VSKEWT(ID;t)	Creates an offset curve "t" number of seconds. Do not confuse this with the "Shift" in the info table. It has a similar function.