tf_prev_interval/2—obtain the start and end time of the previous active interval of a time frame

The syntax for tf_prev_interval/2 is as follows:

tf_prev_interval($TIMEFRAME,$INTV)
$INTV=tf_prev_interval($TIMEFRAME)

tf_prev_interval/2 arguments

Argument	Mode	Type	Description
`$TIMEFRAME`	Input	OBJECT	Specifies the time frame object
`$INTV`	Output	LIST_OF INTEGER	Start and end time of the previous active interval

Use the tf_prev_interval/2 to obtain the start and end time of the previous active interval of time frame $TIMEFRAME in $INTV.

Argument $INTV of the primitive, has to be specified as a list of two variables.

A [0,0] value is returned if there is no previous active time frame.

tf_prev_interval($TF,[$START,$END]);