Envelope('Expression','Interval')

Arguments

'Expression'	Signal or expression around which to form the envelope curve
'Interval'	X-axis interval

Description

This function calculates the upper envelope of a signal or expression. The envelope is formed by linking the high peaks of the signal curve. The parameter 'Interval' sets the quality of the envelope curve. Without this parameter, only the maximum peak is considered over the entire recording length of the signal. The parameter 'Interval' specifies the length of an interval in base units of X-axis (s, m, Hz, 1/m). By using this parameter, the peaks inside the interval are considered too and the envelope nestles against the signal curve.

Tip
	To form an envelope along the lower side of the signal curve, you can enter the same function in the following form. In this case the low peaks (minimum values) will be linked. -Envelope (-'Expression','Interval')