STARMS

Purpose:

Calculates the short time averaged RMS series.

Syntax:

STARMS(series, intv)

series

-

An input series

intv

-

Optional. An integer, the duration of each RMS segment. Defaults to 1.0 second.

Returns:

A series, the short time averaged RMS series.

Example:

W1: gsin(1000, .01, 1)

W2: starms(W1)

 

W2 consists of a 10 point series where each point has a value of 0.707107, the RMS value of each 1 second segment of W1.

Example:

W4: starms(W1, 0.1)

 

W4 consists of a 10 point series where the values now vary since the RMS value of W1 varies over a 0.1 second interval.

Remarks:

The number of segments used to calculate the RMS value is

 

segsize = int(interval / deltax(s))

 

where s is the input series.

 

The segments are non-overlapping.

See Also:

COLMEAN

MOVRMS

RMS