Envelope
Purpose
Description
Macro Synopsis
Modules
Related Functions
Purpose
Envelope of a signal
Description
"Envelope" calculates the upper or lower envelope of a given
signal by interpolating between positive or negative peaks of the signal.
The upper envelope connects the relative maxima of the signal, whereas
the lower envelope connects the relative minima of the signal. All
values below (or above in the case of the lower envelope) the given threshold are not taken into account for the
calculation of the envelope function.
Parameters of "Envelope" are
- the type of envelope envtype which is either
- "Upper" (0) or
- "Lower" (1),
- the type of interpolation interp which is either
- "Linear" (0) or
- "Spline" (1) and
- the threshold t.
Macro Synopsis
y = Envelope(x,envtype,interp,t);
signal x,y;
option envtype,interp;
float t;
Modules
Student, Professional
Related Functions
Resample, Subsample,
Unwrap, Wrap.