Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Overview of generic features and their abbreviations.
| Feature name | Abbreviation |
|---|---|
| Mean | mean |
| Standard deviation | std |
| Coefficient of variation | cov |
| Maximum value | max_val |
|
Number of crossings through signal’s mean value |
m_cross |
| Number of zero crossings | z_cross |
| Entropy | entropy |
| Absolute energy | abs_energy |
| Fast Fourier transform (FFT) spectrum centroid | fft_centroid |
| FFT spectrum variance | fft_var |
| FFT spectrum skewness | fft_skew |
| FFT spectrum kurtosis | fft_kurt |
