Hjorth activity (variance)

First Hjorth parameter: signal variance.

Usage

morie_dsp_hjorth_activity(x)

Arguments

x

Numeric vector.

Value

Scalar.

References

Rangayyan & Krishnan (2015), Ch. 5, sec. 5.5; Hjorth (1970).

Examples

set.seed(3)
x <- rnorm(100)
morie_dsp_hjorth_activity(x)  # equals var(x)
#> [1] 0.7328675