statsmodels.robust.norms.AndrewWave.rho¶
- AndrewWave.rho(z)[source]¶
The robust criterion function for Andrew’s wave.
- Parameters:
- zarray_like
1d array
- Returns:
- rho
ndarray
rho(z) = a*(1-cos(z/a)) for |z| <= a*pi
rho(z) = 2*a for |z| > a*pi
- rho
The robust criterion function for Andrew’s wave.
1d array
ndarray
rho(z) = a*(1-cos(z/a)) for |z| <= a*pi
rho(z) = 2*a for |z| > a*pi