statsmodels.robust.norms.TukeyBiweight.rho¶
- TukeyBiweight.rho(z)[source]¶
The robust criterion function for Tukey’s biweight estimator
- Parameters:¶
- zarray_like
1d array
- Returns:¶
- rho
ndarray
rho(z) = -(1 - (z/c)**2)**3 * c**2/6 + c**2/6 for |z| <= R
rho(z) = 0 for |z| > R
- rho
Last update:
Sep 07, 2024