statsmodels.genmod.families.varfuncs.Power¶
-
class
statsmodels.genmod.families.varfuncs.Power(power=1.0)[source]¶ Power variance function
- Parameters
- power
float exponent used in power variance function
- power
Notes
- Formulas
V(mu) = numpy.fabs(mu)**power
Aliases for Power: mu = Power() mu_squared = Power(power=2) mu_cubed = Power(power=3)
Methods
call
Returns the power variance
Methods
deriv(mu)Derivative of the variance function v’(mu)