statsmodels.genmod.families.varfuncs.VarianceFunction¶

class statsmodels.genmod.families.varfuncs.VarianceFunction[source]¶

Relates the variance of a random variable to its mean. Defaults to 1.

call()¶

Returns an array of ones that is the same shape as mu

Notes

After a variance function is initialized, its call method can be used.

Alias for VarianceFunction: constant = VarianceFunction()

See also

statsmodels.genmod.families.family

Methods

deriv(mu)

Derivative of the variance function v'(mu)