statsmodels.genmod.qif.QIF.objective¶

QIF.objective(params)[source]¶

Calculate the gradient of the QIF objective function.

Parameters:¶

paramsarray_like

The model parameters at which the gradient is evaluated.

Returns:¶

gradarray_like

The gradient vector of the QIF objective function.

gn_derivarray_like

The gradients of each estimating equation with respect to the parameter.