GLS.hessian_factor(params, scale=None, observed=True)
[source]
Weights for calculating Hessian
Parameters: 


Returns: 
hessian_factor – A 1d weight vector used in the calculation of the Hessian. The hessian is obtained by 
Return type: 
ndarray, 1d 
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© 2006–2008 Scipy Developers
© 2006 Jonathan E. Taylor
Licensed under the 3clause BSD License.
http://www.statsmodels.org/stable/generated/statsmodels.regression.linear_model.GLS.hessian_factor.html