Take steepest ascent steps to increase the log-likelihood function.
params : array-like
The starting point of the optimization.
n_iter: non-negative integer :
Return once this number of iterations have occured.
A MixedLMParameters object containing the final value of the :
optimization. :
statsmodels.regression.mixed_linear_model.MixedLM.starting_values
statsmodels.regression.mixed_linear_model.MixedLMResults
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