Return linear predicted values from a design matrix.
params : array-like
Parameters of a linear model
exog : array-like, optional.
Design / exogenous data. Model exog is used if None.
An array of fitted values :
Notes
If the model has not yet been fit, params is not optional.
statsmodels.regression.linear_model.WLS.loglike
statsmodels.regression.linear_model.WLS.score
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