[R] linear predicted values of the index function in an ordered probit model

From: Martin Spindler <Martin.Spindler_at_gmx.de>
Date: Mon, 28 Jun 2010 16:58:25 +0200


currently I am estimating an ordered probit model with the function polr (MASS package).

Is there a simple way to obtain values for the prediction of the index function ($X*\hat{\beta}$)?

 (E..g. in the GLM function there is the linear.prediction value for this purpose).  

If not, is there another function / package where this feature is implemented?  

Thank you very much for your answer in advance!  



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