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Negative squared distances - Mahalanobis distance - Discriminant analysis



When choosing "Qadratic, Different covariances" in Discriminant method in the Discriminant analysis platform, the squared distances can become negative. It seems this is due to the last constant added or subtracted in the formula (in the saved formulas). Can somebody point to how this constant is calculated? Could not find anything in the documentation or other places.


Regards, Thomas

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