def project_whitened(self, instance):
        return self.project_whitened_vector(instance.as_vector())
Utility function to compute X^tWX for Unit instance.
dataset/ETHPy150Open menpo/menpo/menpo/model/pca.py/PCAModel.project_whitened--crossover with--dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/sandbox/panel/mixed.py/Unit.compute_xtwx