def _compute_b(self, D):
        self.b = np.dot(D, np.dot(np.dot(self.Z.T, self.W), self.r))
Loads crentials for a given profile. Profiles are stored in
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/sandbox/panel/mixed.py/Unit._compute_b--crossover with--dataset/ETHPy150Open yhat/db.py/db/db.py/DB.load_credentials