statsmodels.sandbox.sysreg.SUR.whiten¶ SUR.whiten(X)[source]¶ SUR whiten method. Parameters:¶ X : list of arrays¶Data to be whitened. Returns:¶ If X is the exogenous RHS of the system. np.dot(np.kron(cholsigmainv,np.eye(M)),np.diag(X)) If X is the endogenous LHS of the system.