FITC_network.py 文件源码

def compute_phi_posterior(self):
        logZ_posterior = 0
        for i in range(self.no_layers):

            Dout_i = self.layer_sizes[i+1]
            for d in range(Dout_i):
                mud_val = self.mu[i][d]
                Sud_val = self.Su[i][d]
                (sign, logdet) = np.linalg.slogdet(Sud_val)
                # print 'phi_poste: ', 0.5 * logdet, 0.5 * np.sum(mud_val * spalg.solve(Sud_val, mud_val.T))
                logZ_posterior += 0.5 * logdet
                logZ_posterior += 0.5 * np.sum(mud_val * spalg.solve(Sud_val, mud_val.T))
        return logZ_posterior