第18章概率潜在语义分析模型代码有误

[saikikuu]

        # update P(w|z)
        for zi in range(self.K):
            sum2 = np.zeros((n_w))
            for wi in range(n_w):
                for di in range(n_d):
                    sum2[wi] = sum2[wi] + X[di, wi] * p_z_dw[di, wi, zi]
            sum1 = np.sum(sum2)
            if sum1 == 0:
                sum1 = 1
                for wi in range(n_w):
                    p_w_z[zi, wi] = sum2[wi] / sum1

是不是应改为

       # update P(w|z)
        for zi in range(self.K):
            sum2 = np.zeros((n_w))
            for wi in range(n_w):
                for di in range(n_d):
                    sum2[wi] = sum2[wi] + X[di, wi] * p_z_dw[di, wi, zi]
            sum1 = np.sum(sum2)
            if sum1 == 0:
                sum1 = 1
            for wi in range(n_w):
                p_w_z[zi, wi] = sum2[wi] / sum1

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