joddiy edited a comment on issue #541: added 4d test on batchnorm URL: https://github.com/apache/incubator-singa/pull/541#issuecomment-540600410 hi, shicong, the result still has a little error, please check with the following case: ``` def _batchnorm_test_mode(x, s, bias, mean, var, epsilon=1e-5): # type: ignore dims_x = len(x.shape) dim_ones = (1,) * (dims_x - 2) s = s.reshape(-1, *dim_ones) bias = bias.reshape(-1, *dim_ones) mean = mean.reshape(-1, *dim_ones) var = var.reshape(-1, *dim_ones) return s * (x - mean) / np.sqrt(var + epsilon) + bias # input size: (1, 2, 1, 3) x = np.array([[[[-1, 0, 1]], [[2, 3, 4]]]]).astype(np.float32) s = np.array([1.0, 1.5]).astype(np.float32) bias = np.array([0, 1]).astype(np.float32) mean = np.array([0, 3]).astype(np.float32) var = np.array([1, 1.5]).astype(np.float32) y = _batchnorm_test_mode(x, s, bias, mean, var).astype(np.float32) ```
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