array_ops.py 文件源码

def one_hot_matrix(tensor_in, num_classes, on_value=1.0, off_value=0.0):
  """Encodes indices from given tensor as one-hot tensor.

  TODO(ilblackdragon): Ideally implementation should be
  part of TensorFlow with Eigen-native operation.

  Args:
    tensor_in: Input tensor of shape [N1, N2].
    num_classes: Number of classes to expand index into.
    on_value: Tensor or float, value to fill-in given index.
    off_value: Tensor or float, value to fill-in everything else.
  Returns:
    Tensor of shape [N1, N2, num_classes] with 1.0 for each id in original
    tensor.
  """
  return array_ops_.one_hot(
      math_ops.cast(tensor_in, dtypes.int64), num_classes, on_value, off_value)