mindspore.ops.scatter_nd_min

mindspore.ops.scatter_nd_min(input_x, indices, updates, use_locking=False)[source]

Applying sparse minimum to individual values or slices in a tensor.

Using given values to update tensor value through the min operation, along with the input indices. This operation outputs the input_x after the update is done, which makes it convenient to use the updated value.

input_x has rank P and indices has rank Q where Q >= 2.

indices has shape \((i_0, i_1, ..., i_{Q-2}, N)\) where N <= P.

The last dimension of indices (with length N ) indicates slices along the N th dimension of input_x.

updates is a tensor of rank Q-1+P-N. Its shape is: \((i_0, i_1, ..., i_{Q-2}, x\_shape_N, ..., x\_shape_{P-1})\).

Parameters

  • input_x (Parameter) – The target tensor, with data type of Parameter.

  • indices (Tensor) – The index to do min operation whose data type must be mindspore.int32 or mindspore.int64. The rank of indices must be at least 2 and indices.shape[-1] <= len(shape).

  • updates (Tensor) – The tensor to do the min operation with input_x. The data type is same as input_x, and the shape is indices.shape[:-1] + x.shape[indices.shape[-1]:].

  • use_locking (bool) – Whether to protect the assignment by a lock. Default: False.

Returns

Tensor, the updated input_x, has the same shape and type as input_x.

Raises

  • TypeError – If the dtype of use_locking is not bool.

  • TypeError – If the dtype of indices is not int32 or int64.

  • TypeError – If dtype of input_x and updates are not the same.

  • ValueError – If the shape of updates is not equal to indices.shape[:-1] + x.shape[indices.shape[-1]:].

  • RuntimeError – If the data type of input_x and updates conversion of Parameter is required when data type conversion of Parameter is not supported.

Supported Platforms:

Ascend GPU CPU

Examples

>>> input_x = Parameter(Tensor(np.ones(8) * 10, mindspore.float32), name="x")
>>> indices = Tensor(np.array([[2], [4], [1], [7]]), mindspore.int32)
>>> updates = Tensor(np.array([6, 7, 8, 9]), mindspore.float32)
>>> output = ops.scatter_nd_min(input_x, indices, updates, False)
>>> print(output)
[10.  8.  6. 10.  7. 10. 10.  9.]
>>> input_x = Parameter(Tensor(np.ones((4, 4, 4)) * 10, mindspore.int32))
>>> indices = Tensor(np.array([[0], [2]]), mindspore.int32)
>>> updates = Tensor(np.array([[[1, 1, 1, 1], [2, 2, 2, 2], [3, 3, 3, 3], [4, 4, 4, 4]],
...                            [[5, 5, 5, 5], [6, 6, 6, 6], [7, 7, 7, 7], [8, 8, 8, 8]]]), mindspore.int32)
>>> output = ops.scatter_nd_min(input_x, indices, updates, False)
>>> print(output)
[[[ 1  1  1  1]
  [ 2  2  2  2]
  [ 3  3  3  3]
  [ 4  4  4  4]]
 [[10 10 10 10]
  [10 10 10 10]
  [10 10 10 10]
  [10 10 10 10]]
 [[ 5  5  5  5]
  [ 6  6  6  6]
  [ 7  7  7  7]
  [ 8  8  8  8]]
 [[10 10 10 10]
  [10 10 10 10]
  [10 10 10 10]
  [10 10 10 10]]]