mindspore.ops.TensorScatterSub
- class mindspore.ops.TensorScatterSub[源代码]
根据指定的更新值和输入索引,进行减法运算更新输入Tensor的值。当同一索引有不同更新值时,更新的结果将是累积减法的结果。此操作与
mindspore.ops.ScatterNdSub
类似,只是更新后的结果是通过算子output返回,而不是直接原地更新input。更多参考详见 :func:mindspore.ops.tensor_scatter_sub。
- 支持平台:
Ascend
GPU
CPU
样例:
>>> input_x = Tensor(np.array([[-0.1, 0.3, 3.6], [0.4, 0.5, -3.2]]), mindspore.float32) >>> indices = Tensor(np.array([[0, 0], [0, 0]]), mindspore.int32) >>> updates = Tensor(np.array([1.0, 2.2]), mindspore.float32) >>> # Next, demonstrate the approximate operation process of this operator: >>> # 1, indices[0] = [0, 0], indices[1] = [0, 0] >>> # 2, And input_x[0, 0] = -0.1 >>> # 3, So input_x[indices] = [-0.1, -0.1] >>> # 4, Satisfy the above formula: input_x[indices].shape=(2) == updates.shape=(2) >>> op = ops.TensorScatterSub() >>> # 5, Perform the subtract operation for the first time: >>> # first_input_x = input_x[0][0] - updates[0] = [[-1.1, 0.3, 3.6], [0.4, 0.5, -3.2]] >>> # 6, Perform the subtract operation for the second time: >>> # second_input_x = input_x[0][0] - updates[1] = [[-3.3, 0.3, 3.6], [0.4, 0.5, -3.2]] >>> output = op(input_x, indices, updates) >>> print(output) [[-3.3000002 0.3 3.6 ] [ 0.4 0.5 -3.2 ]]