mindspore.ops.nansum

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mindspore.ops.nansum(input, axis=None, keepdims=False, *, dtype=None)[source]

Computes sum of input over a given dimension, treating NaNs as zero.

Parameters

  • input (Tensor) – The input Tensor.

  • axis (Union[int, tuple(int)], optional) – The dimensions to reduce. Supposed the rank of input is r, axis must be in the range [-rank(input), rank(input)). Default: None, all dimensions are reduced.

  • keepdims (bool, optional) – Whether the output Tensor keeps dimensions or not. Default: False.

Keyword Arguments

dtype (mindspore.dtype, optional) – The dtype of output Tensor. Default: None.

Returns

Tensor, the sum of input input in the given dimension dim, treating NaNs as zero.

  • If axis is None, keepdims is False, the output is a 0-D Tensor representing the sum of all elements in the input Tensor.

  • If axis is int, set as 2, and keepdims is False, the shape of output is \((input_1, input_3, ..., input_R)\).

  • If axis is tuple(int) or list(int), set as (2, 3), and keepdims is False, the shape of output is \((input_1, input_4, ..., input_R)\).

Raises

  • TypeError – If input is not Tensor.

  • TypeError – If keepdims is not a bool.

  • TypeError – If the dtype of input or dtype is complex type.

  • ValueError – If 'axis' not in [-rank(input), rank(input)).

Supported Platforms:

Ascend GPU CPU

Examples

>>> import mindspore
>>> import numpy as np
>>> from mindspore import Tensor, ops
>>> x = Tensor(np.array([[float("nan"), 2, 3], [1, 2, float("nan")]]), mindspore.float32)
>>> output1 = ops.nansum(x, axis=0, keepdims=False, dtype=mindspore.float32)
>>> output2 = ops.nansum(x, axis=0, keepdims=True, dtype=mindspore.float32)
>>> print(output1)
[1. 4. 3.]
>>> print(output2)
[[1. 4. 3.]]