mindspore.ops.csr_log1p

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mindspore.ops.csr_log1p(x: CSRTensor)[source]

Returns the natural logarithm of one plus the input CSRTensor element-wise.

\[out_i = ext{log_e}(x_i + 1)\]
Parameters

x (CSRTensor) – The input CSRTensor. With float16 or float32 data type. The value must be greater than -1.

Returns

CSRTensor, has the same shape as the x.

Raises

  • TypeError – If x is not a CSRTensor.

  • TypeError – If dtype of x is neither float16 nor float32.

Supported Platforms:

Ascend GPU CPU

Examples

>>> from mindspore import dtype as mstype
>>> from mindspore import Tensor, ops, CSRTensor
>>> indptr = Tensor([0, 1, 2, 2], dtype=mstype.int32)
>>> indices = Tensor([3, 0], dtype=mstype.int32)
>>> values = Tensor([-1, 2], dtype=mstype.float32)
>>> shape = (3, 4)
>>> x = CSRTensor(indptr, indices, values, shape)
>>> output = ops.csr_log1p(x)
>>> print(output.values)
[     -inf 1.0986123]