mindspore.ops.BesselI1e

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class mindspore.ops.BesselI1e[source]

Computes exponential scaled modified Bessel function of the first kind, order 1 element-wise.

The formula is defined as:

\[\begin{split}\begin{array}{ll} \\ \text I_{1}e(x)=e^{(-|x|)} * I_{1}(x)=e^{(-|x|)} * \sum_{m=0}^ {\infty} \frac{x^{2m+1}}{2^{2m+1} m ! (m+1) !} \end{array}\end{split}\]

where \(I_{1}\) is modified Bessel function of the first kind, order 1.

Inputs:

  • x (Tensor) - The input tensor. Data type must be float16 or float32, float64.

Outputs:

Tensor, has the same shape as x.

Raises

  • TypeError – If x is not a Tensor.

  • TypeError – If dtype of x is not float16, float32 or float64.

Supported Platforms:

Ascend GPU CPU

Examples

>>> import mindspore
>>> import numpy as np
>>> from mindspore import Tensor, ops
>>> bessel_i1e = ops.BesselI1e()
>>> x = Tensor(np.array([0.24, 0.83, 0.31, 0.09]), mindspore.float32)
>>> output = bessel_i1e(x)
>>> print(output)
[0.09507662 0.19699717 0.11505538 0.04116856]