mindspore.ops.BesselI1

class mindspore.ops.BesselI1[source]

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

The formula is defined as:

\begin{array}{r} \begin{array}{ll} I_{1} (x) = i^{- 1} J_{1} (i x) = \sum_{m = 0}^{\infty} \frac{x^{2 m + 1}}{2^{2 m + 1} m! (m + 1)!} \end{array} \end{array}

where $J_{1}$ is Bessel function of the first kind, order 1.

Warning

This is an experimental API that is subject to change or deletion.

Refer to mindspore.ops.bessel_i1() for more details.

Inputs:

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

Outputs:

Tensor, has the same shape as x.

Supported Platforms:

GPU CPU

Examples

>>> import mindspore
>>> import numpy as np
>>> from mindspore import Tensor, ops
>>> bessel_i1 = ops.BesselI1()
>>> x = Tensor(np.array([0.24, 0.83, 0.31, 0.09]), mindspore.float32)
>>> output = bessel_i1(x)
>>> print(output)
[0.1208661  0.45177728 0.1568694  0.04504559]