mindspore.ops.BesselJ1

class mindspore.ops.BesselJ1[source]

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

The formula is defined as:

\[\begin{split}\begin{array}{ll} \\ J_{1}(x) = \frac{1}{\pi} \int_{0}^{\pi} \cos (x \sin \theta- \theta) d \theta =\sum_{m=0}^{\infty} \frac{(-1)^{m} x^{2 m+1}}{2^{2 m+1} m !(m+1) !} \end{array}\end{split}\]

Warning

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

Inputs:

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

Outputs:

Tensor, has the same shape as x.

Raises: TypeError – If x is not a Tensor of float16, float32 or float64.

Supported Platforms:: GPU CPU

Examples

>>> import mindspore
>>> import numpy as np
>>> from mindspore import Tensor, ops
>>> bessel_j1 = ops.BesselJ1()
>>> x = Tensor(np.array([0.5, 1., 2., 4.]), mindspore.float32)
>>> output = bessel_j1(x)
>>> print(output)
[0.24226846  0.44005059  0.57672481  -0.06604333]