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]