mindspore.ops.bessel_i1

mindspore.ops.bessel_i1(x)[source]

Computes the first order modified Bessel function of the first kind for each element input.

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

Parameters: x (Tensor) – The input tensor.
Returns: Tensor

Supported Platforms:: GPU CPU

Examples

>>> import mindspore
>>> x = mindspore.tensor([-1., -0.5, 0.5, 1.])
>>> output = mindspore.ops.bessel_i1(x)
>>> print(output)
[-0.5651591  -0.25789431  0.25789431  0.5651591]