i0e¶

paddle. i0e ( x, name=None ) [source]

The function used to calculate exponentially scaled modified Bessel function of order 0.

Equation:

$$\begin{split}I_0(x) = \sum^{\infty}_{k=0}\frac{(x^2/4)^k}{(k!)^2} \\ I_{0e}(x) = e^{-|x|}I_0(x)\end{split}$$

Parameters

• x (Tensor) – The input tensor, it’s data type should be float32, float64.

• name (str, optional) – For details, please refer to Name. Generally, no setting is required. Default: None.

Returns

• out (Tensor), A Tensor. the value of the exponentially scaled modified Bessel function of order 0 at x.

Examples

>>> import paddle

>>> x = paddle.to_tensor([0, 1, 2, 3, 4], dtype="float32")
>>> print(paddle.i0e(x))
Tensor(shape=[5], dtype=float32, place=Place(cpu), stop_gradient=True,
[0.99999994, 0.46575963, 0.30850831, 0.24300036, 0.20700191])