mindspore.ops.igamma

mindspore.ops.igamma(input, other)

Calculates lower regularized incomplete Gamma function.

If we define input as a and other as x, the lower regularized incomplete Gamma function is defined as:

$$P(a,x)=Gamma(a,x)/Gamma(a)=1-Q(a,x)$$

where

$$Gamma(a,x)={\int }_0^x{t}^{a-1}{\exp }^{-t}dt$$

is the lower incomplete Gamma function.

Above $Q(a,x)$ is the upper regularized complete Gamma function.

Warning

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

Parameters

• input (Tensor) – The first input tensor.

• other (Tensor) – The second input tensor.

Returns

Tensor

Supported Platforms:

Ascend GPU CPU

Examples

>>> import mindspore
>>> input = mindspore.tensor([2.0, 4.0, 6.0, 8.0])
>>> other = mindspore.tensor([2.0, 3.0, 4.0, 5.0])
>>> output = mindspore.ops.igamma(input, other)
>>> print(output)
[0.5939941  0.35276785 0.21486954 0.13337176]