# tensorplay.functional.lgamma

Source: https://www.tensorplay.cn/docs/generated/tensorplay.functional.lgamma.html

```python
tensorplay.functional.lgamma(input, *, out=None) → Tensor
```

Computes the natural logarithm of the absolute value of the gamma function on input.

$$\text{out}_{i} = \ln |\Gamma(\text{input}_{i})|$$

Parameters:

input ([Tensor](/docs/generated/tensorplay.Tensor.html#tensorplay.Tensor)) – the input tensor.

Keyword Arguments:

out ([Tensor](/docs/generated/tensorplay.Tensor.html#tensorplay.Tensor), optional) – the output tensor.

Example:

```
>>> a = tensorplay.arange(0.5, 2, 0.5)
>>> tensorplay.lgamma(a)
tensor([ 0.5724,  0.0000, -0.1208])
```