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

Rsqrt Activation Operator.

Please make sure input is legal in case of numeric errors.

\[out = \frac{1}{\sqrt{x}}\]
  • x (Tensor) – Input of Rsqrt operator, an N-D Tensor, with data type float32, float64 or float16.

  • name (str, optional) – Name for the operation (optional, default is None). For more information, please refer to Name.


Tensor. Output of Rsqrt operator, a Tensor with shape same as input.


>>> import paddle

>>> x = paddle.to_tensor([0.1, 0.2, 0.3, 0.4])
>>> out = paddle.rsqrt(x)
>>> print(out)
Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
[3.16227770, 2.23606801, 1.82574177, 1.58113885])