# nanquantile¶

paddle. nanquantile ( x, q, axis=None, keepdim=False, interpolation='linear' ) [source]

Compute the quantile of the input as if NaN values in input did not exist. If all values in a reduced row are NaN, then the quantiles for that reduction will be NaN.

Parameters
• x (Tensor) – The input Tensor, it’s data type can be float32, float64, int32, int64.

• q (int|float|list|Tensor) – The q for calculate quantile, which should be in range [0, 1]. If q is a list or a 1-D Tensor, each element of q will be calculated and the first dimension of output is same to the number of `q` . If q is a 0-D Tensor, it will be treated as an integer or float.

• axis (int|list, optional) – The axis along which to calculate quantile. `axis` should be int or list of int. `axis` should be in range [-D, D), where D is the dimensions of `x` . If `axis` is less than 0, it works the same way as \(axis + D\). If `axis` is a list, quantile is calculated over all elements of given axises. If `axis` is None, quantile is calculated over all elements of `x`. Default is None.

• keepdim (bool, optional) – Whether to reserve the reduced dimension(s) in the output Tensor. If `keepdim` is True, the dimensions of the output Tensor is the same as `x` except in the reduced dimensions(it is of size 1 in this case). Otherwise, the shape of the output Tensor is squeezed in `axis` . Default is False.

• interpolation (str, optional) – The interpolation method to use when the desired quantile falls between two data points. Must be one of linear, higher, lower, midpoint and nearest. Default is linear.

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

Returns

Tensor, results of quantile along `axis` of `x`.

Examples

```>>> import paddle

>>> x = paddle.to_tensor(
...     [[0, 1, 2, 3, 4],
...      [5, 6, 7, 8, 9]],
...     dtype="float32")
>>> x[0,0] = float("nan")

>>> y1 = paddle.nanquantile(x, q=0.5, axis=[0, 1])
>>> print(y1)
Tensor(shape=[], dtype=float32, place=Place(cpu), stop_gradient=True,
5.)

>>> y2 = paddle.nanquantile(x, q=0.5, axis=1)
>>> print(y2)
Tensor(shape=[2], dtype=float32, place=Place(cpu), stop_gradient=True,
[2.50000000, 7.        ])

>>> y3 = paddle.nanquantile(x, q=[0.3, 0.5], axis=0)
>>> print(y3)
Tensor(shape=[2, 5], dtype=float32, place=Place(cpu), stop_gradient=True,
[[5.        , 2.50000000, 3.50000000, 4.50000000, 5.50000000],
[5.        , 3.50000000, 4.50000000, 5.50000000, 6.50000000]])

>>> y4 = paddle.nanquantile(x, q=0.8, axis=1, keepdim=True)
>>> print(y4)
Tensor(shape=[2, 1], dtype=float32, place=Place(cpu), stop_gradient=True,
[[3.40000000],
[8.20000000]])

>>> nan = paddle.full(shape=[2, 3], fill_value=float("nan"))
>>> y5 = paddle.nanquantile(nan, q=0.8, axis=1, keepdim=True)
>>> print(y5)
Tensor(shape=[2, 1], dtype=float32, place=Place(cpu), stop_gradient=True,
[[nan],
[nan]])
```