adaptive_avg_pool1d

paddle.nn.functional. adaptive_avg_pool1d ( x, output_size, name=None ) [源代码]

根据 output_size 对 Tensor x 计算 1D 自适应平均池化。

注解

详细请参考对应的 Class 请参考:AdaptiveAvgPool1D

参数

  • x (Tensor) - 自适应平均池化的输入,它是形状为 \([N,C,L]\) 的 3-D Tensor,其中 \(N\) 是批大小,\(C\) 是通道数而 \(L\) 是输入特征的长度,其数据类型为 float32 或 float64。

  • output_size (int) - 输出特征的长度,数据类型为 int。

  • name (str,可选) - 具体用法请参见 Name,一般无需设置,默认值为 None。

返回

Tensor,计算 1D 自适应平均池化的结果,数据类型与输入相同。

代码示例

# average adaptive pool1d
# suppose input data in shape of [N, C, L], `output_size` is m or [m],
# output shape is [N, C, m], adaptive pool divide L dimension
# of input data into m grids averagely and performs poolings in each
# grid to get output.
# adaptive max pool performs calculations as follow:
#
#     for i in range(m):
#         lstart = floor(i * L / m)
#         lend = ceil((i + 1) * L / m)
#         output[:, :, i] = sum(input[:, :, lstart: lend])/(lstart - lend)
#
import paddle
import paddle.nn.functional as F

data = paddle.uniform([1, 3, 32])
pool_out = F.adaptive_avg_pool1d(data, output_size=16)
# pool_out shape: [1, 3, 16])