From dc2ff42e20d72a449b200da0522b55a53b28091d Mon Sep 17 00:00:00 2001 From: dengkaipeng Date: Thu, 13 Dec 2018 23:14:10 +0800 Subject: [PATCH] add math in python examples. test=develop --- python/paddle/fluid/layers/nn.py | 40 +++++++++++++++++++++++++++----- 1 file changed, 34 insertions(+), 6 deletions(-) diff --git a/python/paddle/fluid/layers/nn.py b/python/paddle/fluid/layers/nn.py index 07fc4ccc6b..4a557ce247 100644 --- a/python/paddle/fluid/layers/nn.py +++ b/python/paddle/fluid/layers/nn.py @@ -2536,16 +2536,28 @@ def adaptive_pool2d(input, ValueError: 'pool_size' should be a list or tuple with length as 2. Examples: - .. code-block:: python + # suppose input data in shape of [N, C, H, W], `pool_size` is [m, n], + # output shape is [N, C, m, n], adaptive pool divide H and W dimentions + # of input data into m * n grids averagely and performs poolings in each + # grid to get output. + # adaptive average pool performs calculations as follow: + # + # for i in range(m): + # for j in range(n): + # hstart = floor(i * H / m) + # hend = ceil((i + 1) * H / m) + # wstart = floor(i * W / n) + # wend = ceil((i + 1) * W / n) + # output[:, :, i, j] = avg(input[:, :, hstart: hend, wstart: wend]) + # data = fluid.layers.data( name='data', shape=[3, 32, 32], dtype='float32') pool_out = fluid.layers.adaptive_pool2d( input=data, pool_size=[3, 3], - pool_type='max', - require_index=False) + pool_type='avg') """ if pool_type not in ["max", "avg"]: raise ValueError( @@ -2632,16 +2644,32 @@ def adaptive_pool3d(input, ValueError: 'pool_size' should be a list or tuple with length as 2. Examples: - .. code-block:: python + # suppose input data in shape of [N, C, D, H, W], `pool_size` is [l, m, n], + # output shape is [N, C, l, m, n], adaptive pool divide D, H and W dimentions + # of input data into l * m * n grids averagely and performs poolings in each + # grid to get output. + # adaptive average pool performs calculations as follow: + # + # for i in range(l): + # for j in range(m): + # for k in range(n): + # dstart = floor(i * D / l) + # dend = ceil((i + 1) * D / l) + # hstart = floor(j * H / m) + # hend = ceil((j + 1) * H / m) + # wstart = floor(k * W / n) + # wend = ceil((k + 1) * W / n) + # output[:, :, i, j, k] = + # avg(input[:, :, dstart:dend, hstart: hend, wstart: wend]) + # data = fluid.layers.data( name='data', shape=[3, 32, 32], dtype='float32') pool_out, mask = fluid.layers.adaptive_pool3d( input=data, pool_size=[3, 3], - pool_type='max', - require_index=True) + pool_type='avg') """ if pool_type not in ["max", "avg"]: raise ValueError( -- GitLab