[ torch 参数更多 ]torch.nn.NLLLoss
torch.nn.NLLLoss
torch.nn.NLLLoss(weight=None,
size_average=None,
ignore_index=- 100,
reduce=None,
reduction='mean')
paddle.nn.NLLLoss
paddle.nn.NLLLoss(weight=None,
ignore_index=- 100,
reduction='mean',
name=None)
PyTorch 相比 Paddle 支持更多其他参数,具体如下:
参数映射
| PyTorch | PaddlePaddle | 备注 |
|---|---|---|
| weight | weight | 表示每个类别的权重。 |
| size_average | - | PyTorch 已弃用, Paddle 无此参数,需要转写。 |
| ignore_index | ignore_index | 表示忽略的一个标签值。 |
| reduce | - | PyTorch 已弃用, Paddle 无此参数,需要转写。 |
| reduction | reduction | 表示应用于输出结果的计算方式。 |
转写示例
size_average/reduce:对应到 reduction 为 sum
# PyTorch 写法
torch.nn.NLLLoss(weight=w, ignore_index=-100, size_average=False, reduce=True)
torch.nn.NLLLoss(weight=w, ignore_index=-100, size_average=False)
# Paddle 写法
paddle.nn.NLLLoss(weight=w, ignore_index=-100, reduction='sum')
size_average/reduce:对应到 reduction 为 mean
# PyTorch 写法
torch.nn.NLLLoss(weight=w, ignore_index=-100, size_average=True, reduce=True)
torch.nn.NLLLoss(weight=w, ignore_index=-100, reduce=True)
torch.nn.NLLLoss(weight=w, ignore_index=-100, size_average=True)
torch.nn.NLLLoss(weight=w, ignore_index=-100)
# Paddle 写法
paddle.nn.NLLLoss(weight=w, ignore_index=-100, reduction='mean')
size_average/reduce:对应到 reduction 为 none
# PyTorch 写法
torch.nn.NLLLoss(weight=w, ignore_index=-100, size_average=True, reduce=False)
torch.nn.NLLLoss(weight=w, ignore_index=-100, size_average=False, reduce=False)
torch.nn.NLLLoss(weight=w, ignore_index=-100, reduce=False)
# Paddle 写法
paddle.nn.NLLLoss(weight=w, ignore_index=-100, reduction='none')