gru加注意力机制进行时间序列预测pytorch代码
时间: 2023-05-19 13:04:56 浏览: 182
以下是使用 PyTorch 实现 Gated Recurrent Unit (GRU) 和注意力机制进行时间序列预测的示例代码:
```python
import torch
import torch.nn as nn
class GRUAttention(nn.Module):
def __init__(self, input_size, hidden_size, output_size):
super(GRUAttention, self).__init__()
self.hidden_size = hidden_size
self.gru = nn.GRU(input_size, hidden_size)
self.attention = nn.Linear(hidden_size, 1)
self.out = nn.Linear(hidden_size, output_size)
def forward(self, input):
batch_size = input.size(0)
hidden = self.init_hidden(batch_size)
output, hidden = self.gru(input, hidden)
attention_weights = torch.softmax(self.attention(output), dim=1)
context_vector = torch.bmm(output.transpose(1, 2), attention_weights).squeeze(2)
output = self.out(context_vector)
return output
def init_hidden(self, batch_size):
return torch.zeros(1, batch_size, self.hidden_size)
# 示例使用
model = GRUAttention(input_size=10, hidden_size=20, output_size=1)
input = torch.randn(32, 5, 10) # batch_size=32, sequence_length=5, input_size=10
output = model(input)
print(output.shape) # torch.Size([32, 1])
```
请注意,这只是一个示例代码,您需要根据您的数据和任务进行适当的修改和调整。
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