深度学习框架是pytorch,需要实现两种不同的一维数据的输入,提取特征后,将两种特种融合,再进行分类,并附上训练的代码
时间: 2024-03-26 07:38:26 浏览: 12
好的,以下是一个基于 PyTorch 的示例代码,实现了两种不同的一维数据的输入,提取特征后,将两种特征融合,再进行分类:
```python
import torch
import torch.nn as nn
import torch.optim as optim
# 定义特征提取器
class FeatureExtractor(nn.Module):
def __init__(self):
super(FeatureExtractor, self).__init__()
self.conv1 = nn.Conv1d(in_channels=1, out_channels=16, kernel_size=3)
self.conv2 = nn.Conv1d(in_channels=16, out_channels=32, kernel_size=3)
self.pool = nn.MaxPool1d(kernel_size=2, stride=2)
self.relu = nn.ReLU()
def forward(self, x):
x = self.relu(self.conv1(x))
x = self.pool(x)
x = self.relu(self.conv2(x))
x = self.pool(x)
return x
# 定义分类器
class Classifier(nn.Module):
def __init__(self):
super(Classifier, self).__init__()
self.fc1 = nn.Linear(in_features=32*24, out_features=128)
self.fc2 = nn.Linear(in_features=128, out_features=2)
def forward(self, x):
x = x.view(-1, 32*24)
x = nn.functional.relu(self.fc1(x))
x = self.fc2(x)
return x
# 定义整个模型结构
class Model(nn.Module):
def __init__(self):
super(Model, self).__init__()
self.feature_extractor1 = FeatureExtractor()
self.feature_extractor2 = FeatureExtractor()
self.classifier = Classifier()
def forward(self, x1, x2):
feature1 = self.feature_extractor1(x1)
feature2 = self.feature_extractor2(x2)
feature = torch.cat((feature1, feature2), dim=1)
output = self.classifier(feature)
return output
# 定义数据处理流程
def data_processing():
# 加载数据
x1 = torch.randn(100, 1, 50) # 第一种数据,大小为 (100, 1, 50)
x2 = torch.randn(100, 1, 50) # 第二种数据,大小为 (100, 1, 50)
y = torch.randint(low=0, high=2, size=(100,)) # 标签,大小为 (100,)
# 划分训练集和测试集
train_x1, test_x1 = x1[:80], x1[80:]
train_x2, test_x2 = x2[:80], x2[80:]
train_y, test_y = y[:80], y[80:]
# 转换为 Tensor 并返回
train_x1 = torch.Tensor(train_x1)
train_x2 = torch.Tensor(train_x2)
train_y = torch.LongTensor(train_y)
test_x1 = torch.Tensor(test_x1)
test_x2 = torch.Tensor(test_x2)
test_y = torch.LongTensor(test_y)
return train_x1, train_x2, train_y, test_x1, test_x2, test_y
# 训练模型
def train_model():
# 加载数据
train_x1, train_x2, train_y, test_x1, test_x2, test_y = data_processing()
# 定义模型、损失函数和优化器
model = Model()
criterion = nn.CrossEntropyLoss()
optimizer = optim.Adam(model.parameters(), lr=0.01)
# 训练模型
for epoch in range(100):
optimizer.zero_grad()
output = model(train_x1, train_x2)
loss = criterion(output, train_y)
loss.backward()
optimizer.step()
# 每隔 10 个 epoch 打印一次测试集上的准确率
if epoch % 10 == 9:
with torch.no_grad():
test_output = model(test_x1, test_x2)
pred_y = torch.max(test_output, 1)[1]
accuracy = torch.sum(pred_y == test_y).item() / test_y.size(0)
print('Epoch {}, Test Accuracy {:.4f}'.format(epoch+1, accuracy))
if __name__ == '__main__':
train_model()
```
这个示例代码中,首先定义了一个特征提取器 `FeatureExtractor` 和一个分类器 `Classifier`,然后定义了一个整体模型 `Model`,其中包含两个特征提取器和一个分类器。在 `Model` 的 `forward` 方法中,将输入的两种数据分别提取特征,然后使用 `torch.cat` 将两种特征拼接起来,最后送入分类器进行分类。
接着定义了一个 `data_processing` 函数,用于加载并划分数据集。最后在 `train_model` 函数中,定义了模型、损失函数和优化器,并进行模型训练。每隔 10 个 epoch 打印一次测试集上的准确率。