for epoch in range(1, num_epochs + 1): train(model, device, train_loader, optimizer, epoch) test_loss, test_acc, pred, target = test(model, device, test_loader) Recall = recall_score(target, pred, average='macro') Precision = precision_score(target, pred, average='macro') F1_score = f1_score(target, pred, average='macro') kappa_score=cohen_kappa_score(target, pred) test_Loss_list.append(test_loss) test_Accuracy_list.append(test_acc) Recall_list.append(Recall) Precision_list.append(Precision) F1_score_list.append(F1_score) kappa_list.append(kappa_score) Loss.append(test_Loss_list) Accuracy.append(test_Accuracy_list) Recall_test.append(Recall_list) Precision_test.append(Precision_list) F1_score_test.append(F1_score_list) kappa_test.append(kappa_list)

这段代码是一个训练模型的循环，它的目的是在每个epoch中执行训练和测试，并记录相关的指标值。在每个epoch中，模型会通过`train`函数进行训练，然后通过`test`函数计算测试集上的损失、准确率、召回率、精确率、F1分数和Kappa分数。这些指标值会被保存到相应的列表中。最后，这些列表会被保存到`Loss`、`Accuracy`、`Recall_test`、`Precision_test`、`F1_score_test`和`kappa_test`中。

请问还有其他问题吗？

相关问题

for epoch in range(num_epochs): model.train() train_loss = 0 train_mae = 0 for batch_data, batch_target in train_dataloader: optimizer.zero_grad() output = model(batch

_data) # 前向传播
loss = loss_fn(output, batch_target) # 计算loss
train_loss += loss.item()
mae = mean_absolute_error(output.detach().cpu().numpy(), batch_target.detach().cpu().numpy()) # 计算MAE
train_mae += mae
loss.backward() # 反向传播
optimizer.step() # 更新梯度
train_loss /= len(train_dataloader)
train_mae /= len(train_dataloader)
model.eval() # 切换到评估模式
eval_loss = 0
eval_mae = 0
with torch.no_grad():
for batch_data, batch_target in eval_dataloader:
output = model(batch_data)
loss = loss_fn(output, batch_target)
eval_loss += loss.item()
mae = mean_absolute_error(output.detach().cpu().numpy(), batch_target.detach().cpu().numpy())
eval_mae += mae
eval_loss /= len(eval_dataloader)
eval_mae /= len(eval_dataloader)
print(f"Epoch {epoch+1}/{num_epochs}, Train Loss: {train_loss:.4f}, Train MAE: {train_mae:.4f}, Eval Loss: {eval_loss:.4f}, Eval MAE: {eval_mae:.4f}")
if eval_loss < best_eval_loss:
best_eval_loss = eval_loss
torch.save(model.state_dict(), save_path)
print("Save model successfully!")

def train_and_evaluate(model: torch.nn.Module, optimizer: torch.optim.Optimizer, train_loader: DataLoader, valid_loader: DataLoader, num_epochs: int, device: str): """训练和评估函数""" best_valid_loss = float("inf") for epoch in range(num_epochs): train_loss = train(model, optimizer, train_loader, device) valid_loss = evaluate(model, valid_loader, device) print(f"Epoch [{epoch + 1}/{num_epochs}], Train Loss: {train_loss:.4f}, Valid Loss: {valid_loss:.4f}") if valid_loss < best_valid_loss: best_valid_loss = valid_loss torch.save(model.state_dict(), "best_model.pt") model.load_state_dict(torch.load("best_model.pt")) test_loss = evaluate(model, test_loader, device) print(f"Test Loss: {test_loss:.4f}")

这段代码是一个训练和评估模型的函数。它包含了以下参数：

- `model`: 要训练的PyTorch模型。
- `optimizer`: 优化器，用于更新模型参数。
- `train_loader`: 训练数据的DataLoader。
- `valid_loader`: 验证数据的DataLoader。
- `num_epochs`: 训练的总轮数。
- `device`: 训练使用的设备（GPU或CPU）。

在训练过程中，函数会迭代每个epoch，并在每个epoch完成后打印训练和验证损失。如果当前的验证损失比之前最佳的验证损失更小，就会保存当前模型的状态。最后，它会使用保存的最佳模型状态来计算测试集上的损失。