NameError Traceback (most recent call last) Input In [49], in <cell line: 1>() ----> 1 plot_confusion_matrix(model, X_test, y_test,cmap='Blues') 2 plt.tight_layout() NameError: name 'plot_confusion_matrix' is not defined
时间: 2024-01-11 08:05:51 浏览: 146
这个错误提示说明在当前的作用域中找不到名为 `plot_confusion_matrix` 的函数或类。这通常是因为您没有正确导入所需的库或模块。
在这种情况下,我猜测您可能是想使用 `sklearn.metrics.plot_confusion_matrix` 函数来绘制混淆矩阵。如果是这样,您需要执行以下导入语句:
```python
from sklearn.metrics import plot_confusion_matrix
```
请确保在运行 `plot_confusion_matrix` 函数之前执行此导入语句。
相关问题
在使用plaxis解译器时NameError Traceback (most recent call last) Input In [2], in <cell line: 1>() ----> 1 plx = new_client() NameError: name 'new_client' is not defined
The error message suggests that the function `new_client()` is not defined in the current scope or module.
Most likely, you need to import the module that contains the `new_client()` function before you can use it. You can do this by adding an import statement at the beginning of your code like this:
```python
from plxscripting.easy import EasyModelling
plx = EasyModelling()
```
Alternatively, you might have a typo in the function name or the function might not be defined at all. Make sure that you have spelled the function name correctly and that you have defined the function in your code or imported it from a module.
--------------------------------------------------------------------------- NameError Traceback (most recent call last) <ipython-input-34-a5e78519a686> in <cell line: 7>() 5 loss_fn = nn.CrossEntropyLoss() 6 ----> 7 losses, states = the_loop(net, optimizer, train_loader, epochs=epochs) 8 9 fig = plot_losses(losses) NameError: name 'train_loader' is not defined这个错误怎么改
这个错误提示说 `train_loader` 这个变量没有定义,所以需要先定义 `train_loader` 变量。一般情况下,我们会使用 PyTorch 的 `DataLoader` 对象来加载数据集,所以您需要先定义 `train_loader`,例如:
```python
from torch.utils.data import DataLoader
# 定义数据集
train_dataset = YourDataset(...)
# 定义数据加载器
train_loader = DataLoader(train_dataset, batch_size=batch_size, shuffle=True)
```
这里的 `YourDataset` 是您自己定义的数据集类,`batch_size` 是批次大小,`shuffle` 表示是否打乱数据集顺序。根据您的具体情况,您需要修改 `YourDataset` 类的定义和参数设置。
然后,将上述代码中的 `train_loader` 替换成您定义的数据加载器即可。
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