name 'precision_recall_curve' is not defined怎么办
时间: 2023-09-23 17:02:39 浏览: 133
这个错误通常是因为你没有正确导入 `precision_recall_curve` 函数。你需要检查代码中是否包含以下导入语句:
```python
from sklearn.metrics import precision_recall_curve
```
如果没有,你需要添加上述语句。如果已经导入了该函数,那么可能是因为你的环境中没有安装 `scikit-learn` 库,你需要使用以下命令安装:
```
pip install -U scikit-learn
```
如果你正在使用 Anaconda,你也可以使用以下命令安装:
```
conda install scikit-learn
```
安装完成后,重新运行程序即可。
相关问题
name '_precision_recall_curve' is not defined
This error message indicates that the code is trying to call a function or variable named `_precision_recall_curve`, but it is not defined in the current scope.
There are a few possible reasons for this error:
1. The function or variable was not imported properly: Make sure that you have imported all the necessary modules and functions, and that they are spelled correctly.
2. The function or variable was defined in a different module or file: If the function or variable was defined in another module or file, make sure that you have imported it correctly and that it is in the correct scope.
3. There is a typo in the code: Check the spelling of the function or variable to make sure that it is correct.
To fix this error, you should check your code and make sure that the function or variable is defined and imported correctly. If you are still having trouble, you can try searching for the function or variable in the documentation or online to see if there are any examples or explanations that can help.
plot_precision_recall_curve不可用怎么办
如果plot_precision_recall_curve不可用,有以下几种可能的解决方案:
1. 检查sklearn版本:plot_precision_recall_curve是Scikit-learn 0.22版本及以上的函数,如果使用的是低版本的Scikit-learn,则该函数可能不可用。可以通过升级Scikit-learn来解决这个问题。
2. 导入正确的模块:确保正确地导入了plot_precision_recall_curve函数所在的模块。该函数位于sklearn.metrics模块中,因此需要使用以下导入语句:
from sklearn.metrics import plot_precision_recall_curve
3. 检查参数:确保正确地传递了所需的参数。例如,需要传递分类器对象和测试数据集。
4. 安装必要的依赖项:plot_precision_recall_curve函数需要matplotlib库的支持。如果该库未安装,则需要安装它。可以使用以下命令来安装matplotlib:
pip install matplotlib
如果上述解决方案不起作用,可以考虑查看Scikit-learn的文档或在Stack Overflow等社区中寻求帮助。