NameError: name 'matplotlib' is not defined
时间: 2023-09-16 18:13:59 浏览: 68
This error message usually occurs when the `matplotlib` library has not been imported or installed properly. To solve this issue, you can try the following steps:
1. Make sure you have installed `matplotlib` library in your Python environment. You can install it using the following command:
```
pip install matplotlib
```
2. Import `matplotlib` library in your code before using it. You can import it using the following line of code:
```
import matplotlib.pyplot as plt
```
This will import the necessary `pyplot` module from the `matplotlib` library and alias it as `plt`.
3. Make sure you are using the correct spelling and capitalization when referencing `matplotlib` in your code. The error message `NameError: name 'matplotlib' is not defined` suggests that the name `matplotlib` is not recognized in your code, so check that you are not misspelling it or using incorrect capitalization.
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