# Page Not Found

The URL `9-1` does not exist.

You might be looking for one of these pages:
- [第九章：逻辑回归](https://windmising.gitbook.io/liu-yu-bo-play-with-machine-learning/src/chapter9/9-1.md)
- [9-2 逻辑回归的损失函数](https://windmising.gitbook.io/liu-yu-bo-play-with-machine-learning/src/chapter9-1/9-2.md)
- [第六章：梯度下降法](https://windmising.gitbook.io/liu-yu-bo-play-with-machine-learning/src/chapter6/6-1.md)
- [第八章：多项式回归与模型泛化](https://windmising.gitbook.io/liu-yu-bo-play-with-machine-learning/src/chapter8/8-1.md)
- [4-1](https://windmising.gitbook.io/liu-yu-bo-play-with-machine-learning/src/chapter4-1/4-1.md)

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2. **View the full content**: [/llms-full.txt](https://windmising.gitbook.io/liu-yu-bo-play-with-machine-learning/llms-full.txt) - Full content export

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