Permutation Importances
时间: 2024-05-17 18:16:16 浏览: 126
Permutation Importance是一种变量筛选的方法,它有效地解决了变量重要性评估的两个问题。通过对每个变量进行排列并计算模型性能的变化,Permutation Importance可以衡量每个变量对模型性能的贡献程度。
标准化后的Permutation Importance可以考虑到随机性。具体而言,它是通过计算Permutation Importance与随机100次的结果的标准差来得到的。如果在Permutation Importance相对稳定的情况下,标准差较小,那么可以认为该变量的重要性结果更加稳定可靠。
关于Permutation Importances的更详细信息,您可以参考链接。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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- *1* *3* [特征筛选还在用XGB的Feature Importance?试试Permutation Importance](https://blog.csdn.net/weixin_38037405/article/details/127131599)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
- *2* [PermutationImportance](https://blog.csdn.net/sinat_23971513/article/details/114901643)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
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