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刚开始用Pandas，想做一个ID3的决策树，首先需要把表中的非量化值以数字形式展示，表如下：
想把“预习程度”字段用-1,0,1来表示一般、好和差，学习分数也是一样，是否完成项目用0和1表示，怎样完成替换，一般是怎么做的，另外是否需要替换？本人新手，还望多指教。。
ringa_lee
There are n ways to solve it directly in Excel.Press ctrl+H and replace directly.You can also use filter~
Usereplace函数frame.replace(('好','一般','差'),(1,0,-1))
replace
frame.replace(('好','一般','差'),(1,0,-1))
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
There are n ways to solve it directly in Excel.
Press ctrl+H and replace directly.
You can also use filter~
Use
replace函数frame.replace(('好','一般','差'),(1,0,-1))