原因：特征为factor的列有空值。
查看空值列：
| levels(train$Embarked) |
解决方法：
修改空值列为“missing”
| levels(train$Embarked)[1] = "missing" |
参考：
c50 code called exit with value 1
最新推荐文章于 2021-05-18 12:42:48 发布
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| levels(train$Embarked) |
| levels(train$Embarked)[1] = "missing" |
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