以下是Coursera上的How to Win a Data Science Competition: Learn from Top Kagglers课程笔记. Statistics and distance based features 该部分专注于此高级特征工程:计算由另一个分组的一个特征的各种统计数据和从给定点的邻域分析得到的特征. groupby and nearest neighbor methods 例子:这里有一些CTR任务的数据 我们可以暗示广告有 页面上的最低价格将吸引大部分注…
Mean encodings 以下是Coursera上的How to Win a Data Science Competition: Learn from Top Kagglers课程笔记. 学习目标 Regularize mean encodings Extend mean encodings Summarize the concept of mean encodings Concept of mean encoding 均值编码是一种非常强大的技术,它有很多名字,例如:likelihood…
第7章 高级概念 The Code First modeling functionality that you have seen so far should be enough to get you up and running with most applications. However, Code First also includes some more advanced functionality that you may require as your needs advance.…
写在前面:案例.常用.归类.解释说明.(By Jim)使用if-then语句如果命令的退出状态是0(成功执行命令),将执行then后面的所有命令.如果命令的退出状态是0以外的其他值,那么then后面的命令将不会执行,bash shell会移动到脚本的下一条命令. #!/bin/bash # testing the if statement if date then echo "it worked" fi (date返回0,执行then语句it worked) #!/bin/bash #…