STATA变量中心化和标准化

定义

1. X标准化：
2. X中心化：

命令 center

安装

center为外部命令，需要事先安装。
ssc install center

语法

center varlist [,inplace { prefix(prefix) | generate(newvar) } standardize ]

解释：

centers (or, optionally, standardizes) the variables in varlist. For each varname in varlist, a new variable c_varname is created containing the centered (or standardized) values of that variable.