egen 命令应用系列——1.合并两个变量concat()函数

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egen是Stata中非常实用的一个命令，由于包含大量可以连用的函数，功能非常强大。这里做一个总结，把曾经使用过的功能进行一个记录。

help 原文如下

concat(varlist) [, format(%fmt) decode maxlength(#) punct(pchars)]
may not be combined with by. It concatenates varlist to produce a string variable. Values of string
variables are unchanged. Values of numeric variables are converted to string, as is, or are converted
using a numeric format under the format(%fmt) option or decoded under the decode option, in which case
maxlength() may also be used to control the maximum label length used. By default, variables are added
end to end: punct(pchars) may be used to specify punctuation, such as a space, punct(" "), or a comma,
punct(,).

应用示例

clearinp str5 var1 var2ASDS  2.334SDDF  0.434WESF  43.45WSFS  3.455endegen var3=concat(var1 var2) //help egen  ；concat合并变量的命令

代码执行后的效果

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