Data—Createorchangevariables—Createnewvariable 基本命令 Stata有四个基本的生成和修改变量的命令：gen、egen、replace和recode•.gen和egen分别是generate和extendedgenerate的缩写，它们用于生成新变量•.replace和recode用来改变现存变量的属性或数值•.
如果读入excel数 据,则以字符型变量输入日期,并重新格式日期 生成变量的路径 data create or change variables 生成变量的窗口 data create or change variables create new variable 基本命令 stata有四个基本的生成和修改变量的命令:gen、egen、 replace和recode . gen和egen分别是generate和extended generate的缩写,...
得到结果 Contains data from 地区贸易政策不确定性.dta Observations: 744 Variables: 3 4 May 2024 19:38 --- Variable Storage Display Value name type format label Variable label --- prov str9 %9s 省份名称 year int %10.0g 年份 TPU double %10.0g 地区贸易政策不确定性 -...
生成变量的窗口 Data—Createorchangevariables—Createnewvariable 基本命令 Stata有四个基本的生成和修改变量的命令：gen、egen、replace和recode•.gen和egen分别是generate和extendedgenerate的缩写，它们用于生成新变量•.replace和recode用来改变现存变量的属性或数值•.replace需要与gen一起使用；二者的区别在于，gen...
. by id (date), sort: gen firstdate = date[1] To unpack this command line, Stata sorts onidfirst and then withinidondate. Then, for each distinctid, the new variablefirstdateis calculated as the first value, which is the minimum. ...
股票代码[Symbol] 股票简称[ShortName] 年度区间[EndDate] 行业代码[IndustryCode] 行业代码 import excel "D:\Download\上市公司基本信息年度表184122253\STK_LISTEDCOINFOANL.xlsx", sheet("sheet1") firstrow foreach var of varlist * { label variable `var' "`=`var'[1]'" ...
To convert the above date variable to an elapsed date format, you must first convert the numeric variable to a string and then use thedate()function. For example, . tostring datevar, replace format(%20.0f)datevar was long now str8. replace datevar = "0" + datevar if length(datevar)...
Stata has many mathematical,statistical,string,date,time-series,and programming functions.See help functions for the basics,and see the Stata Functions Reference Manual for a complete list and full details of all the built-in functions.You can use menus and dialogs to create new variables and ...
Data — Create or change variables — Create new variable 第5页/共28页 基本命令 Stata有四个基本的生成和修改变量的命令:gen、egen、replace和recode . gen和egen分别是generate和extended generate的缩写,它们用于生成新变量 . replace和recode用来改变现存变量的属性或数值 ...
use the function dow() gen dayofweek= dow(date) Replace “date” with the date variable in your dataset. This will create the variable ‘dayofweek’ where 0 is ‘Sunday’, 1 is ‘Monday’, etc. (type help dow for more details) To specify a range of dates (or integers in general) ...