利用tostring命令将数值型变量转化为文本格式。示例：将date变量从数值型转换为文本型，命令为tostring date, replace。文本型转数字文字对应表：通过encode命令生成新变量，将文本数据转化为可运算的虚拟变量形式。示例：创建新变量stkcd1，将stkcd变量从文本型转换为数字文字对应表，命令为encode stkcd, ge
1、Quarterly date from daily date 导入数据,查看数据 usedate.dtadesced 可以发现Date2 is a string date variable 然后进行转换 gen datevar=date(date2,"MDY", 2099)format datevar %tdgen quarterly = qofd(datevar)format quarterly %tq 2、Quarterly date from monthly date gen month = month(datevar...
How can I turn a string variable containing dates into a date variable Stata can recognize? How can I extract a portion of a string variable using regular expressions? Error messages How can I handle the matsize too small error? How can I handle the No Room to Add Observations error? How...
dropifString=="1"//字符型dropifNumber==1//数值型/* 字符型数据要加上引号 */**2.运算 gen Add=String+Number/* type mismatch r(109); */gen Number_2=Number gen Add=Number+Number_2//数值运算gen String_2=String gen Add_Str=String+String_2// 字符拼接 总结成两句话:字符型的要带引号;...
Stata日期和时间处理指南说明书 in Stata Gabriela Ortiz Applied Econometrician StataCorp LLC 1
请看看Stata对encode的说明:encode creates a new variable named newvar based on the string variable varname, creating, adding to, or just using (as necessary) the value label newvar or, if specified, name. Do not use encode if varname contains numbers that merely happen to be stored as ...
String functions help string functions 1. 实例:股利分配数据(第一列为发布时间,第二列为数额),需要将时间变量切割为年月日。 实现思路:使用tostring命令将数字转化为文字,再进行切割。 use tostring2.dta, clear tostring date_pub,gen(date1) // 数字--》文字 ...
Date and time functions Complete suite of functions for manipulating dates and datetimes, including support for business calendars and leap seconds Convert dates and datetimes in string form to numeric form with great flexibility, including support for any order of year, month, day, hour, minute...
[D]Data types Quick reference for data types [D]Missing values Quick reference for missing values [D]Datetime Date and time values and variables [D]list List values of variables [D]edit Browse or edit data with Data Editor [D]varmanage Manage variable labels,formats,and other properties [D...
gen year = substr(enddate,1,4) //strpos(s1, s2)返回字符s2在s1中的位置,如果s1中找不到s2,则返回0,将该判断再赋给y gen y = strpos(s1, s2) != 0 1. 2. 3. 4. 5. 4. 输出结果 (1)常规输出 outreg2 using "E:\mfg\outreg\r2", word append addtext(CountryFE, YES,YearFE, YES)...