input str10 String Number"1"1"2"2"3"3"4"4end*导致问题**1.条件筛选 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...
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 s...
string to_string (int val); string to_string (long val); string to_string (long long val); string to_string (unsigned val); string to_string (unsigned long val); string to_string (unsigned long long val); string to_string (float val); string to_string (double val); string to_str...
writefloat%9.0g writing score mathfloat%9.0g math score sciencefloat%9.0g science score socstfloat%9.0g social studies score honorsfloat%19.0g honlab honors english awardsfloat%9.0g cid int %8.0g --- Sorted by: .setmore off 进行操作为: sgmediation science, mv(read) iv(math) 结果为: . ...
T strToNum(conststring& str)//字符串转换为数值函数 { stringstream ss(str); T temp; ss >> temp; if( ss.fail() ) { stringexcep ="Unable to format "; excep += str; throw(excep); } returntemp; } intmain() { try{ stringtoBeFormat ="7"; ...
通过查阅帮助文档[3](也可在 Stata 中使用 help datatpye 命令查看),可得,byte 占用 1 个字节,float 占用 4 个字节,int 占用 2个字节,str18 占用 18个字节,简单计算得到 auto.dta 一个观测的 width 是 43 字节。 str18中的18,表示 变量 make 中,占用内存最多的值所占用的内存为18字节。
EN1. Flutter中的日期转换 // 初始化当前日期 DateTime _nowDate = DateTime.now(); // 获取当前...
Data management: How do I split a string variable into parts? (Updated 29 August 2005) Data management: Is there a way to tell Stata to try all values of a particular variable in a foreach statement without specifying them? (Updated 25 August 2005) Statistics: How large should the ...
Allow the users to download packages that include more than one program file Encourage Stata programmers to comment their programs and share their knowledge within their Stata packages This archive receives monthly update at the end of each month, based onthe latest updates on SSC server. If your...
例如,后者从具有大内存占用的 linked frames 帧中复制变量,尤其是对于 double 和 string 等的数据类型。相比之下,别名变量只是内存中的引用,具有较小的固定内存占用。因此,使用别名变量可以节省内存,并有助于将所有 frame 保存在内存中,从而使 Stata 保持快速灵活。