local sub "world" if regexm("`str'", "`sub'") { display "The string contains the substring." } else { display "The string does not contain the substring." } 使用strpos函数: strpos函数返回子字符串在目标字符串中的起始位置(如果
keys(varname):stubnames 的子集变量名 (等价于 j()) (不存在); string:是否允许将观测值为字符型的 key 与 stub 进行匹配 (见示例); match(str):和 @ 的用法一致 (默认通过占位符 @ 的使用来限定数值在变量名中的位置); dropmiss:删除通过横纵变换后变量的缺失值; nodupcheck:允许重复值存在。 optio...
med4way depavr varlist [if] [in], a0(real) a1(real) m(real) yreg(string) mreg(string) depvar表示被解释变量; varlist:依次为暴露因素、中介变量 、多个混杂因素(可有可无,视情况而定) 未完待续!
If the string contains spaces, you must enclose it in quotes wherever it is used. Intro 2 — A tour of concepts and commands 12 So to be more truthful, the collection looks more like === Collection === value tags --- --- 78.15 sex[1] region[1] result[mean] 78.25 sex[1] region...
问在Stata文件列表中重命名和创建变量EN关于文件列表的管理：filelist(SSC)非常好；另一种方法请参见fs(...
[if exp]:仅当某值为真时应用函数 [in range]:应用于特定行 [weight]:应用权重 [using filename]:从文件中提取数据(如果未加载) [,options]:命令的特殊选项 例子(这里也只是用到了其中的一些元素): sysuse auto, clear bys rep78 : su price if foreign == 0 & price <= 9000, d 其含义是,以变量...
年底foreachiin供应商客户{use`i'_合并, clearkeepifq==4dropqssave`i'_合并_年, replacesutayr} 得到结果 Contains data from 供应商_合并.dta Observations: 178,033 Variables: 8 31 Mar 2023 13:37 --- Variable Storage Display Value name type format label Variable label ---...
either if "yes" == "yes" { or if "no" == "yes" { 10 [ U ] 18 Programming Stata either of which is the desired result. Had we omitted the double quotes, the line would have read if no == "yes" { (assuming 'answ' contains no), and that is not at all the desired ...
if tag == 1 drop tag keep x h_* drop if missing(x) reshape long h_, i(x) j(type) string bysort x (type) : gen cumul_sum_ = sum(h_) if !missing(h_) drop h_* reshape wide cumul_sum_, i(x) j(type) string * Plotting ds cumul* local wcount: word count `r(varlist)...
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 ...