Stata 中, gen 和 egen 是最常用的变量生成的命令,与之对应,replace 和 ereplace 则是最常用的取值替换的命令是。其中,gen 和 replace 的用法比较简单,ereplace 的多数用法与 egen 相同,这里主要介绍 egen …
除了将数据集中的多个数值替换为0外,我们还可以使用replace命令将数据集中的数值替换为其他数值,比如将特定数值替换为缺失值(missing value)。我们可以使用以下代码将score变量中的1、2、3替换为缺失值: 使用Stata的replace命令可以方便地将数据集中的多个特定数值替换为0或其他数值,实现数据的清洗和整理。通过灵活运用...
I have a variable that is nonmissing and i would like to replace it with a missing value if my other variable has a missing value somwhere during the last 30 days. Can anyone help me? Kind regards André * * For searches and help try: * http://www.stata.com/help.cgi?search * ...
if y > 0.8 // 20% missing drop y gen notmissing = _n if !missing(x) egen r1 = min(notmissing) gen r2 = x[r1] gen x2 = x replace x2 = r2 if missing(x) drop notmissing r1 r2 browse > Dear all, > > I want to replace a variable's missing value with its first non...
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Stata's heckman command is a good example of this. In such cases, there will be observations where missing values are allowed and other observations where they are not—where their presence should cause the observation to be eliminated. If you specify missing, it is your responsibility to ...
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Re: st: if vx==1 (replace v1=1 if v1 is missing, otherwise replace v2=1 ... : how do i do this? From: Nick Cox <njcoxstata@gmail.com> Prev by Date: Re: st: svy subpop option and e(sample) Next by Date: Re: st: svy subpop option and e(sample) Previous by thread...
To "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> Subject re: st: How can I replace missing values with the variable's first nonmissing value? Date Sat, 11 Aug 2012 15:04:09 -0500. > A similar way to do it: > > gen obs = _n > su obs if !missing(x),...