replace***usedata_submit,cleargenergy_int=exp(lenergy_int)collapse(mean)energy_int,by(yearcityid)keepifyear==1998rencityid市代码merge1:m市代码usingchinacity40_db.dtaren市代码cityid***ggroup=substr(string(cityid),1,2)bysgroup:egenmean=mean(energy_int)replaceenergy_int=meanifmissing(energy...
_N: contains the total number of observations in the dataset or the number of observations in the current {\tt by()} group. _pi: contains the value of pi to machine precision. 4.3. 排序(sort) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 sort varlist[in][,stable] sort arranges ...
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3、a 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,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ge...
How can I create dyad IDs? How can I generate automated filenames in Stata? How can I merge multiple files in Stata? How can I combine a large number of files? Missing values Can I quickly see how many missing values a variable has? How can I see the number of missing values and ...
TitleCreating group identifiers AuthorNicholas J. Cox, Durham University, UK William Gould, StataCorp Case 1. I want to create variable id containing 1, 2, 3, ... Type . gen id = _n _nis the Stata way of referring to the observation number. ...
• Graph colors by variable • Create, load, and save sets of frames • Boost-based regular expressions • Vectorized numerical integration, and • New reporting features in putdocx, putexcel, and putpdf 1. Bayesian model averaging (BMA) ...
*Create a dummy variable to identify the group exposed to the treatment. In this example lets assumed that countries with code 5,6, and 7 were treated (=1). Countries 1-4 were not treated (=0). If you already have this skip this step生成地区的虚拟变量 ...
gen gx=group(n)(将经过排序的变量x分为尽量等规模的n个组) egen zx1=std(x1)(得出x1的标准值,就是用(x1-avgx1)/sdx1) egen zx1=std(x1),m(0) s(1)(得出x1的标准分,标准分的平均值为0,标准差为1) egen sdx1=sd(x1)(得出x1的标准差) ...
arrowplotModule to produce combined plot for graphing inter-group and intra-group trends asciiModule to display the ASCII character set asciiplot asl_norm assertky autofmt autolog autorenameModule to automatically rename variables avarmodule to perform asymptotic covariance estimation for iid and non-ii...