Stata:条件判断 多条件判断命令inlist、inrange,适用于重污染企业定义等 keep if inlist(state, "AL", "AK", "AZ") *等价于: keep if state=="AL" | state=="AK" | state=="AZ" keep if inrange(distance, 10, 91) *等价于: keep if distance>=10 & distance<=91...
stata中keep命令的用法 在Stata中,keep命令用于保留或删除变量,以便进一步分析数据。使用keep命令可以选择性地保留某些变量,并删除其他变量。其语法如下: keep [varlist] [if] [in] 其中, - varlist表示要保留的变量列表。 - if表示条件语句,用于限定要保留的观测值。 - in表示观测范围,用于限制要保留的观测值...
5.keep if inlist(state, "AL", "AK", "AZ") 与下面这个语句相同: keep if state=="AL" | state=="AK" | state=="AZ" 而 keep if inrange(distance, 10, 91) 与下面这个语句相同: keep if distance>=10 & distance<=91 6.要快速比较两个变量,以查看第一个变量的值高于、低于和等于第二个...
One-sample t testttest varname == # [if] [in] [, level(#)] Two-sample t test using groupsttest varname [if] [in] , by(groupvar) [options1] *11、单因素方差分析oneway response_var factor_var [if] [in] [weight][,options] *12、多因素方差分析/协方差分析anova varname [termlis...
keep if 命令的基本语法是: stata keep if condition 其中condition 是一个逻辑表达式,用于指定哪些观测值应该被保留。如果 condition 为真(即非零且非缺失),则对应的观测值会被保留;否则,该观测值会被删除。 2. keep if 命令的具体示例 假设我们有一个数据集 auto.dta,它包含了汽车的变量,如 price(价格)...
首先，打开 Stata 软件，并加载你的数据集。输入以下命令以查看数据集中可用的变量列表和数据情况：describe 根据变量列表确定表示行业的变量名称。假设行业变量名为 industry。使用 keep if 命令，将只保留 "汽车制造" 行业的观测值。命令如下所示：stata复制代码keep if industry == "汽车制造"请注意，...
stata中并列条件stata中并列条件 在stata中,我们可以使用“&”符号来表示并列条件,即两个或多个条件都必须满足才能执行某个操作或输出某个结果。例如,我们可以使用以下代码来选取满足两个条件(age>30且income>5000)的观测值: ``` use datafile keep if age>30 & income>5000 ```...
stata Share Follow edited Apr 18, 2021 at 8:44 Nick Cox 37k66 gold badges3434 silver badges4949 bronze badges asked Apr 18, 2021 at 2:13 AerialImpact 1744 bronze badges Add a comment 2 Answers Sorted by: 2 The easiest way is keep if inlist(username, "u...
To: statalist@hsphsun2.harvard.edu Sent: Friday, April 03, 2009 12:36 AM Subject: st: using "keep if" Hi, I am trying to use "keep if" to trim down the data that I want to use tolabel some observations on a plot. Using "keep if" in the following command line seems to work...
This is doable in SAS, since there's a command: if in (insert list of zip codes here); Perhaps there's an analogous command in Stata? Thanks in advance for your help. * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/...