【count】:number of rows 【count if missing() 】:设置条件 【isid()】:check if an variable uniquely id entifies the data.检查变量是否唯一标识数据,相当于判断主属性。 【unique】先安装,指令【ssc install unique】 重复值数据量(所有数据量)和唯一值(不重复的数据)数据量。 【codebook】:适合初次接触...
Subject st: A modest proposal - missing data doesn't count Date Mon, 14 Jun 2010 17:52:26 +0100Feeling aggrieved at years of typing expressions like "if x>10 & x<.", and feeling sure there must be lots of wrong results from Stata because users didn't notice that "x>10" includes...
st0001, multiple imputation, missing data, model specification, bootstrapStata’s mi commands provide powerful tools to conduct multiple imputation in the presence of ignorable missing data. In this article, I present Stata code to extend the capabilities of the mi commands to address two areas ...
numbers to, spells of non-missing values. When his -x- is missing, Nikolaos wants the counter to be missing; when it is non-missing, he wants the counter to go 1, 2, 3, ... . The principles of identifying spells will be discussed in Stata Journal 7(2), out in about 5 weeks' ...
在Stata中,可以使用generate命令来声明一个字符串(string)变量。声明字符串变量的语法如下: 代码语言:txt 复制 generate 变量名 = "字符串值" 其中,变量名是你想要给字符串变量起的名称,字符串值是你想要赋给该变量的字符串。 需要注意的是,Stata中的字符串变量必须用双引号括起来。如果字符串中包含双引号,可以...
showIndexFieldsIf this method returns true, it will look for the first enabled index when you are adding query range fields to the dialog and if a data source does not have any ranges specified. It will also show the visible fields from that index. (Inherited fromRunBase.) ...
Data gaps Notable data gaps emerged through the indicator selection process. Several gaps cut across multiple themes such as the true cost of food, a cost that includes the externalities currently unaccounted for in the market price such as diet-related disease, pollution and natural resource degrad...
All analyses were conducted using STATA version 14.1 (StataCorp). Results Systematic review and summary statistics Using PubMed/MEDLINE and Embase searches, we identified 2936 new publications meeting our criteria for abstract screening (Fig. 1). Of these, 151 duplicate records were removed and 1917...
, and feeling sure there must be lots of wrong results from Stata because users didn't notice that "x>10" includes cases with the missing value, might I request a new code function? The name value() is available. While users would have to remember to use it, it would quickly become ...
To "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> Subject Re: st: RE: A modest proposal - missing data doesn't count Date Tue, 15 Jun 2010 12:59:08 -0400I am in principle supportive of this new -value- expression. I get bit periodically and the various workaroun...