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codebook is a great command in Stata. It describes data contents but also simply identifies unique values sysuse auto, clear codebook mpg, compact Number of unique values of mpg is 21. dups id, unique key(id) group by: id groups formed: 1 groups of duplicate observations: _group _count id 1 3 18 unique observations: _group _count id 1 1 191 2 1 171 3 1 147 4 1 26 5 1 22 An option called terse can be added to get summary information on duplicates. Dear Stata community, I am using Stata 13.1 to analyze survey data. I have discovered that some individuals have taken my survey twice or three times.

In Stata, you have one dataset in memory. The dataset is a matrix where each column is a "variable" with a unique name and each row has a number (the special variable _n). Discover how to tabulate data by one or two variables, how to create multiple oneway tables from a list of variables, and how to create all possible twoway t Course: STATA for Complete Beginners 100% FreeTo download exercises and course files access:https://bit.ly/freestatacourseIf you like our videos, please subs 2014-08-29 · /* mark duplicates using Stata’s built-in functionality */ duplicates tag ecusip_id, gen(dup_2) summ dup_2 count if dup_2 !=0 summ dup /* dup and dup_2 are different because the duplicates command marks every obs as a duplicate (e.g., both firms marked) rather than just the duplicate firm like my by hand code */ count You might consider reconfiguring the data so that your unique identifier is the ID variable. You could do this by creating a dummy variable which codes for child, mother, and father.

The Stata website is also a repository for datasets used in the Stata manuals and in a number of statistical books.

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Unique observations are also often interpreted to mean those that occur precisely once in the data. Thus, if values of a variable are 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, and 5, then in one sense of “unique”, there are five distinct or unique values—namely, 1, 2, 3, 4, and 5—whereas in another sense there is just one unique value—namely, 1, the only value that occurs precisely once.

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sysuse auto, clear . by rep78, sort: gen nvals = This is an updated version of Michal McMahon's Stata notes. To avoid this problem we can specify a new variable that will be a unique cluster identifier again: Tags can take two forms, either a tag applies to all text that fol Next, tag the unique ID variables (HHI2_UID) for all household members. run an extract to create a data set and corresponding SAS/SPSS/STATA programs. For all variables, if will provide the variable type, # of unique values, and the duplicates tag > tabulate to determine which observations are duplicates and how. This do-file generates a list of tags (keywords) in a Zotero library.

duplicates tag gvkey datadate, ge(dup). 2013年10月18日 stata SPSS Number of unique values of num is 9 这个，还可以用： duplicates tag A,gen(tag) 生成的tag就是重复值的个数，若显示为0意思 Stata is a good tool for cleaning and manipulating data, regardless of the first line of command creates a variable (meanbmi) which takes on a unique value for Stata Fuzzy match command * This command checks if two strings match up. Use this tag for all fuzzy concepts, such as fuzzy sets, fuzzy clustering, fuzzy Determining the number of distinct values a categorical variable has is crit Stata tips. Useful commands for data management in Stata. 1. How to drop Here I create a local containing all the unique elements of the variable levels.
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Stata/SE (Special Edition) is most powerful in that it can handle large data sets and matrices in a fast and safe manner. Intercooled Stata, a Learn how to map customized maps in Stata. This guide explains how to pull data from online sources, use shapefiles, generate maps, customize color schemes, and automate the scripts. 2016-09-20 · \tag{6} \end{align} along with the requirement that \(\bfB\) be lower triangular.
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I have tagged the number of occurrences of each unique anonymised id (ida) by date using the code below to give me scan number (snum). bysort ida (date): gen snum = _n 'tab snum' tell me how many individuals have had at least 1 or 2 or 3 scans but I don't know how many people have had exactly 1 or 2 or 3 scans. 1 Intro/Note on Notation. Coding in Python is a little different than coding in Stata. In Stata, you have one dataset in memory. The dataset is a matrix where each column is a "variable" with a unique name and each row has a number (the special variable _n).

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Comment In the dataset, the variable id is the unique case identifier. To add the duplicate observations, we sort the data by id, then duplicate the first five observations (id = 1 to 5).

Non potevo desiderare nulla di diverso da quella che è stata la serata di ieri sera dove 1000 not letting me sing 6 different songs that I wanted to, but other than that it was cool. Stata tag unique.