17 Oct 2017 Hemos creado un pequeño programa Stata llamado mdesc que cuenta el Usamos el comando duplicates tag para crear una nueva variable

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). This leads to 195 unique and 5 duplicated observations in the dataset.

Academic writing software. Combine text, graphs & statistical analysis Example: I usually export regression tables from Stata in file format .tex, and 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. The variable hhid has 60 unique values and if I understand the data correctly, this means there are 100 observations from 60 households. Last edited by Friedrich Huebler ; 12 Sep 2017, 19:39 . Comment In the dataset, the variable id is the unique case identifier.

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.

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.

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.

by A B C: gen dup_id = id[1] For basic technique with by: see (e.g.) this discussion distinct is a user-written program from the Stata Journal, as you are asked to explain (FAQ Advice #12). search distinct in Stata brings up clickable links.

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In conclusion, I want to calculate the industry market capitalization based on individual firms' unique observations in a given month that belong to this particular industry.

for more information about using search). Se hela listan på ssc.wisc.edu Se hela listan på wlm.userweb.mwn.de Se hela listan på gtools.readthedocs.io 2020-12-02 · A guide to using Stata for data work.
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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.

1.2 STATA Basics STATA is available in a variety of platforms and flavors. STATA runs under UNIX, LINUX, Microsoft Windows and Apple Macintosh OS. 1.2.1 Three Flavors Stata has three different flavors. Stata/SE (Special Edition) is most powerful in that it can handle large data sets and matrices in a fast and safe manner.
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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

Indeed, as we shall see, such usage is also to be found in oﬃcial Stata. Thus, in the example just given, 1, 2, 3, and 4 would be reported by many as the unique values of the variable in question, even though such distinct values could all be repeated in the data—and, in particular, 2, 3, and 4 are indeed repeated.

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Your code has a number of additional insights (for me) in it over and above answering the questions. Best, Ben Ben Hoen LBNL Office: 845-758-1896 Cell: 718-812-7589 -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox Sent: Friday, January 06, 2012 10:47 AM To: statalist@hsphsun2.harvard returns integers from 1 up according to the distinct groups of varlist in sorted order. The integers are labeled with the values of varlist or the value labels, if they exist.

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

Looking at the help of the command, it does not seem possible to store this value. Starting with Stata 8, the duplicates command provides a way to report on, give examples of, list, browse, tag, or drop duplicate observations. This FAQ is likely only of interest to users of previous versions of Stata. Case 1: Identifying duplicates based on a subset of variables. You wish to create a new variable named dup Se hela listan på stata.com 2013-09-05 · Building a unique ID in Stata using -concat-September 5, 2013 15 September, 2014. by odden.2@osu.edu at 8:29pm 15 September, Tony Brady, 1998. "UNIQUE: Stata module to report number of unique values in variable(s)," Statistical Software Components S354201, Boston College Department of Economics, revised 18 Jun 2020.

The list subcommand lists the duplicate observations: . duplicates list x1 x2 x3 So, if I have, e.g. 100 unique IDs, but for each ID it gets repeated multiple times (as shown above) and I want to figure out how many of my unique IDs satisfy some criterion (e.g.