Duplicates Stata Cond. Cox of the Department of Geography at Durham University, UK

Cox of the Department of Geography at Durham University, UK, and coeditor of the Stata Journal, who in turn thanks Thomas Steichen of RJRT for ideas To detect duplicate observations in Stata, one can use the “duplicates” command. This command allows the user to identify duplicate Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist. In Stata terms, duplicates are observations with identical Hi all, I have a table which has duplicates in the column CompanyYear. Using cond () In Stata, we find duplicates using the following commands: duplicates report variable_names [separated by space] duplicates I wrote the following script to remove any duplicates (same ID) greater than 1 and MH codes 0 and 3. duplicates was written by Nicholas J. Get assistance on reporting, tagging, and dropping duplicate observations. We use duplicates tag, duplicates report and duplicates drop commands. I think you're misreading how cond () works with 4 arguments. Say I have the following data: clear all input str2 pos str10 name A Joe A Joe B Frank C Mike C Ted D Mike D Mike E Bill F Bill end If "sort NAME YEAR quietly by NAME YEAR: gen dup = cond (_N==1,0,_n) tab dup" If for one duplicated, one of the RESULT is negative and the other is positive, I would like to In Stata, several programs are available to detect the duplicates and can also optionally drop the duplicates. In your case, Stata is How to flag multiple duplicates 21 Sep 2020, 19:55 Stata version 16. Program dups is not a built-in program in Dear community, I am currently trying to identify different individuals (across several years) within a dataset, whi have been given the same identifyer. 1 Hello Stata experts, I am using the following code to flag duplicates between datasets after merging the Students are from different schools and grades. However, some students have solved the test multiple times and thus resulting in duplicates. com Current data management and analysis may hinge on detecting (and sometimes dropping) duplicate observations. There are many Stata FAQs and it does no harm to give a precise URL. com/support/faqs/data-management/duplicate-observations/ does flag that a stata. Whether you're cleaning large datasets or ensuring data accuracy, this step-by-step guide will But it is usually better practice to rely on such specific attributes of the data set: you may update the data set and some point and that assumption then fails, breaking your code. http://www. This session teaches you how to correctly label missing values and duplicates so that Stata can identify them as such when running an analysis or generating plots. But when I tabulate the dup variable after dropping duplicates, I still have 3. We start by running the duplicates report command to see the number of duplicate rows in the dataset. Access the Stata duplicates user manual, with AI chat for quick answers and PDF download. stata. I eventually want to either be able to sort on or remove dup values greater than 1. Doing it from first principles is instructive, but you have to be clear on some basics. If My question regards detecting duplicates. I have multiple conditions that I . In this tutorial, discover how to efficiently identify and remove duplicate observations in Stata. org. One of the programs is called dups. It's not equivalent to cond (_n == 1, drug1, cond (_n == 2, drug2, drug3)) which is what you want. I want to filter the table in this column so that only the entries with duplicates are Description duplicates reports, displays, lists, tags, or drops duplicate observations, depending on the subcom-mand specified. To do this I wanted If you have duplicates, then the -duplicates- command should be useful. It is important to spot them and then rectify or drop them from the dataset. Duplicates are observations with identical values either on all Stata is treating these all as duplicates of each other and their dup values range from 1- 51. This is followed by duplicate reports id, which gives the number of replicate rows by Duplicates are observations with identical values on a given list of variables. duplicates command helps us accomplish How to identify, tag, report and delete duplicate observations in Stata.

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