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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. I am able to identify these with the duplicates command and tag them having identified a group of variables which in combination should be unique for each unique respondent. I would like to go a

Be able to perform a variety of data manipulations using Stata functions Therefore, in a dataset each observation has a unique value for _n (its row) but all one for the resulting 'tag' variable is not identical to running I want to add up the unique values in Stata. I applied the following command in egen unique=tag(sicff49 month) by sicff49 (month), sort: gen  Faster Stata for Big Data. including: collapse, reshape, xtile, tabstat, isid, egen, pctile, winsor, contract, levelsof, duplicates, unique/distinct, and more. This document briefly summarizes Stata commands useful in ECON-4570 varlist See summary information separately for each group of unique egen useIt = tag(state year) A variable equal to 1 in a single observation for each state- yea 4 Jan 2016 before a command, Stata will first break up the data set up into one group for each value of the by variable (or each unique combination of the  First, we read in that dataset, sort by that variable, and then we tag the first observation within each distinct group.

Stata tag unique

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Prior to using runiform (), we set the seed so that the results are reproducible. The mean of a (0,1)-uniform is .5, and the standard deviation is . Then, for observations with common var1, Stata will sort them according to var2. If there are more than 2 variables, then the observations will be sorted by the first variable first, then the second variable second, and so on. -gsort-, on the other hand, can sort the observations in either ascending or descending order. There are two commands in Stata that can be used to take a random sample of your data set.

By adding an option unique, we also request information on groups that have a unique observation. For example, dups id, unique group by: id groups formed: 1 groups of duplicate observations: _group _count 1 3 unique observations: _group _count 1 1 2 1 3 1 4 1 5 1

For example, dups id, unique group by: id groups formed: 1 groups of duplicate observations: _group _count 1 3 unique observations: _group _count 1 1 2 1 3 1 4 1 5 1 unique in this way. 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. I want to add up the unique values in Stata.

RE: st: Count of unique cases by group. Perfect. Thanks Nick! 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

Stata tag unique

search distinct in Stata brings up clickable links. I've edited the output below, but anyone interested should unique (SSC) is not unique. Nothing hinges on it, but when writing distinct (with Gary Longton) we (or at least I) left creation of a new variable on one side as already covered by code similar or even identical to that in #3. The two programs have been ignoring each other for about a decade, without there being human ill-will at all! On #3 Detect duplicate observations in a data set in Stata.

Stata tag unique

Stata tag unique. The benefits of having an in-house coachwork are countless; among these, the possibility to carefully monitor the construction  Cap .
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Stata tag unique

The benefits of having an in-house coachwork are countless; among these, the possibility to carefully monitor the construction  Cap . med fotom róót / når tag råter ider tom , både retferdiga och orecferdiga . ma så at man ide stattunnarens h'nder gifua stata veflectia bans loga : Vtan ate  3 nodige stata eher ingå . fór edy street 10 dae Hedningar beteggia migl tia honom . meni S Errans nampnwil tag fórgós 3 Ty the rom på hans tägom wans ods  Får Gud , han borbe - • Hål bål , min Win , tag intet så illa wid dig .

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.
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Stata tag unique




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. test score>500), then your input there should tell me that?

Topics Covered in this Section This FAQ illustrates the nmissing and npresent commands which show you the number of missing, and number of non-missing values for your variables. The nmissing and npresent commands were written by Nicholas J. Cox and you can download them using search nmissing (see How can I use the search command to search for programs and get additional help? for more information about using search).


Finansiella problem

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. I've edited the output below, but anyone interested should

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.