2020-12-02 · A guide to using Stata for data work. It is always a good idea to browse and describe the dataset before you delve into it.. To obtain summary statistics of all the variables in the dataset, simply type summarize.

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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 bysort A B C : gen tag = _n == 1 tags the first occurrence of duplicates of A B C as 1 and all others as 0. For the other way round use _n > 1, _n != 1, or whatever. EDIT: So then the id of tagged observations is just .

tabulate(#) specifies the number of unique values of the variables to use to determine whether a variable is 21 Aug 2015 If we have converted FUNDA to Stata format, the uniqueness of GVKEY- DATADATE reveals that 99.8% of GVKEY-DATADATE pairs in FUNDQ are unique as of December 5, 2107. 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.

Thanks Nick! Your code has a number of additional insights (for me) in it over and above answering the questions.

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.

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 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.

* distinct households egen tag_hh = tag(hhid) count if tag_hh local n_hh = r(N) egen tag = tag(hhid s11211) bysort s11211 tag: gen freq = _N gen mean = string(freq/`n_hh', "%4.3f") tabdisp s11211 if tag, c(freq mean) ----- s11211 | freq mean -----+----- Buyer | 7 0.117 Collection trader | 16 0.267 Cooperative | 15 0.250 Market | 3 0.050 Middlemen | 6 0.100 Processing plant in town | 1 0.017 SHG | 1 0.017 Target crops are not sold. | 1 0.017 Trader | 19 0.317 VFC | 6 0.100 -----

The list subcommand lists the duplicate observations: . duplicates list x1 x2 x3 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 unique in this way.

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. You can check for duplicate observations in Stata in the following ways: The isid command can detect duplicate observations: . isid x1 x2 x3; The duplicates command can list and flag duplicate observations.
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location-tag They do not store directly personal information, but are based on uniquely identifying your browser and av E Håkansson · 2018 — today are not adapted for this type of stock and trade because of the unique Analysen använder programmet Stata och baseras på en linjär regression med en liten sannolikhet att företag faktiskt lyckas få tag i en fastighet i det önskade Explore Instagram posts for tag #sadsymphony - Picuki.com. 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. The benefits of having an in-house coachwork are countless; among these, the possibility to carefully monitor the construction Cap .

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. * distinct households egen tag_hh = tag(hhid) count if tag_hh local n_hh = r(N) egen tag = tag(hhid s11211) bysort s11211 tag: gen freq = _N gen mean = string(freq/`n_hh', "%4.3f") tabdisp s11211 if tag, c(freq mean) ----- s11211 | freq mean -----+----- Buyer | 7 0.117 Collection trader | 16 0.267 Cooperative | 15 0.250 Market | 3 0.050 Middlemen | 6 0.100 Processing plant in town | 1 0.017 SHG | 1 0.017 Target crops are not sold. | 1 0.017 Trader | 19 0.317 VFC | 6 0.100 ----- In the dataset, the variable id is the unique case identifier.
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lname() speciﬁes the name to be given to the value label created to hold the labels; lname() implies label. The 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. One logic behind that terminology is that if you remove all the duplicates from these data, then you are left with four distinct values, each of which occurs once. The 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. You can do the above by using by:, which is one of the most versatile features of Stata. One clue to by: being useful here is the structure of a grouping of the variable x into several distinct values.

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

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

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