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. Intercooled Stata, a

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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.

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. 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.

If you want to count distinct IDs, as I guess you do, count() is irrelevant, as it counts non-missing values regardless of how many distinct values that means. Here is a demonstration. The data are 666 values of 42, but count() returns 666, not 1.

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Count unique values in Stata. codebook is a great command in Stata. It describes data contents but also simply identifies unique values. Number of unique values of mpg is 21. Looking at the help of the command, it does not seem possible to store this value.

All we need to do is tag the first occurrence of each distinct value, and then count those first occurrences in sequence. 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.

isid x1 x2 x3; The duplicates command can list and flag duplicate observations. The list subcommand lists the duplicate observations: . duplicates list x1 x2 x3 So, if I have, e.g.
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How to drop Here I create a local containing all the unique elements of the variable levels. The Stata command isid idvar , where idvar is the ID variable, tests for both the typically ensures that no observation has two distinct ID variable values. 13 Abr 2007 Cuando se usa el comando “use archivo”, Stata (i) verifica si el archivo Single- user Stata for Windows perpetual license: unique values: 74.

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. In the results, each observation contains a unique tag and a count of the number of times that 17 Oct 2017 Hemos creado un pequeño programa Stata llamado mdesc que cuenta el Usamos el comando duplicates tag para crear una nueva variable 9 Jun 2012 isid - Checks if data is unique by a listed variable().
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Stata has two built-in variables called _n and _N. _n is Stata notation for the current observation number. _n is 1 in the first observation, 2 in the second, 3 in the third, and so on. _N is Stata notation for the total number of observations. Let’s see how _n and _N work.

Thus unique observations are tagged with value 0, and all duplicate observations are tagged with values greater than 0. For checking double data entry, in which you expect just one surplus copy for each individual record, you can generate a tag variable and then look at observations with tag not equal to 1 because both unique observations Stata: Generate new variable with all values (e.g.

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

For Java, you could already compile Java code into .jar files and call those as plugins from Stata. Now you can embed Java code directly in your Stata do-files and ado-files, just like Mata code and Python code.

I want to add up the unique values in Stata. I applied the following command in Stata and realized afterwards that I am actually adding up duplicates as well, which is not what I intended to do. 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. 2016-03-10 · Random numbers from the uniform distribution.