[PDF] duplicates, stata.com duplicates — Report, tag, or drop duplicate observations. Title stata.com isid — Check for unique identiﬁers DescriptionQuick

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. lname() speciﬁes the name to be given to the value label created to hold the labels; lname() implies label. The

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. 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. 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.

Stata tag unique

2016-07-13 · Stata for Students: Descriptive Statistics. This article is part of the Stata for Students series. If you are new to Stata we strongly recommend reading all the articles in the Stata Basics section. Descriptive statistics give you a basic understanding one or more variables and how they relate to each other.

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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).

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.

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.

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You can use any of these by typing sysuse name. The Stata website is also a repository for datasets used in the Stata manuals and in a number of statistical books. 2.2 Reading Data Into Stata. In this section we discuss how to read raw data files. Overview. I describe how to generate random numbers and discuss some features added in Stata 14.
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This indicates that all observations are part of both files. If there were observations. 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 have tagged the number of occurrences of each unique anonymised id (ida) by date using the code below to give me scan number (snum). 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. 1 Intro/Note on Notation. Coding in Python is a little different than coding in Stata.
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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,

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. 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. 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.

stata怎么求不重复值的个数？,位stata高手，怎么才能找出不重复值的个数？变量A的那一列里有很多值是相同的，我想生出不相同值的个数，用su A的出来的是所有观察值的个数。

I need to find duplicate enteries for villageid's for each attendance value, if they exist. Is there a way I can tag them ? Best Our nickname for all the ways you can connect Python and Stata is ‘PyStata‘. 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.

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.