countmatch counts observations for which each distinct value of var1 is Downstream of this you may wish to list each person and the corresponding count just once, and egen's tag() function offers (In an updated Stata 8, use l

7 Mar 2012 Repeat Stata command on subsets of the data 25 cd . Report, tag, or drop duplicate observations 164 edit . tabulate(#) specifies the number of unique values of the variables to use to determine whether a variable is

Case 1: Identifying duplicates based on a subset of variables. You wish to create a new variable named dup Se hela listan på stata.com 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, Tony Brady, 1998. "UNIQUE: Stata module to report number of unique values in variable(s)," Statistical Software Components S354201, Boston College Department of Economics, revised 18 Jun 2020. RE: st: Count of unique cases by group. Perfect. Thanks Nick!

Stata tag unique

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. . sysuse auto, clear . by rep78, sort: gen nvals = This is an updated version of Michal McMahon's Stata notes. To avoid this problem we can specify a new variable that will be a unique cluster identifier again: Tags can take two forms, either a tag applies to all text that fol Next, tag the unique ID variables (HHI2_UID) for all household members.

Se hela listan på stata.com

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.

Discover how to tabulate data by one or two variables, how to create multiple oneway tables from a list of variables, and how to create all possible twoway t

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. 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. In the example below, we use runiform () to create a simulated dataset with 10,000 observations on a (0,1)-uniform variable. Prior to using runiform (), we set the seed so that the results are reproducible.

1. 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.
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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

sysuse auto, clear .