Generate repeated numbers in stata. dup = 0 record is unique.

Generate repeated numbers in stata That is closer to some SMCL syntax but quite distinct from it. Stata tip 13: generate and replace use the current sort order. Feb 16, 2020 · In Stata, how do I create new variables based on greatest number of unique values in a group and replace values by group 1 Use Stata to generate new variable, based on combination types of variables Stata has two built-in variables called _n and _N. 3. and G. _n is called an “underscore variable”. Nov 16, 2022 · Different sequences of consecutive numbers can be generated by using an expression that includes _n for x and by setting y equal to the total number of observations within each repeated pattern. Oct 2, 2016 · In Stata, how do I create new variables based on greatest number of unique values in a group and replace values by group 0 Stata: how to duplicate observations? The rationale for changing a value is to mimic what may happen in practice; we often search for "duplicate" cases that are not identically entered into the dataset. These functions are deterministic algorithms that produce numbers that can pass for random. Tagging Duplicate Observations. This number increases from 1 at observation 1 (cd1 first occurs), to 2 at observation 2 (cd2 first occurs), to 3 at observation 4 (cd3 first occurs), and so forth. Thus be careful to exclude missing values where appropriate. J. You can do the above by using by:, which is one of the most versatile features of Stata. _N is Stata notation for the total number of observations. You wish to create a new variable named dup. > is this possible? Nick On Wed, Oct 17, 2012 at 7:06 PM, Jason Rosenberg <[email protected]> wrote: > hi, I am trying to generate a continuous sequence in stata for curve drawing puposes. The following code will come in handy for this tutorial:ssc install seqset obs 144000set seed 120 Nov 16, 2022 · I want to keep track of the number of distinct values seen so far in the sequence. Stata in fact has ten random-number functions: runiform() generates rectangularly (uniformly) distributed random number over [0,1). For an extended version of this FAQ, see Cox and Longton (2008). I want to generate a variable that tells me how many ID´s each place has. This looks like something many people need, but I couldn't find an answer. 1. Remarks and examples stata. See full list on stata. 2set seed— Specify initial value of random-number seed Setting the seed Stata’s random-number generation functions, such as runiform() and rnormal(), do not really produce random numbers. com Mar 10, 2016 · In this post, I showed how to generate random numbers using random-number functions in Stata. 41 Model F test Nov 16, 2022 · The loop runs over the integers from 2 to the number of observations _N. The command can specify the beginning number (f), the ending number (t), and how many times each number is repeated (b). The solution. J. In particular, Stata 14 includes a new default random-number generator (RNG) called the Mersenne Twister (Matsumoto and Nishimura 1998), a new function that generates random integers, the ability to generate random numbers from an interval, and several new functions that generate random variates Instead I would like to generate 326 rows with say 3 columns with each column having a different value repeated 326 times. Mar 10, 2016 · In this post, I showed how to generate random numbers using random-number functions in Stata. Mar 22, 2018 · I would like to have a table with the ID columns as the one below. Nov 16, 2022 · _n is the Stata way of referring to the observation number; in a 10-observation dataset, _n takes on the values 1, 2, , 10. there are some requirements for the ID columns. Jul 2, 2019 · Within each state, I have generated a unique id to identify mobile numbers using the following code: However, in the master data set (with over 600,000 mobile numbers) there are several that have duplicates. Thus in family 1, both parents have three children living with them, whereas in family 2, both the grandmother and her daughter have one child each living with them. M. Uses egen count() with by, to create two new variables recording the raw number of employed / unemployed people in the region. Thus, with the auto data, we could cycle through all the values of foreign or rep78. How can I create another var Aug 14, 2015 · I'm using the clustercommand and am having difficulties due to insufficient memory. When _n is combined with by, however, _n is the observation number within by-group, in this case, within oldid. How can I ensure that all the mobile numbers that are repeated get assigned the same id? > hi, I am trying to generate a continuous sequence in stata for curve drawing puposes. _n is Stata notation for the current observation number. ) That done, we can fit the model: . For other examples applying tsspell, please see its help file. Distinct observations. 0. is treated as larger than any positive number. You can also use the SMCL syntax. mi estimate: regress y x1 x2 Multiple-imputation estimates Imputations = 5 Linear regression Number of obs = 50 Average RVI = 0. 88 avg = 27. Jan 10, 2022 · Assuming that in Stata e. 2995 Complete DF = 47 DF adjustment: Small sample DF: min = 20. runiform() produces numbers that can pass for independent The command can specify the beginning number (f), the ending number (t), and how many times each number is repeated (b). Stata Journal 4: 484–485. Here is some technique: Nov 16, 2022 · Different sequences of consecutive numbers can be generated by using an expression that includes _n for x and by setting y equal to the total number of observations within each repeated pattern. The random numbers will not actually be between a and b: they will be between a and nearly b, but the top will be so close to b, namely 0. How can I ensure that all the mobile numbers that are repeated get assigned the same id? Sep 13, 2017 · How can I create a numlist of b replications of a? display supports a _dup() syntax but the underscore is essential and any curly brackets (braces) are either superfluous or a source of difficulty. Here is some technique:. In subsequent posts, I will delve into other aspects of RNGs, including methods to generate random variates from other distributions and in Mata. Let’s see how _n and _N work. rbeta(a, b) generates beta-distribution beta(a, b) random numbers. , 600 to 1201) and I also need to specify the conditional if to be able to generate those values only for a particular group of observations that meet certain criteria. _n is 1 in the first observation, 2 in the second, 3 in the third, and so on. Creates a fifth new variable, the unemployment rate I actually want, by calculation from the raw numbers. Nov 16, 2022 · Starting with Stata 8, the duplicates command provides a way to report on, give examples of, list, browse, tag, or drop duplicate observations. generate double u = runiform() Aug 3, 2012 · To generate continuous random numbers between a and b, use generate double u = (b–a)*runiform() + a. Longton. Any name can be given in place of dup. > > Now I have this: > > egen number = seq() > > but I would like increments of at least 0. the original and the copy), which can be identified by the new variable dupindicator that is defined as 1 for the duplicate, and 0 for the original variables. Reference Newson, R. To generate integer random numbers between a and b, use Dec 22, 2017 · Learn how to create repeating sequences of numbers in Stata. recode—Recodecategoricalvariables Description Quickstart Menu Syntax Options Remarksandexamples Acknowledgment Alsosee Description Jun 17, 2014 · Stata Duplicate/Split Observations Each Time Variables not Equal. 2008. This was done to make clearer the difference from the Stata function sum(), which produces cumulative or running sums. Jul 3, 2018 · I want to create a new variable which will increment by one when a new number comes up in the original variable. Speaking Stata: How to move step by: step. To add the duplicate observations, we sort the data by id, then duplicate the first five observations (id = 1 to 5 We would like to show you a description here but the site won’t allow us. This FAQ is likely only of interest to users of previous versions of Stata. One of them is an ID and another one is Place. Nov 16, 2022 · Recall that numeric missing . forvalues i = 10(-2)1 {2. 4. In the dataset, the variable id is the unique case identifier. 2004. 2002. How can I write Oct 15, 2015 · I want to generate a variable that contains random values within a specified range (e. 2488 Largest FMI = 0. 999999999767169356*b, that it will not matter. 1 would be perfect. Creating duplicate observations to compare as variables in Stata. I have one stacked variable (in column 2) of stock returns with data populating range of 1 to 2000000 (some blanks are replaced with dots). Each actor or partner should have a unique ID. To get around this problem I would like to delete all duplicate observations. 5, 0. The problem is to create a variable ownchild giving the number of each person’s own children living in the family. Data, even fake data, help. g. Option for duplicates drop force specifies that observations duplicated with respect to a named varlist be dropped. generate—Createorchangecontentsofvariable Description Quickstart Menu Syntax Options Remarksandexamples References Alsosee Description generatecreatesanewvariable generate(newvar) creates new variable newvar containing 0 if the observation originally appeared in the dataset and 1 if the observation is a duplicate. Cox, N. display ‘i’ 3. I would like to cluster via the variables A, B and C and I identify duplicate values as so: expand—Duplicateobservations Description Quickstart Menu Syntax Option Remarksandexamples References Alsosee Description Jul 18, 2012 · I want to start a series on using Stata’s random-number function. In that case, the tag command will be used after the duplicate command and then generate the new variable that will be named dup. } 10 8 6 4 Nov 16, 2022 · (Complete + Incomplete = Total; Imputed is the minimum across m of the number of filled-in observations. the inputs will be repeated 326 times Nov 16, 2022 · Different sequences of consecutive numbers can be generated by using an expression that includes _n for x and by setting y equal to the total number of observations within each repeated pattern. Sep 8, 2014 · family_no subject case mom dad first sibling last 10096802 03 0 0 1 0 0 1 10096802 01 1 0 0 1 0 0 Jun 19, 2019 · 2. Drops the variables used only for this process. Mar 10, 2016 · Overview. com Example 1 expand is, admittedly, a strange command. May 1, 2022 · You can use: bysort ID : gen visit = _n. To produce such random numbers, type To produce such random numbers, type . 58 max = 35. > is this possible? > > I plan on using it in this equation duplicates—Report,tag,ordropduplicateobservations5 Thiscommandhelpsyouproduceadataset,usuallysmallerthantheoriginal,inwhicheachobserva-tionisunique(literally Oct 8, 2019 · The 2 tells Stata that there should be two copies of the same observation (i. For example, the two sequences above can be generated by the commands seq a, f(1) t(3) and seq b, f(1) t(3) b(3) This command can use initial integers other than 1 and can produce decreasing sequences. Instead of dropping the duplicate, it is required to tag the duplicate observation. e. generate(newvar) is required and specifies the name of a new variable that will tag duplicates. One common pattern is to cycle through all values of a classifying variable. For instance, after an expand, you could revert to the original observations by typing keep if newvar==0. References Cox, N. For example: 35 1 35 1 37 2 37 2 37 2 40 3 I thought about using the by or bysort commands but none of them seems to solve the problem. 2forvalues— Loop over consecutive values lists the numbers 1–5, stepping by 1, whereas. I also discussed how to make results reproducible by setting the seed. With his new variable, the duplicates can later easily be identified and dropped if necessary. I describe how to generate random numbers and discuss some features added in Stata 14. dup = 0 record is unique. Aug 29, 2012 · Stata’s runiform() function produces random numbers over the range [0,1). > but I would like increments of at least 0. Jan 19, 2018 · Hello, I have a number of variables. Apr 8, 2016 · Note in passing that while egen's sum() function works fine, it has been undocumented since Stata 9: there is now an equivalent total() function. Stata Journal 2: 86–102. The duplicate observation of symbol_code was removed. rbinomial(n, p) generates binomial(n, p) random numbers, where n is the number foreach offers a way of repeating one or more Stata commands; see also [P] foreach. tablemultiway—Multiwaytables Description Quickstart Menu Syntax Options Remarksandexamples Storedresults Reference Alsosee Description Inthisentry Nov 16, 2022 · distinct reports on distinct values, egen, nvals() computes their number in a new variable, and unique does some of both. I have a longitudinal dataset in Stata in which IDs are repeated, I want to generate a new variable which repeats the number of IDs (like the column "visit" in the image). jpkd myyeaoz tzlddz yhpuim zxld pbkl gohatr fpozpi oske enxpl coa szhgc upfj ayo hcel