Stata list specific observations. Suppose we want to keep just the cars which had a .

 

Stata list specific observations. I do not know how to specify inrange so that it takes the average of all observations with a date (variable is DATE, formatted as %td) in the range of the observation date and the 365 previous days. Sep 5, 2020 · Stata has variables and observations, which have important differences from arbitrary rows and columns in Excel. Apr 13, 2020 · 1) I can only have a yes per observation on only one of those variables and the rest has to be no 2) If i have an unknown it has to be on all 7 variables (i. So, same observations from 1995 to 1998; from 1999 to 2004; and so on. Describe your dataset. 5 0. I want to capture and keep all tickets on routes that were serviced by a certain airline (let's say United). I would like to keep only the first row per ID. I don't know whether these calculations should be done within both uniquetardeal_id and deal_id or just one of them--adjust as needed. 16 0. The Sometimes the output of the list command can be clumsy, showing an entire observation with all of the variables wrapped across the screen. For example, in the sample below, if I would like to calculate the average of the previous observations for line 10, I have to consider the observations of the previous 90 days of date, and take into account only the observations that correspond to the most recent appearence of indiv. uk Nov 12, 2020 · I have a basic question, which I still have not been able to solve. g inside square brack. Mar 19, 2020 · Dear All, I am facing difficulties in dropping observations of some 300 variables and 140 of them have a common suffix. I want to combine all of the observations that share an id and a date in such a way that if at least observation has a value of "1" in a dummy variable, the combined variable will also have a value of "1" in that dummy. For example, I have a variable of jobtitle and the observations can vary "CEO" "Chief Executive Officer" "President" "President & CEO" "President & Chief Executive Nov 16, 2022 · Thus [1] denotes the first observation, and [_N] denotes the last observation within each group. First let’s clear out the current file and use the auto data file. 4 0. Feb 16, 2022 · Hello everyone, I have panel data that include firm-years observations for many countries. Jan 16, 2018 · I would like to generate a new variable that takes as a constant an observation for another variable in a specific year. ) Then the list is restricted to values that are different. Use list to list data when you are doing so. For example, I would like to keep all observations for group 13, but the first observation for group 12 should be dropped and the first two observations for group 14 should be dropped. Mar 2, 2018 · (Dropping all countries which were including less than 30 observations each and every year; instead of only dropping the countries for the year(s) the number of observations was below 30 but keeping them in the panel data for the years they included more than thirty observations. The listing leaves ambiguous whether you have a string variable or are showing a numeric variable with value labels. (For more information on this, see FAQ: What is true and false in Stata? . gsort -price. exactly!" 3. What I tried so far is start with a loop but then I stuck on how to divide each value from the lines 2/_N through line 1. _N is Stata notation for the total number of observations. I have attached a sample data set. Sometimes you would like the data shown in columns without the observations wrapping across the screen. B. Mar 3, 2023 · When dealing with small databases, it might be easy to visually identify which observation was wrongly coded. Most importantly, varname includes some world countries where I'm only interested in the European (Slovakia, Slovenia, Czech Republic, Ukraine, Russia, Romania, Bulgaria, Austria, Germany, Iceland, Switzerland and the UK), which are the most important part of my analysis. Jul 16, 2019 · I have a database of around 50 variables and 200 observations. if " abs " comes before "def" . I'd like to see all unique characteristics from the particular variable (type: string), excluding all duplicated one. Nov 16, 2022 · * aggregated over stratum-specific results chi2(2) = 29. I want to drop only observations that don't have a market return of -2556. To list all the makes in reverse alphabetical order, we might type. You could implement Andrew's solution fairly generally with the following code. 0 trying to store a variable value from one observation in a local macro (if the variable is a string) or in a scalar (if the variable is numeric). I cannot get the code to work because Stata does not allow "if" when defining locals and scalars. Individuals are observed over several years. So your code could look like: replace var1 = var1[6] if obsID==5 This replaces the var1 with the value of var1 at Stata observation 6 if obsID==5. After running the above command, the above results will be obtained. Listing the duplicate observations. dta describe using "`r(fn)'" // or ask for only one variable e. But if they disagree on other variables, then using this command would arbitrarily select one of the several records to retain and throw away the others. To see the contents of matrices you must display them using Now you have to remember your obsID variable and the observation number according to Stata may be different. In the case the Brand = n/a, Brand should become the same as Retailer. com and regular syntax of Stata commands. list make price in 1/10 gsort can also be used with string variables. If the corresponding values differ, diff will be 1, and, if they are the same, diff will be 0. The keep if command can be used to eliminate observations, except that the part after the keep if specifies which observations should be kept. ts is optional. However for some of my analysis I only want to display the observations that have a unique id. Below a simplified version of my data set: Country GDP Year StartPos AT 1 2000 1 AT 2 2001 1 Stata is limited in how it tracks changes in the sort order and will sometimes decide that a dataset is not sorted when, in fact, it is. For example, from the following database, I would like to replace the word quantity with the value 0 in variable 1 and 2. 12 0. Please see my example below. Stata variable names are case sensitive. While the list of results returned by return list and erturn list show you the values taken on by most of the returned results, this is not practical with matrices, instead the dimensions of the matrices are listed. In the case of the Cox proportional hazards model, However, right now I have multiple observations with the same id and same date, but with different values on some dummy variables. N. Dear Statalisters, Suppose I have the following data set: var1 var2 var3 0. One of the reasons people ask questions on SO is because the included documentation is not clear. g. For instance, if we were to change the first observation of our automobile dataset from 12 miles per gallon to 10, Stata would decide that the dataset is “Sorted May 8, 2017 · Dear Stata Users, I have a small challenge. Nov 23, 2013 · year is the year of the observation; dyrstr is the founding year of a firm; Lack equals 1 if there is a missing observation in the year before (e. Oct 14, 2020 · and my variable vote reports the percentage of votes in governmental elections expected from specific European countries. The above data is a subset of a bigger dataset, details of which are not really relevant for this question. Here is sample data: Apr 19, 2018 · Identify observations of a string variable which contain a pair of characters in a specific order 19 Apr 2018, 11:53 I want to identify those observations of the string variable ( x ), which contain pair of characters " abs " and " def ", in that order: i. Code: list if myvar == 5. list v1 v2 v3, mean sum clean. sysuse auto , clear . May 31, 2017 · If, in the child data set, all of the observations that have the same value of id and wave also agree on all the other variables, then this is a reasonable way to proceed. I know I can do it this way: Mar 29, 2019 · I have not tried to correct inconsistencies in what you show us. Sep 4, 2016 · I would very much appreciate a worked example. ". . Let’s illustrate using keep if to eliminate observations. Jan 24, 2018 · You can't do this. Dec 8, 2022 · For each of this period, I want to "expand" the years and to attribute the observation of the first year of the period (which I actually have, see below) to the following years of the same period. However, this process might be difficult if we have a large database containing many observations. Also, please note that the code above will drop all observations (rows) for which cancer, diabetes and highbloodpressure are 0. Jun 1, 2016 · How can I replace an observation with the value of a other observation? I have some observations with Brand = n/a, but I have the name of the Retailer. Aug 10, 2016 · Your closing question is about identifying cases (Stata says observations) for which a variable takes on a particular value and the answer is like. Results listed under "matrices" are, as you would expect, matrices. gsort -make. Mar 29, 2018 · If Stata fails to recognize "obsID" then use the -describe- command to make sure the spelling and capitalization is right. Adding a summary observation to a dataset will only lead to problems when you try to do analysis using that data. Add the mean and sum of the observations at the end of the table, and suppress separator and divider lines. list v1 v2 v3, separator(10) header(20) Same as above, but draw separator line between values of v1 and do not show the header list v1 v2 v3, sepby(v1) noheader. Jul 1, 2019 · is my best guess (sorry, new to stata and related programs in general!). Oct 20, 2014 · Thats fantasic. . According to these results, 26 observations are unique but 8 observations in cross-section and time data that are duplicates. What I need to find out is: per fund id : how many observations are there between the actual monthnum[_n] and monthnum[_n]-36. For. 1/IC on Mac. Dropping String Observations that Contain specific word 06 Jul 2014, 11: Feb 12, 2017 · While cross checking with my calculations in excel, I rather think that stata is not exactly calculating what I am looking for. May 22, 2022 · I'm using Stata 16. Any thoughts? Thank you! ps I work in Stata 13. describe rep78 display r(N) 74 May 29, 2018 · If for an observation 3 of those criteria are true, using this code, this hypothetical observation would be assigned a missing value. in line three of the dataset, Lack equals 1 because for the firm with ID 2432, there is no observation in the year 2004) total_workers is the number of workers Mar 24, 2023 · I'm trying to create a loop that automatically replaces all observations with a ". 2 0. However, most of your question seems more general. 2 and Stata MP 12. Oct 3, 2016 · Dear Stata Community, I am very sorry if this question is rather basic, but I am desperately seeking help for my master's thesis. The question from the beginning (#1) was in the context of the reconstruction of a mathematical formula in stata. 430–432 Stata tip 36: Which observations? Nicholas J. Jan 31, 2017 · Is there a way to do e. 27 but only if the country is "BR" and the year is "2009". Your central calculation is averaging two previous values. Sep 2, 2014 · Sarah is spot on here: in Stata [NB; not STATA] a loop over observations is rarely needed and indeed the tool of last resort. We will cover enough to get you started; help language has more information and examples, and [U] 1. findname (SJ) is an effect a superset of ds with (in my view) improved syntax. 0000 Stata can fit Cox proportional hazards, exponential, Weibull, Gompertz, lognormal, log-logistic, and gamma models. Missing is generally expressed in Stata as a dot ". ac. keep track on an initial position. e I cannot have an unknown mixed with a no and a yes) 3) If i have missing data it has to be on all 7 variables. So in this case help list might seem like a great idea, but the result is fairly incomprehensible. Note there's not need to observe the individuals only in those waves: the individual can be also observed in wave 1 but I want to be sure it appears in wave 2,5 and 6. Re: st: Sum of specific observations of the same variable From: Nick Cox < [email protected] > Prev by Date: -charlist- update available from SSC [was: Re: st: charlist syntax error] Feb 14, 2019 · I see 'unique' or 'distinct' commands will show the total number of unique values in the variable, but they don't actually list each of the unique values. I'm slowly uncovering the problems as we work along it. But what do you mean by "coding for -66"? Is "-66" the missing value code used by the data provider, and now you want to use the Stata missing value code? Jan 4, 2021 · I have an employer-employee database and need to keep only the individuals that have at least one colleague considering the Firm_id variable, but I don't know how to do this in Stata. Apr 18, 2021 · I have one dta file that contains millions of observations, with about 4 variables. 08 In this sense, I would like to generate a new variable, say var4, which may take one out of the 5 values presented (with equal probabilities). Sep 20, 2017 · For each group, I would like to drop all observations with status of "Bad" until there is a status of "Good", and keep all observations following a status of "Good". It's not just invalid syntax, it makes no sense. Please note that 0 is not missing. I need some help understanding the anatomy of the syntax because the one I'm trying is not working. There may not be observations that meet the specified criteria because this is a small sample (100 observations), but I can use the code in a full dataset. I have enormous data with repeating information. Jun 7, 2021 · Dear Stata community: I am interested in obtaining the adjusted R2, beta and the number of observations from a rolling firm specific regression with daily stock returns on daily index for the past 20 days with a rolling window of 5 days. If you want this to be "two or more" of the criteria, then you should change sum==2 to sum>=2 in the last line of the command. Jun 19, 2018 · This will drop all observations that have 0 as the value for those variables. if there are two observation in the year 2009, it would be great if Stata then randomly could decide which one to pick. _n is Stata notation for the current observation number. sysuse auto, clear display _N 74 Using the describe command will get you what you want:. Now to determine which observations are duplicates, the below command will be run: duplicates list symbol_code year Jul 6, 2015 · I am working with airline data. Let’s see how _n and _N work. I'm trying: Jul 7, 2019 · Hey, what should I use in a conditional statement in order to execute a command only on observations whose string variable (their name) contains a specific Login or Register Log in with Jan 10, 2023 · As shown above, it would potentially look something like shown in variable "% score", where 80% of the respondents that have answered in the time interval = 4 has given an answer which corresponds to the value 2 or 3. findfile auto. My dataset is Jun 17, 2024 · I want to divide each value for specific observations (in my task from line 2 until the end of dataset) to corresponding values from line 1 for a set of variables and than do a operation. You first list values of State but your variable in code is called States. Cox Department of Geography Durham University Durham City, UK n. I'm plotting a graph using GPI scores from 2014 and 2010, hence I want labels called SYR14 and SYR10, however because both sets of data are in the same row, when using the above technique you create a label for SYR14 but when you go to create one for SYR10 it just overwrites the SYR14 one. I want to flag any observations that do not meet the conditions above. You can keep or drop a variable in its entirety, but you cannot do so only in some observations, as the syntax attempts to do. Here is a illustration of parts of the formula, which is related to my question. X1,X2 and X3 as listed below. Nov 24, 2014 · "Say exactly what you typed and exactly what Stata typed (or did) in response. Jun 12, 2016 · wherein the IndividualNumber variable signifies ID of the individual. The Stata Journal (2006) 6, Number 3, pp. Perhaps what you really mean is that you would like to replace values of EBCreceived with missing values if year >= 2008 & month >= 7. 8 0. he list command,varlist is optional. " with exception to the observations associated with a specific Location. I am looking for a specific observation, per each individual, among the many. Jan 21, 2020 · Consider the following reproducible example using Stata's auto toy dataset:. lp list:listvarlistifin , optionsHere is how to read this syntax: Anythi. You can browse but not post. How can you delete observations from a variable that contains strings that have the specific word for instance. If you have a look at help list, you will discover plenty of options to customize the display. ) I would highly appreciate any further suggestions. Attached is a sample of my dataset. j. I know how to do this for every month with rangestat: Aug 2, 2018 · Let's assume you have a variable deal_date that is constant within deals. 46 Pr>chi2 = 0. I wish to create a random variable drawn from a standard normal distribution specific to each individual over all years. list make price in 1/10 To list the 10 highest-priced cars in the data, we could type. Suppose we want to keep just the cars which had a (c) If tie in (b) use observation with lowest value of Year. varlist is a li. Jul 6, 2013 · 12. All these 140 variables end by _xt and I want to drop observations for all the 300 variables if at least one the 140 variables ending by _xt has a value <= 5. Use input to type in your own dataset fragment that others can experiment with. Each observation in the data is a ticket, which provides the route, carrier, price, among other things. Stata has two built-in variables called _n and _N. It cannot be used to set observations on a variable for a subset of cases to missing I understand that you - want to keep the variable 'var1' in your dataset - want to keep the observations from 1997 in your dataset I suggest you try May 7, 2017 · Then the largest ethnic group has sorted to the bottom. See full list on stata. Use the advanced editing options to appropriately format quotes, data, code and Stata output. 4. So if it occupies all of the bottom 90% of the observations in the district, then the same ethnicity will be found in the final observation and in the observation that is 10% of the way down. 25 0. This holds for a lot of different retailers, so is there a easy solution for doing this at once. 1. _n is 1 in the first observation, 2 in the second, 3 in the third, and so on. I have tried to look at stata forum and FAQ but could resolve this. I am using Stata SE 11. You can create a variable sum5yr (note that your proposed variable name 5years is illegal in Stata) with the following code. You can obtain an add on program called listblck that can do this. Finding that exact observation is a tiny bit tricky because _N/10 will usually not be an integer. If you set up your data as panel data using tsset or xtset then the calculation is quite possibly as little as one line using time series operators. You can use the list command for this: or. I would use this to e. Jul 23, 2014 · The "drop" command tells Stata to delete a variable (column) or cases (rows) from the dataset. I would like to replace with the value 0, in those observations that says in the all variables the word 'quantity'. Now this could all be simplified if obsID matches Stata's observation numbers. For example individual 99 appears on 13-Févr-85 and 27 Jul 6, 2014 · Forums for Discussing Stata; General; You are not logged in. Please find below the data example. tab of only the observations with a unique id? I know I can drop duplicates, but I need them later. I only want to look at a subset of this data, for which the variable username is contained in a list of a few hun Aug 28, 2014 · Hi, I have a dataset where I have multiple observations per individual. cox@durham. 3 0. In addition if the above criteria is not able to single out one observation per Id, e. Is there any Stata command that searches for non-numeric characters within a string variable and lists the observations that have this issue? Jun 4, 2021 · How can I get those observations that appear lets say in waves 2,5 and 6. 32 0. list make Example 2 gsort can be used with multiple variables. e. Oct 16, 2019 · I want to extract a list of my panel IDs named as "FI" and months/years named as "Time_period" having the 10 maximum and 10 minimum values corresponding to three variables i. dysgrc ebg bjx djieul ahf svm exap dyj erjdlb poi