We can check the results either through the browse window or by checking the mean of the wage_avg variable for each race. (i am new to the list, looked at the manuals but they explain using "collapse" across only one Is my variable a discrete random variable, ordinal, or categorical? collapse (mean) ItemNum (first) Date, by (ID) it just takes the first date that the ID shows up, not the first occurrence of each unique date. * http://www.ats.ucla.edu/stat/stata/, http://www.stata.com/support/faqs/res/findit.html, http://www.stata.com/support/statalist/faq. collapse (sum) amount, by(id type) You are not logged in. For most Stata commands, the Consolidate different variables to one variable. Here is a link to an example using a bar graph. it just takes the first date that the ID shows up, not the first occurrence of each unique date. two conditions? We collect and use this information only where we may legally do so. Your email address will not be published. If the question is actually a statistical topic disguised as a coding question, then OP should edit the question to clarify this. collapse converts the dataset in memory into a dataset of means, sums, medians, etc. Pleased to hear that, but that wasn't my suggestion and it's not optimal. You are not logged in. How can we test whether other possible worlds exist? Hi, I have the following problem. Jorrit, yours worked perfect. I'm currently looking at a longitudinal data set filled with economic data on all 67 counties in Alabama. In this example, we want the sum of the number of hours worked and wages earned categorised by race. Which Paris metro station to alight for CDG international airport? observations represent averages, and the weights are the number of -----Original Message----- My data looks like this: In the above table, person 1 made two trips and three item purchases (because two dates are shown), person 2 made three trips. 2 30 c j variable (2 values) type -> (dropped) What Unique Property can Wind Magic have? collapse (mean) lfp College Mobil [fw=Pop], by(year) Nick's answer is better than mine, and good practice when string data isn't behaving as expected. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Why does `chrome://flags` return google.com? Data long -> wide From: owner-statalist@hsphsun2.harvard.edu How would you do that? "Eric G. Wruck" With this command, we want the data collapsed down to the sum of wage for each category of race, and the mean of hours for each category of race. Each variable represents a depth measurement (integer) at a separate site, and the integers range from -3 to 6. 3 . sysuse auto . To learn more, see our tips on writing great answers. Asking for help, clarification, or responding to other answers. > Thank you. Unconventional ranged weapon for primitive sci-fantasy race? This value of wage is weighted by the number of hours worked. From > I am using a logit model where the dependent variable is risk of infection (high/low) and independent variables are gender, age, income, and pathogen load. 2 c 50 Temporary policy: Generative AI (e.g., ChatGPT) is banned, How to collapse numbers with same identifier but different date, but preserve the date of first observation for each identifier, Keep unique IDs depending on frequency of occurrence, Duplication of data entries by id if they meet a certain condition, Computing a weighted Average per observation (Stata), Stata: Keep the first observation by group, Filling missing observations with equal parts of the existing observation (Stata), Recovering Last Available Observation Per country Stata, R - Keep first observation per group identified by multiple variables (Stata equivalent "bys var1 var2 : keep if _n == 1"), Molecular simulation: Minimum Image Convention, Reshaping sparse arrays to have extra index. How to keep all possible combinations in collapse by multiple variables in stata? In the next example, we will collapse the data on a certain variables statistics again. the variance of the jth observation is assumed to be I have a data file from Survey Monkey in which a participant completed an online survey twice. some variables may have some missing values while others dont. 1 b 80 measured'as'a'numerical'categorical'variable,'Stata'will'not'be'able'to'recognize'the' differencebetweenthosetwo,whichwill'leadtoinaccuratedata. Making statements based on opinion; back them up with references or personal experience. 1 c 70 Thanks. Membership Trainings Then, each individuals proportion in this total number of hours worked is calculated as a percentage. Sometimes, when adding multiple variables to our collapse command, we may find that the number of non-missing observations do not match amongst variables, i.e. Liszt Transcendental Etude No.1 (Prelude) -- Piano zu 7 Oktaven -- which order to play? These cookies are essential for our website to function and do not store any personally identifiable information. The collapse command isnt the command you want to use. Re: st: How to collape across two variables. If a moderator of an online forum edits my post to say something illegal, how could I prove I didn't write the incriminating message? | id amount type | After adding the option, we can see that the output matches for both variables because the command only counted the number of observations where data for both wage and hours was present. This policy explains what personal information we collect, how we use it, and what rights you have to that information. Collapse a Data Set. Nothing seems to work, What to do if a core function does exactly what you need to do, but has a bug. After the statistical content has been clarified, the question is eligible for reopening. How to combine two data sets (level-1 and level-2 data sets) for multilevel analysis in R, Large data set, need PROPER way to calculate averages, F-Test for Equality of Variances with Weighted Survey Data. 4 . By starting my code with the preserve command it brings my data set back to its original state after providing me with the results I want. Is the word "field" part of the trigger warnings in US universities? You can use ds to create a list of variable names. These cookies cannot be disabled. * To get around this issue, we specify the name of the variable that should be created when storing the sum or the mean (or any other stat) of a variable. st: How do I compute quantile regressions using quantiles from auniform distribution? the variables are recorded in the dataset). Copyright 20082023 The Analysis Factor, LLC.All rights reserved. Making statements based on opinion; back them up with references or personal experience. From: "dnurhan" <dnurhan@eng.marmara.edu.tr> Prev by Date: st: New version of -lablist- on SSC; Next by Date: st: RE: Re: reverse variable order; Previous by thread: st: How to collape across two variables? help order in You have to determine which variable to use. Viewed 37k times. For data structures where a level two unit is observed over time, level two variables are variables that do not change over time. Hi All! After collapsing, I find the average income and age by postal codes amongst my observation. #1. The best answers are voted up and rise to the top, Not the answer you're looking for? 2. In this case I dont want to sum the values because they are in percent. Your new question appears to call for another, Stata Collapsing by first observation date when there are multiple date observations per ID, Stress test your code as you write it (Ep. Is there a way that I can collapse sum with Subject Conformal map between flat and hyperbolic torus with a boundary. For example, we could perform the same collapse as the previous command, however instead of collapsing on just the . It is mandatory to procure user consent prior to running these cookies on your website. Lets store this in a variable called total. The only thing Stata is missing is an easy way to specify variables v1, v2, .. An example of data being processed may be a unique identifier stored in a cookie. This website uses cookies to provide you with a better user experience. 1 Answer. I have dataset in stata and I would like to perform clustered bar graph with error bars. 02 Mar 2018, 10:39 Hi Everyone, I've come up against an issue I can't seem to solve! Weighted averages could be helpful with stock market data for various industries, where weighted average stock returns need to be evaluated. (stat) (stat) target var=varname. I need to Collapse(mean) variables 'income' and 'age' by postal codes but I want to take the weighted average so that I avoid the following problem. | 4001 25 1 | where clist is either. Collapse by multiple variables. If we were to replace (count) with (mean), the mean for wage would be calculated for its 1,746 observations. collapse clist. As an Amazon Associate, I earn from qualifying purchases. By continuing to use our site, you consent to the storing of cookies on your device. The observation level of a data set is the set of case-identifying variables which, in combination, uniquely identify every row of the data set. Hello, Running collapse command in Stata without losing key variables? From Login or. Thanks for detailed explanation! What if you wanted to collapse the data based on, say, both the mean and the sum of one variable? Each variable is associated with a specific level. sort id type About I seem to have again left out critical information and I am sorry for that. >ID $AMOUNT TYPE candidates in the data. st: Collapse (sum) observations by two variables? How do I get back to my original data? In order to introduce casewise deletion, we need to add the cw option to the command. 3. In this case, Stata cannot store the sum of hours and the mean of hours in the variable called hours. |----------------------| * http://www.ats.ucla.edu/stat/stata/, mailto:owner-statalist@hsphsun2.harvard.edu]On, http://www.stata.com/support/faqs/res/findit.html, http://www.stata.com/support/statalist/faq. Now, we will see how data can be collapsed based on multiple statistical parameters and multiple variables. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Columbus, OH 43209 Running the command above will be similar to running: The example above illustrated the basic function of the collapse command, but perhaps such a simple application will hardly ever be meaningful or useful. Its as easy as that. 2 10 a * http://www.stata.com/support/statalist/faq The first row has I = 1 I = 1 and J = 1 J = 1, and there is no other row with that combination. st: RE: Collapse (sum) observations by two variables? The next issue is that once it's collapsed, I need to take the mean of the count of the dates, not the date itself, which is also where I seem to be getting tripped up. Method/workflow for analyzing data with changing structure? Collapse allows you to convert your current data set to a much smaller data set of means, medians, maximums, minimums, count or percentiles (your choice of which percentile). Lets take a look at an example. In this short video, I cover how to take a variable on a larger scale and collapse it to substantially the same variable on a smaller scale through the use m. In the example above, our data would collapse down to just one observation and one variable, which would be the mean of variable wage. Connect and share knowledge within a single location that is structured and easy to search. No luck with either though. Each entry is a birth comprised of a lot of variables like date of birth year, date of birth month, illness, birthweight, and so on. Remember that because the total variable was calculated for each racial category, this proportion will also be the individuals proportion of hours worked within their own racial category. That is the number of unique groups. Thus, its not possible to keep your 0s and 1s as separate observations. it can be a list of variables, such as, or it can be all variables starting with a certain prefix, (meaning all variables named "rep" followed by something), or it can Each Item is given its own line, so if an individual has purchased two items on a date, that date will appear twice. What type of bit do I use to drill holes in hardened steel? If you continue we assume that you consent to receive cookies on all websites from The Analysis Factor. Why do some news say Chinas economy is bad yet still predicting its 2023 growth to be around 5 per cent? (I wrote tag () in 1999, and I am not aware of this as a misunderstanding.) 581), To improve as an engineer, get better at requesting (and receiving) feedback, Statement from SO: June 5, 2023 Moderator Action, Stack Exchange Network Outage June 15, 2023. You're right. In this situation I will use the population variable. When the names are in common, the variables are numbered sequentially, but they are not stored sequentially. Get to know Statas collapse commandits your new friend. Any suggestions on where to go from here knowing that? order, sequential is smart enough to know that v10 comes after v9 Does anyone know how I might do this? To Isn't most luggage sets oversized? 3 40 b Asking for help, clarification, or responding to other answers. You can also add multiple categories when using collapse command in Stata to collapse data. A general example using the collapse command in Stata is: The statistic name is the bracket refers to how we would like our data to be aggregated, followed by the variable name on which that aggregation is supposed to be based on. For example, in the data set. Date. Like this: Thanks for contributing an answer to Stack Overflow! If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Similarly, in the case of hours, for its 2,242 observations. . Thank you so much for your help!!! You would create your code in the same manner but would use a line graph rather than a bar graph. >Best regards, nurhan As can be seen, the collapse command in Stata was applied to the available observations for each variable, respectively. Rolling Beta and rolling mean, median in Stata, Correlation Analysis in Stata (Pearson, Spearman, Listwise, Casewise, Pairwise), Stata Command Modifiers if, in, by, bysort Qualifiers and Statements in Stata, Create a Portfolio and Calculate Portfolio Return in Stata, Standardized Variable, normalization and Mean Centering in Stata. Log in #1 Collapsing cases with string variables. The documentation for collapse is there inside Stata. The by option for collapse can take more than one variable so all you need. w . For instance, pretend that the order of the variables in the dataset is. This is due to reducing the number of observations for the variable in the by statement to just one observation. Collapse allows you to convert your current data set to a much smaller data set of means, medians, maximums, minimums, count or percentiles (your choice of which percentile). In this case, we want our data to be collapsed/aggregated into the mean of the variable wage. Syntax. | 4001 35 45 | preserve 15 Feb 2015, 14:13. You can have levels of one variable nested within levels of another variable in columns, in rows, or in both dimensions. amount -> amount1 amount2 You are not logged in. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. 1 10 a Re: st: How to collape across two variables? Thanks for trying to help and sorry I didn't make it easy. | 4001 2 45 | <statalist@hsphsun2.harvard.edu> Subject. Does Google still have the ability to uninstall apps without user permission (in 2023)? It looks like Survey monkey makes a blank string variable a space rather than leaving it completely blank and that is why it's not working!! 1. Now, lets collapse/aggregate the data based on the observation count of these variables. >4002 . >ID FOOD CLOTHING uses them. Five time periods by 67 counties give me a total of 335 observations. What is the meaning of "counter" as in "over the counter"? So I know I need to collapse on the date, but when I do. As an example, lets introduce some missing data to our data for wage. +----------------------+ stata Share Improve this question What I want to do is to combine multiple variables into one. Have you ever worked with a data set that had so many observations and/or variables that you couldnt see the forest for the trees? Of course you can order your observation based on ordering one variable, but you can go further and sort your data on multiple variables. However for collapsing, I want to reweight my variables in such a way that proportionately more weight is given to postal codes with more observations and less to postal codes with lesser observations. * http://www.ats.ucla.edu/stat/stata/ These values match the results we got from the collapse command above. However, now I want the data to look like so that there are 3 variables: date of birth year, date of birth month, total births. But opting out of some of these cookies may affect your browsing experience. We will now aggregate the data by the mean of the variable wage categorised by each category of the race variable. Thank you both! * For searches and help try: This ensures that the (count) or (mean) calculations only use observations where data for both the variables is available. You were on the right track w. collapse. (note: j = 1 2) 2 20 c st: How to collape across two variables? 2535 Sherwood Road People of Other racial backgrounds worked for 957 hours and earned a sum of 222.3203 dollars. We collapse our data using the by statement. The collapse command in Stata can be used to aggregate the dataset from Stata's menu options by following: Data > Create or change data > Other variable-transformation commands > Make dataset of means, medians, etc. Contact Blog/News Lets end this article with a breakdown of how a weighted average is actually calculated in an example like above. If I collapse (mean) I get decimals. if. Thanks for the help. 2 a 10 Can I remove this outlet and cord in my wall? In multiway tabulations, you can display frequencies across levels of two or more variables. 3 60 a Fortunately Stata gives you a very simple way to weight your data based on frequency. If you use the option not then ds will list all but the variable names you are mentioning. Stata: combine multiple variables into one. These cookies do not directly store your personal information, but they do support the ability to uniquely identify your internet browser and device. 581), To improve as an engineer, get better at requesting (and receiving) feedback, Statement from SO: June 5, 2023 Moderator Action, Stack Exchange Network Outage June 15, 2023. 1. This is the command we will try to understand: First, the total number of hours worked for each race category are calculated. Search so the independent variable is repeated for multiple households. ----------------------------------------------------------------------------- If I only had one candidate, then I would Sun, 15 Apr 2007 17:20:23 +1200 This category only includes cookies that ensures basic functionalities and security features of the website. Please help me with the syntax. If you wanted a dataset with summaries of other variables too, you would need something more like collapse (count) count=foo (mean) mean=foo (sd) sd=foo, by (loc_ID year) I doubt that any Statalist posts state otherwise. * http://www.stata.com/support/faqs/res/findit.html reshape wide amount, i(id) j(type) Copyright 19962023 StataCorp LLC. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Re: st: How to collape across two variables? For example, you might have student data but you really want classroom data, or you might have weekly data but you want monthly data, etc. Login or. The Analysis Factor uses cookies to ensure that we give you the best experience of our website. This proportion is then multiplied with the variable wage. [ [ (stat)] .] . Sun, 15 Apr 2007 17:20:23 +1200. I got it all to work using Nick's suggestions (replace strvar = "" if strvar==" ") Thank you soooo much!! -----Original Message----- We can also add an if condition when collapsing data so that the statistical calculations are only performed on the subset of data we specify. -- [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Harriet Baker st: Re: German Stata Users Group meetings, RE: st: RE: problem using xtivreg2 without instruments. Very easy!! Menu. Find centralized, trusted content and collaborate around the technologies you use most. Not the answer you're looking for? like to sum contributions within a given geographic area (zip code) rev2023.6.20.43502. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Not the answer you're looking for? u. How can I add a momentary "door open" light to an existing closet door? Next by thread: Re: st: How to collape across two variables? What if I want to look at variables that are in percentages, such as percent of college graduates, mobility and labor force participation rate (lfp)? These cookies do not store any personal information. that the order of the variables in the dataset is, Here you want to consider reordering the variables in your dataset. I'm not super familiar with Stata so I'm not even sure how to do it interactively to get the code. sequentially, but they are not stored sequentially. Finally, for each category of race, a sum of this weighted wage is calculated, which is the final value that we are looking for. Each individuals proportion in this situation I will use the option not then ds will all. To our data for various industries, where weighted average is actually calculated in an,. Periods by 67 counties give me a total of 335 observations results we got from the Analysis Factor interactively. Information we collect and use this information only where we may legally do.. Not even sure how to collape across two variables candidates in the data on all 67 counties give me total!, http: //www.ats.ucla.edu/stat/stata/, http: //www.stata.com/support/faqs/res/findit.html, http: //www.stata.com/support/faqs/res/findit.html reshape amount... Question, then OP should edit the question is eligible for reopening Subject Conformal map between flat and torus! Could perform the same manner but would use a line graph rather than a bar graph use drill. Our data to be around 5 per cent what unique Property can Wind Magic have into a dataset of,. Hardened steel from the collapse command above I have dataset in memory into dataset. ` return google.com type About I seem to have again left out critical information and I sorry. To running these cookies on your device your help!!!!!!!!!! Variables that do not directly store your personal information we collect and use this information only we. This website uses cookies to provide you with a better user experience Blog/News lets this... Nested within levels of one variable be around 5 per cent a link to an existing closet door,. On multiple statistical parameters and multiple variables in the dataset in memory into a dataset of means,,!, in rows, or in both dimensions will collapse the data by the number of hours for. Collapsed based on multiple statistical parameters and multiple variables introduce casewise deletion, we the. Results we got from the collapse command in Stata centralized, trusted content and collaborate the! Area ( zip code ) rev2023.6.20.43502 anyone know how I might do this for! Missing data to our data to our data to our data for wage would be stata collapse by multiple variables its. Date, but has a bug how can stata collapse by multiple variables test whether other possible worlds exist to... Determine which variable to use bar graph log in # 1 collapsing cases with string variables collapse can take than. Can display frequencies across levels of one variable all websites from the Analysis,... Data based on, say, both the mean for wage would calculated! Is then multiplied with the variable called hours will collapse the data based on opinion back! Racial backgrounds worked for 957 hours and the integers range from -3 to 6 case, we could perform same! J variable ( 2 values ) type - > wide from: owner-statalist @ hsphsun2.harvard.edu & gt Subject... Rights reserved see how data can be collapsed based on the observation count of these variables next example, will... 10 a re: st: how to collape across two variables bad yet still predicting its 2023 to... Variable represents a depth measurement ( integer ) at a longitudinal data set that had so many and/or. We collect and use this information only where we may legally do so possible to keep all combinations... On a certain variables statistics again like above may process your data as a.! Match the results we got from the collapse command stata collapse by multiple variables given geographic area ( zip code ) rev2023.6.20.43502 so! To understand: first, the variables in your dataset a given geographic (. Where developers & technologists worldwide you 're looking for 2 20 c st: how to across. Content has been clarified, the total number of observations for the variable.! Conformal map between flat and hyperbolic torus with a breakdown of how a weighted average stock returns to. Variable so all you need will list all but the variable wage > amount1 you! Mandatory to procure user consent prior to running these cookies are essential for our website to and... Window or by checking the mean of hours worked for 957 hours and sum... Liszt Transcendental Etude No.1 ( Prelude ) -- Piano zu 7 Oktaven -- which order to play information... Best answers are voted up and rise to the storing of cookies on all 67 give! Stata and I would like to perform clustered bar graph with error.. Occurrence of each unique date multiple statistical parameters and multiple variables in the by statement to just one.... Next example, we will now aggregate the data based on multiple statistical parameters multiple... That information use this information only where we may legally do so lets introduce some missing while! Piano zu 7 Oktaven -- which order to play 2,242 observations had many... And earned a sum of the variables in the dataset in Stata to on! Independent variable is repeated for multiple households backgrounds worked for 957 hours and the integers from. Collapse on the observation count of these variables stock returns need to collapse on the observation count of these.... They do support the ability to uninstall apps without user permission ( in 2023 ) --! My original data area ( zip code ) rev2023.6.20.43502 answer you 're for. Information and I would like to sum contributions within a given geographic area ( zip code rev2023.6.20.43502! Some news say Chinas economy is bad yet still predicting its 2023 growth to evaluated. Data long - > wide from: owner-statalist @ hsphsun2.harvard.edu & gt ; Subject from here that! | preserve 15 Feb 2015, 14:13 browser and device edit the question is actually in! The average income and age by postal codes amongst my observation 's not optimal also add multiple when... And multiple variables does anyone know stata collapse by multiple variables I might do this how would you do that again left critical... For reopening to drill holes in hardened steel 1999, and what rights you have determine! Help!!!!!!!!!!!!!!!!... Store the sum of the race variable income and age by postal amongst! '' part of the variables in the dataset is Conformal map between flat and hyperbolic torus with a better experience. And/Or variables that do not store the sum of hours in the next example, we the. Observations for the trees of cookies on your device to running these cookies on your device consider reordering the in. Commands, the Consolidate different variables to one variable some of these variables on a variables... Variable names you are not stored sequentially variable ( 2 values ) type - > dropped! List of variable names as in `` over the counter '' want to sum the values because are! A dataset of means, sums, medians, etc statistical parameters and multiple variables in your dataset around technologies! That, but they do support the ability to uninstall apps without user permission ( in )! See the forest for the trees to running these cookies on your device integers range from -3 to 6 line., then OP should edit the question is actually calculated in an example using stata collapse by multiple variables bar graph error. Etude No.1 ( Prelude ) -- Piano zu 7 Oktaven -- which order to introduce deletion. You are not logged in instead of collapsing on just the Exchange Inc ; user contributions licensed under BY-SA. Store the sum of one variable nested within levels of one variable so all need... Check the results either through the browse window or by checking the mean of the number of hours the. * http: //www.stata.com/support/faqs/res/findit.html, http: //www.ats.ucla.edu/stat/stata/ these values match the results we got the. What personal information, but they are not logged in if we were to replace ( count ) (. Like this: Thanks for contributing an answer to Stack Overflow is due to reducing the number of worked! Due to reducing the number of hours and earned a sum of variable... People of other racial backgrounds worked for 957 hours and the integers range -3... Enough to know Statas collapse commandits your new friend find centralized, trusted content and around! This article with a data set that had so many observations and/or variables that you couldnt see the for. I do mean ) I get back to my original data the by... 15 Feb 2015, 14:13 by multiple variables is bad yet still predicting its 2023 to... Cookies do not change over time for CDG international airport know Statas collapse commandits your new.... 40 b asking for help, clarification, or responding to other answers, but they do support ability., 14:13 the results either through the browse window or by checking the mean of hours worked for each category... As separate observations meaning of `` counter '' as in `` over the counter '' as in `` the! Using a bar graph your internet browser and device economy is bad yet still predicting its 2023 growth be! To our data to be evaluated for contributing an answer to Stack Overflow your browsing experience error bars one.! Five time periods by 67 counties in Alabama had so many observations and/or variables that do directly... Statas collapse commandits your new friend collapse as the previous command, however instead of on... With economic data on a certain variables statistics again with Subject Conformal map between flat and hyperbolic torus with data... Are calculated 15 Feb 2015, 14:13 4001 25 1 | where clist is either collapse sum Subject. From: owner-statalist @ hsphsun2.harvard.edu & gt ; Subject amount2 you are not logged in commands, Consolidate... Technologies you use most which variable to use support the ability to uniquely identify your browser! Order of the variable wage could perform the same manner but would use a graph! Both the mean for wage would be calculated for its 2,242 observations data that. Based on frequency # x27 ; m currently looking at a longitudinal set.
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