Collapse Format Stata, cases, codes, pyr, lvl and p). While append added observations to a master dataset, the general Use the advanced editing options to appropriately format quotes, data, code and Stata output. sysuse nlsw88. What I would like to do is collapse consecutive entries that represent an escalation of therapy (escalation_therapy_notvent == 1), which I would refer to as an "escalation episode" into a single Learn how to use the collapse command in Stata to summarize your data efficiently. I have a dataset with a lot of factor variables and I need to collapse it by region. The difference arise between "collapse X, by (Treatment SubjectID Period)" and Two of the trickest Stata commands that you will almost certainly finding yourself having to use if you're manipulating panel data! Specifically, I introduce viewers to some of the most powerful commands (i. With every other command with which I have used an if qualifier, the command The collapse command with the firstnm statistic will probably do what you want. In that case you need to first -encode- hospital and then substitute the encoded variable for hospital in the I have daily measurements which I wanted to collapse by two variables (area and group) by date. Stata Collapsing by first observation date when there are multiple date observations per ID Asked 9 years, 10 months ago Modified 9 years, 10 months ago Viewed 1k times I always get column vs. We will show an example on how to collapse our daily time series to a monthly time series by making use of a function of this Is there any direct way to save into a new variable the frequencies obtained by applying the command tabulate?. I have a data set with a lot of strings that I want to collapse, but it seems that in general collapse doesn't place nicely with strings, particularly (firstnm) and (count). On the other hand, coding one -collapse- The simplest of these, collapse, aggregates data into means, medians or other statistics for groups defined by one or more variables. collapse Collapse/generate mean for only some rows in long format? 09 Oct 2023, 12:43 Hi, I have repeated measures data on sleep times in long format. Stata has a great collection of date conversion functions for this type of tasks. Note: the -format- command is just to make the display of patid and clmid in the ouput listing show enough figures that you can see the differences among the different values of patid and clmid. Note: See [D] contract if you want to collapse to a We will illustrate this using an example showing how you can collapse data across kids to make family level data. Description collapse converts the dataset in memory into a dataset of means, sums, medians, etc. preserve If you don't know that a command like joinby does, then you type in Stata help joinby . clist must refer to numeric variables exclusively. this works a treat, however when i try to use if with an -if- it doesnt seem to work. collapse adds meaningful variable labels to the variables in this new dataset. Fortunately, several commands facilitate drastic restructuring of datasets. Depending on the collapse, it can be up to twice as fast than This guide discusses basic techniques to restructure data from long format to wide format and vice versa using Stata. The integer value of city I guess that it has something to do with the way Stata stores the data. Collapse is not the right approach for what you want to achieve. (It will display in scientific notation. While append added observations to a master dataset, the general The collapse command in Stata is used to aggregate a dataset by collapsing it based on some summary statistics of a variable. Note Stata 17+, MP version, introduced significant speed improvements to the native collapse command, specially with many cores. The simplest of these, collapse, aggregates data into means, The merge command combines the dataset in memory, known as the master dataset, with a dataset on disk, known as the using dataset. This tutorial covers the basics of collapsing datasets by mean, sum, count, and more. This The resulting dataset also looks identical to the one produced by the collapse-command. Just -collapse- because it has to figure out what you want it to do before doing it, and some additional overhead, is slower in execution than the -egen- approach. So while The simplest of these, collapse, aggregates data into means, medians or other statistics for groups defined by one or more variables. I have some large files that I am collapsing - a thousand variables and several million rows. Before performing collapse my dates were not in date format. (i. For illustration, we return stata. I identify the exporting firm, the destination country, the date for the FYI: the data was stored originally in SAS data format and I used Stat transfer 13 to convert it to . Sorry Nick. Collapse works now. The advanced options can be toggled on/off using the A button in the top right corner of the text editor. Commands in the video: . In the creators’ I have a dataset that looks like : Table 1 I want to collapse the data in Stata such that the data appears as : Table 2 I am aware that if Product were a numeric variable we could use the colla I am trying to create a loop in Stata so that I can add multiple variables for creating mean_var and median_var. Basically my data looks 26. I need to calculate the weighted average of a set of observations by year and count as astatistic in collapse counts non-missing values and only applies to numeric variables. These examples take wide data files and reshape them into long form. , append, merge and collapse including recoding) for data management in stata. row percentages backwards, but I am trying to calculate row percentages (I think) and when I am collapsing (see code below) it gives me column percentages (I think). Even if string variables were allowed, it would not be what you want, e. The application is helpful in collapsing stock data across mutual funds or products across firms. Since I'm working with a dynamic panel model (GMM) I need to collapse all my data into 5 The merge command combines the dataset in memory, known as the master dataset, with a dataset on disk, known as the using dataset. Johns Hopkins collected this data at the county level in The collapse command allows you to split the frequencies by any number of different variables (all in one go) but it doesn't allow you to retain the total, unless you hack or append. 5. I'm using panel data. Essentially my problem looks like the first table and I am trying to collapse it to get an output like the Collapse Command, Complex Survey Design, and Difference-in-Differences Estimations 27 Sep 2018, 15:13 Dear all, I am using the Behavioral Risk Factor and Surveillance System Data (BRFSS) from Hello! I am trying to export the dataset after collapsing. collapse adminratio fundratio (median) medadmin=adminratio medfund=fundratio, by (portfolio) cw But then how do I incorporate basing this on the top 20% and bottom 20% of another variable? How can I create a dataset (matrix) of means (other stats) of variables from the current dataset? I understand I can create a variable list and use the collapse command on the variable list, but only if just one statistic is required, however I do need two. The dataset contains a dummy variable that is 1 when I have a transaction level dataset and I want to collapse and calculate weekly average price. 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 collapse takes the dataset in memory and creates a new dataset containing summary statistics of the original data. I would then have: 50 states * 10 years = 500 observations). dta, Issues Collapsing Data 02 Jul 2017, 11:26 Hi, I'm using STATA 14. Stata v. That is also the original format before the collapse. ) collapsing multiple observation into 1 observation 29 Apr 2017, 03:06 Dear all, As you can see in Dataset1, I have 4 different variables (i. Another approach is using Collapse has a list of options, taking e. However, there are small differences visible if one looks at the decimal places far out. Stata command collapse can create a new data set that contains the summary statistics of the original variables. Collapse allows you to convert your current data set to a much smaller data set of means, medians, maximums, minimums, count or percentiles These two packages contain common Stata commands (such as merge, collapse or isid), but they have been programmed more efficiently and perform faster than the original functions. 2 Converting continuous variables to categorical variables Suppose that you wish to categorize persons into four groups on the basis of their age. By default it creates the collapsed variables in the format double %10. For example, you can take a dataset of individual level data and collapse it into mean statistics by state. separate helped me quickly create the area variables, but I'm still stuck on collapsing by id from long to wide if, for example, there are two science courses. , the mean or sum or first non-missing value of observations, by some grouping variable. collapse (mean) DHSCLUST-time_var , by (id) type mismatch I Hi, I'm a Stata newb and was hoping to get some help. The collapse command takes all the observations I have US daily confirmed deaths and cases from the coronavirus pandemic that I need to collapse for use in another dataset. Don't forget that the pdf manual contains more detailed information than the helpfile, so if you don't understand the Dear Statalist, I have a dataset containing firm-level export data collected from cutoms data, eg. I want to create tables with the 'country' category in the row and various categorical variables ( gender education age employment) in I think that the Stata documentation of COLLAPSE, excellent though it is, does not go far enough. You want a variable to denote whether a person is I hope all is well with you. Additionally, I'd like to get the mean, p5, and p95 when I collapse, but I Hi everyone, I'm having some doubts on the usage of the -collapse- command and I'm hoping you could help me on this. I'm trying to collapse only a subset of my data using if, but it seems to be dropping / collapsing much more than I expect. This video shows you how to collapse data in Stata. As an aside, you don't need to invoke -distinct- in that second I followed the collapse command as suggested in the manual and I believe this shoudl work. Collapsing the data now even further using "collapse X, by (Treatment SubjectID)" now yields a different mean than before. 0g . com collapse takes the dataset in memory and creates a new dataset containing summary statistics of the original data. The dataset can be simplified as follows, clear input str9 date quantity price id "01jan2010" 50 70 1 " Get to know Stata’s collapse command–it’s your new friend. 12e- after the -collapse- you will be able to see that all the significant figures are there. 15. 1. In case if it helps, the following loop also recognizes and displays the variables labels Learn how to collapse Stata variables into means, medians, and percentiles sorted on a categorical variable. I am not sure how to export the collapsed table into a tex file. However, this data isn't creating any variables; the collapsed_file is the same as my Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. g. In this blog post, I will show you how to use the collapse command in Stata to create a new dataset that contains summary statistics of your original data. g each line represent one trade. it runs but has no effect on the collapsed dataset. My code is as follows : collapse (mean) pop mort surv, by (countryname). Here is a file containing information about the kids in three families. Are the values wrong or is it just in an undesirable format? Collapse does not need you to specify all the variables in your data-set so this is not the reason for collapse "failing". For example, the normal by (x) option at the end of Hi I have number of variables in Stata and I want to collapse in Stata using mean statistics. The twoway suite, which is the most commonly used tool, allows a collapse: makes a dataset of summary data statistics. I'd demonstrate it on your data, but my copy of Stata won't import data from a picture. I would like to put the different collapsing by multiple variables/matrix 20 Apr 2015, 13:45 Hello all, What I'd like to do is collapse (sum) and collapse (mean) within overlapping groups. Survey or public opinion data in raw format comes at the individual respondent level. This is much liking creating statistics for groups of cases, but by collapsing your data a new data set is The collapse command in Stata is used to aggregate a dataset by collapsing it based on some summary statistics of a variable like mean, sum, median, collapse is a very flexible command to show information from complicated data structures, in a simple way. Any help The graph command suite creates pre-packaged visualizations, typically based on Stata's native collapse syntax and statistics. 2 (apologies in advance as I am using stata on a university server and cannot use dataex on the university version) Below is an example of I'm trying to optimize some data analysis in Stata 19. Objective: I would like to collapse this individual level data to the state level while keeping years separate. it could be improved by discussing this issue and providing a fix for situations where missing values hello, I am trying to tally and collapse a number of variables. the count of non-missing values in I want to call the variables from the local varlist for (mean) in collapse, but couldn't so used totasset-totveh (which I want to avoid as this includes additional variables. I would like to convert those factor variables into several dummies and ask stata to calculate its mean when collapsing the See help missing in Stata for a very useful discussion of working with missing values in Stata that explains why that works. I have a question about "collapse". collapse adds meaningful variable labels to Hi all, I have a dataset with indiviudal-level data that I would like to collapse into household-level data. Dear all, I have data which I would like to collapse but I am finding it difficult to treat my string variables in the collapse command. collapse adds meaningful variable labels to the variables in this new Dear Stata Users; I'm having some troubles with the collapse command. These show common But if all the variables you need to create are summary statistics, the collapse command can do the entire process for you quickly and easily. dta. This module illustrates the power (and simplicity) of Stata in its ability to reshape data files. Collapse Collapsing your data means to combine several cases into single lines. Collapsing your data means to combine several cases into single lines. Note that collapse works by replacing your data with the summary statistics of each If it really can't be correct, then, again, the problem is with how non was created--there is nothing wrong with the code you show in #1. The default option is the mean. This is much liking creating statistics for groups of cases, but by collapsing your data a new data set is created that Conclusion ¶ collapse is a very flexible command to show information from complicated data structures, in a simple way. We could also take averages for each region and show it with bar charts. I included the code as good practice - I don't ever want to accidentally turn Note added: If hospital is a string variable, -collapse- will object that there is a type mismatch. However, the number of observations does not change that I believe should after collapse from daily to monthly I'm looking to collapse my dataset across all variables across reps (so I would end up with one estimate per year for each scenario). Is there a way to avoid typing out all variables? Use the advanced editing options to appropriately format quotes, data, code and Stata output. You will need to convert the data from wide to long format and then tabulate to get the desired output. In Stata, typically each response variable corresponds to a particular What does the collapse command do in Stata? collapse takes the dataset in memory and creates a new dataset containing summary statistics of the original data. e. For illustration, we return to the data on monthly global Welcome to Statalist. I need to generate a baseline mean of the variable Thanks for your quick reply. One approach that comes to mind is using the egen command rather than collapse to generate the variables you need within the existing dataset. As I am not versed in programming skills, I used awkward code of keeping each category of intended Hello, I have the following code: preserve separate income, by (gender) collapse (median) income1 income2 income3 [weight=weight], by (year education) I have this database of teachers and schools of about 62,000 observations, and I'm asked to use the collapse command to count how many schools and how many teachers there are, but when I Changing nothing in the data itself, if you -format pm10 %20. In general, changing a display format never changes values and indeed a numeric format Collapsing You can use collapse when you want to create summary statistics of your data, or some of your variables. This script provides an introduction to Stata Aggregating data with collapse Sometimes, we do not only want to calculate certain statistics for different samples of the dataset, but aggregate observations The "must" may seem too imperious, but avoiding this just will make your life with dates in Stata more difficult. aye1, rrxuu, otwxbj, twazc, 9ykmo, q7nip, ii4nx, 0jkrd, uywazo, 6bgn,