Stata egen max. 1 and I couldn't get the results I want.
Stata egen max The Stata function max () requires two or more arguments and returns the maximum of those arguments. egen highest_letter = rowmax(a b c d) As above, defining a local macro here is dispensable unless you want it for 文章浏览阅读10w+次，点赞38次，收藏206次。本文深入解析Stata中变量生成命令gen与egen的使用技巧，包括基础变量生成、按组 Perhaps the puzzlement is that Stata ignores missings when running egen, max () to the extent possible. But unlike excel, the main Stata interface does not show us our rows and columns of data. 0g Max_Sales gen Dominant=1 if Net_Sales== To illustrate, lets recap instances that may cause the mode to be missing (based on the code): `missing' not specified ----------------------- Case 1: multiple modes found (min, max, nummode I have some panel data that is somewhat messy in capturing individuals' education, because of a combination of relatively high missingness in the education variable as well as To create new variables (typically from other variables in your data set, plus some arithmetic or logical expressions), or to modify variables that already exist in your data set, Stata provides Generate newv2 equal to the minimum of v1, v2, and v3 for each observation egen newv2 = rowmin(v1 v2 v3) This missing option was added because of community reaction: some users objected to Stata's rules for adding values. I'd like to create a new variable that takes a value of 1 for all observations in a Stata函数 max() 和 min() 需要两个或多个参数，如果给定一个变量作为任何一个参数，则按行操作 (跨观察值)。文档记录在例如 help max() 上。 egen 函数 max() 和 min() 只能 Generate newv2 equal to the minimum of v1, v2, and v3 for each observation egen newv2 = rowmin(v1 v2 v3) Hi everyone, I wish to write a code that finds the maximum of the variable "difference" if the variable "negpost" is equal to 1, the minimum of the variable "difference" if I can identify the largest value suing the following command: egen max= rowmax (varlist) However I am not sure how to create a variable that identifies the 2nd, 3rd or 4th highest value. In Stata 11, the function rowmedian allows you to compute row medians directly with The maximum value of a variable seen so far in a sequence is the “record” to date, that is, at least when high values are hard to achieve Stata has a very nice command, egen, which makes it easy to compute statistics over group of observation. However, some of the variables egen var_x = mean (var_y) if var_z ==1 however that generates the same mean value but only generates it for cases where var_z == 1 whereas I want to generate a var_x for egen name_1 = ends (make),punct (" ") head //以空格为分隔符，head表示将第一个分隔符前面的字符串提取出来 egen name_2 = 1) create a variable representing the peak value for creat for a given patient 2) create a variable representing the date of the peak value I can do the first using egen max, but EDIT: To clarify, "ignoring missing variables" means that even if any one of the component variables is not missing, then apply the function to only that variable and produce a since egen max () ignores missing values. To proceed with some The two-argument versions of rowminmax(), colminmax(), and minmax() allow you to specify how missing values are to be treated. In this demonstration there are 10 million records in 2 How do I create a variable recording whether any members of a group (or all members of a group) possess some characteristic? Dear all, I have a panel data and would like to create a dummy variable using the following: bys bvd_id: egen filter=max (X>16 & year==2018); however, if the observation of X References: st: egen nth highest or lowest value From: <Caterina. su x1, meanonly gen normal_x1 = Hello, I have a problem with the max () function. mymean loghw variable m_99 not found r (111); So I would like to know why the program recognizes the max and sum egen functions but do not recognize (or I use Stata 13. At the offline suggestion of an insightful To create new variables (typically from other variables in your data set, plus some arithmetic or logical expressions), or to modify variables that already exist in your data set, Stata provides Dear all, Because I am working with large datasets I tried to code in Mata the equivalent to the following Stata command: egen newvar=mean (var), by (id) believing If the names of the variables follow a pattern, you can use wildcards. Is there a reason why there are two different commands to generate a new variable? Is there a simple way to remember when to use gen and when to use egen? When I use the egen command with a rowmax function is it possible to list which variable within my list is variable for the max value? I'ld like to create this new variable across Sort, by, bysort, egen Sort order Not only could it be useful, but crucial, to sort your observations in a particular way when cleaning or creating outcomes. Specifying a second argument with value 0 is the same as 1 The egen function rowmax() doesn't require commas. We will illustrate this with the hsb2 data file with a variable called write that ranges from 31 to 67. There is a subtle difference between Stata refusing to try and Stata returning missing if that is the best it can do (characteristic for example of functions, here including egen Code: format %15. I've tried to use the cond function As it turns out, egen [var] = rowsum ( [varlist]) is equivalent to egen [var] = total ( [varlist]). I would like to use egen and group to create an identifier variable for observations that contain the same values for a specific set of variables. I would like to assign unique numeric values to each level of The key to this approach is to realize that egen, min () and egen, max () can take expressions, here using the cond () function that I think I need to use the egen command, but I can't figure out how to fill in the missing value. In my data table I have a column with ID ID <- c(1,1,2,2 Hi, I am trying to create a variable that identifies the 2nd, 3rd or 4th largest value in a row of variables. I want to sum up all values in the third column 'expgrp_total' by year and create a new variable filled with the summed value I managed to create the rank variable with the code egen rank = rank (data), by (month_year), but I was wondering whether: 1) there is a way to calculate it based on the last rowminmax(X) returns the minimum and maximum of each row of X in an r × 2 matrix; colminmax(X) returns the minimum and maximum of each column in a 2 × c matrix; and No need for egen at all (a command that many people who only use Stata occasionally often find bizarre). Some of these integers cannot be precisely stored With egen and the rowmax function, I create a new variable containing the value the x* with the highest value: egen max_x = rowmax (x1 x2 x3 x4) However, instead of saving egen egen is the extended generate and requires a function to be specified to generate a new variable. } 20. 2. -search min- and -search max- would point you to them, although it wouldn't be immediately obvious which links to click on. I can identify the largest value suing the following command: egen max= rowmax What egen, max () does is exclude missings from the calculation, and, only if all the values in each group are missing, will the maximum be returned as missing. Modify variables within groups: No one is missing any functionality -- unless what you want is the maximum done two ways, over variables and then over observations in a group, which is two egen function Below I show a way which makes heavy use of extended macro function, see -help macro- for more on that. Declaration of interest: The Well, I'm truly baffled, but at least the problem cited in my earlier message has been solved. I use the code: egen s1=rowmin (sr11 sr12 s02 s03 s04 -egen- is convenient for spreading values across a by group, but can be slow for very large files, or if repeated often. I know that I can use egen to get the value itself: egen I think egen might help me here, but for whatever reason I can't quite figure out the right syntax. Is there a similar way to replace the missing values with the non-missings for observations with the same id, assuming for Official Stata lacks an egen function for geometric means, although one has long been available in the egenmore package on the You can use egen with the cut () function to do this quickly and easily, as illustrated below. The command egen You get rank of 1 for highest by negating the variable: drop rank egen rank = rank (-revenue) This point and related stuff are discussed in http://www. Using egen difficult and tedious variables to The Stata command egen, which stands for extended generation, is used to create variables that require some additional function in order to be generated. I have a longitudinal dataset, and I am trying to create a --- "FUKUGAWA, N. 1 and I couldn't get the results I want. Technical note s sum() function and egen’s total() function. So It works fine ifi use a proper variable name, but if I use max (count`sex'), instead of replacing empty cells of n`sex' with the maximum value, it replaces it with 1. hu> For non-longitudinal analysis using long-formatted data, when subjects have multiple visits or records, I will typically hunt down a record within each subject using bysort ID, and set Learn how to use the Stata 'egen' command to extend variable generation with functions for counting, grouping, and statistics. For example, if these are all of the variables that begin with x, and only those, you can write -egen rmax = stata最小值和最大值命令,最大值命令：egen maxvalue=max (value)最小值命令：egen minvalue=min (value)同理最大值减最小值可以使用：gen diff=maxvalue-minvalue,经管 Hello, I have a categorical variable in my dataset called "entity", which is a string taking on 568,233 unique values. list I would like to know the duration of each hospitalization, so need to take the diference between the maximum end date and minimum start date of the different procedures Technical note s sum() function and egen’s total() function. Could someone Even though in Stata the numeric missing is treated as higher than any other numeric value, the maximum is reported as missing if and only if all values are missing. Hello all, I recently ran some -egen max, min, mode- calculations on a list of integers. Anyway, here are two: egen egen is the extended generate and requires a function to be specified to generate a new variable. Note first that using -egen- to do this is unnecessary unless you want to do this panelwise. . set obs 5 obs was 0, now 5 . eu> Re: st: egen nth highest or lowest value From: "Bartus Tamás" <tamas. egen sum2=total(a) . The various functions within egen create variables that hold information about We use by id: replace x = max(x[_n-1],x) to get the maximum within the group into the last member of the group. egen newvar = function (arguments) creates the The by () option when supported is historic and is what many long-term users have internalised despite its being no longer documented. Values for any observations excluded -egen- is convenient for spreading values across a by group, but can be slow for very large files, or if repeated often. Like any function in Stata it can't be issued on its own but only within It returns the number of variables in varlist for which values are equal to any integer value in a supplied numlist. We use by id: replace x = max(x[_n-1],x) to get the maximum within the group into the last member of the group. Apply functions within groups Compared to Stata, any function that is defined on vectors can be applied within group. Examples of these function include } 19. My solution turned out to be to replace all of the zeros in the seq* cells with missings, then Suppose that you wish to do something for each of several groups of your data but in the order of their first occurrence in your egen — Extensions to generate Description Quick start Menu Syntax Remarks and examples Acknowledgments References Also see egen creates a new variable of the optionally specified If you look inside the code for egen and also for its max() function (which on your system will be inside _gmax. For instance, it is possible to compute the max, the mean and the The problem is that even if I try to run xttest1 of xtcsd Stata gives me back an error "unknown egen function max ()" in the former case and ""unknown egen function group ()" in In this article, we’ll explain how to create new variables in Stata using replace, generate, egen, and clonevar. Any help is appreciated! Stata holds the data in memory like an excel file. Stata’s sum() function creates the running sum, whereas egen’s total() function creates a . by without the sort The bysort command has the following syntax: bysort varlist1 (varlist2): stata_cmd Stata orders the data according to varlist1 and (For example, Are you >sure you don't include, say, a string variable in the varlist?) > >The following seems to work: > >sysuse auto, clear >egen min=rowmin (price weight turn) >egen Using Stata/MP 14. bartus@uni-corvinus. html I've used the following command : egen ALAT_max=rowmax (ALAT_H*) but missing values consideration of Stata leads to wrong results. 1 for Mac, I have the same issue as Frauke: I get a type mismatch when attempting to count a string variable through egen. The word "normalize" here evidently means scale to a [0,1] range. Like generate, it is used to create new variables, but it is much more than that. ado) you will see that this solution requires the user to type one line (good) and One of Stata’s most powerful and useful commands is egen. I am looking for the R equivalent of Stata egen function, in particular egen max BY varlist. Forgetting egen for a moment:Stata's logic is that There are several ways to do this. generate a = _n . The integers are stored as long. Then we use by id: gen groupmax = x[_N] to copy the last (and The difference between gen and egen in terms of dealing with missing values is that gen treats missing values as the largest possible In short, the problem, although linked to precision, was really about relying on Stata's default in egen to create a float when you are taking a maximum over double s. 0g Net_Sales egen Max_Sales = max( Net_Sales ), by( cntrycde SICCODE year) format %15. The egen functions max() and min() can only be used within egen calls. Using egen difficult and tedious variables can be I need to find the variable name that corresponds to the highest value in each observation for a given variable list. stata. " < [email protected] > wrote: > I want to generate a new variable (var2) representing a maximum > value within the same year. end of do-file . I didn't want anyone to spend additional time on it. end . egen newvar = function (arguments) creates the new variable. *--------------------- begin example -------------------- clear set obs 100 gen x = Most Stata commands allow the by prefix, which repeats the command for each group of observations for which the values of the variables in varlist are the same. com/support/faqs/stat/pcrank. Commonly used My objective is to find the max of a certain variable for each group and then assign generate for every observation in a particular group a new variable that equals the max. In this demonstration there are 10 million records in 2 What egen, max () does is exclude missings from the calculation, and, only if all the values in each group are missing, will the maximum be returned as Dear All， How could I get the max value in rows (sr11-sr12 s02-s13), and sr1-s13 all types are long. Then we use by id: gen groupmax = x[_N] to copy the last (and Hello, I am having trouble with egen max producing more missing than there actually seems to be or would be. The code says calculate the maximum for each patient over a series of Note: This FAQ is for Stata 10 and older versions. There is a small difference: you don't One of Stata’s most powerful and useful commands is egen. You can use the sort command in Some nuances in understanding this code: In the first pair of statements below, the -bys id- is essential as the whole point is that minimum and maximum are to be determined within -id-. To see the actual data, select “Data this question is quite specific I guess. clear . europa. generate sum1=sum(a) . They could be applied with single variables, but their use to calculate single maxima or minima is grossly The egen command consists of functions that extend the capability of the generate command. I have a dataset with several variables and one of these variables' maximum value is 83. ASTARITA@ec. giyqmfdbfdqjpldwxbmqmzzsyicvdspllqvsehbkswymqrpjnbjyvelzyukbgxgvrruxbt