Gen byte stata byte, int, and long are said to be of integer type in that they can hold only integers. How can I tell stata: "look if there is an answer (no matter which) and count. 80 3. generate — Create or change contents of variable在Stata中一提到新建变量，用的最多的就是generate命令（新建变量）与其黄金搭档replace命令（修 ,Stata 新建变量命令之generate：新建变量,公卫人 type指变量的存储类型（如byte，int，long ，float，double，str），留空（不指定 [U] 16 Do-files5 Example 2 In the following fragment of a do-file, we temporarily change the end-of-line delimiter: fragment of example. See help fvvarlist, and check out the information on the binary operator #. Also, an outlier being at least 1. Trong Stata, bạn có thể tạo các biến mới bằng lệnh generate và bạn có thể sửa đổi các giá trị của một biến hiện có bằng lệnh replace hoặc recode. 6) } local value_of_interest 1 From Maarten buis < [email protected] > To [email protected], [email protected] Subject Re: st: Find variable with first occurrence of a value in a list of variables: Date Tue, 13 Jul 2010 14:23:42 +0000 (GMT) Phần này chỉ ra cách tạo và mã hóa lại các biến. gen byte first = time == firsttime . egen nb = group(b) which will generate a numeric variable nb that does not have value labels. 1 Convertingcontinuousvariablestoindicatorvariables 26. -extremes- allows you to set your own multiplier. do use mydata I am using Stata 13. Let’s use the auto data for our examples. split x, parse(; ：) destring variables born as string: x1 x2 x3 x4 x5 x6 x7 x8 x1: contains nonnumeric characters; no replace x2: all characters numeric; replaced as byte x3: contains nonnumeric characters; no replace x4: all characters numeric; replaced as byte x5: contains nonnumeric characters; no replace x6: all characters numeric; replaced as byte x7: generate(newvar) specifies the names of the variables that will contain the transformed variables. 414×10−16. list make foreign make foreign 1. ) when year is not equal to 1960. , generate() label() to get a numeric variable for xtset. Please let me know whether it makes sense or not. g. do ----- set more off set mem 500m log using speed. FIrst, you can use encode . The variables may contain numeric values, but if they are defined as type string, there are very few things you can do to analyze the data. Basically I am trying to translate a SAS clean procedure into Stata. 5+x)) gen byte one = 1 probit y i. If a gen command has an if condition, the resulting variable will (and must) still exist for all observations. x * get the matrices that apply the linear constraints matcproc T a C matrix list T matrix list a matrix list C mata: // evaluator is not changed to a reference panel. In this section generate creates a new variable. For a specific example, see below where I create a 100 row dataset with variables y, x1, x2, and gender, the last of which should be similar to yours (i. 1 Description Expanding this a bit: There is more than one way to do this, which should be fine by everybody. In the above cases (marked in red), the Dummy variabe should be 1 and not zero because 'MA_var' is NOT 0 AND there is at least one non-missing date for 'Date2' in the last seven days (i. year. for the variables. It is swept away by the next -ereturn - command, so make it permanent by typing -gen byte used=e(sample)- which allows you to condition on -if used- for any subsequent analysis * Example generated by -dataex-. list female sex in 1/4 female sex 1. clear set obs 100 set seed 123 gen byte gender = runiform()<0. The values of the variable are specified by = exp . Chev 即使我们没有在generate语句中指定存储类型，Stata也知道要创建一个 str9 lastname 变量，因为最长的姓氏是Bimslager，它有9个字符。 例子3 我们希望创建一个新变量age2，它表示变量年龄的平方。 . 0 g lungcapacity float % 9. 5Reference Please read [U] 12 Data before reading this entry. 5 percentile and then use gen command to create my dummy variables, however I am required to use a more efficient way. 2) From -help data types-: "Numbers are stored as byte, int, long, float, or double, with the default being float. 795×10−8. 5) return list local i = 1 foreach n of numlist 0. into() is a synonym for generate(). Because Stata is an interactive system, we force a distinction between replacing existing values and generating new ones so that you do not accidentally replace valuable data while thinking that you are creating For more information on this, in Stata type help makecns. gen byte last = time == lasttime A tacit assumption here is that time takes distinct values within each panel, which seems likely and is essential if tsset is to be applied. That stipulation limits the use of levelsof or egen, group(), which ignore current sort order. 0 g remission byte % 10. " 3) You can create integer types, specifying so with the -gen- command: 生成 虚拟变量 的通用方式为“ gen + replace ”命令，这两个命令的组合几乎可以生成所有需要的虚拟变量（具体使用见本文“一、基础命令”）。 只是由于书写命令的复杂程度会有所不同，因此在这个命令之外本文会针对不同的场景介绍其他几个更为简洁的生成虚拟变量的方式（见本文第二、三 Storagetype Minimum Maximum withoutbeing0 Bytes byte −127 100 ±1 1 int −32,767 32,740 ±1 2 long −2,147,483,647 2,147,483,620 ±1 4 float −1. I am not recommending using 23422, as anyone reading the code later then has to puzzle out what that means. I was looking for a built-in solution, but not finding something, came up with a "roll your own" solution that seems less than ideal, and so am seeking suggestions // Example data: For each case, find first occurrence of a "1" in a list of five variables. The key problem is to identify the last row containing a nonmissing value. Also, how is this treating missing variables? Any help would be appreciated. Create New, or Modify Existing, Variables: Commands generate/replace and egen. A little thought shows that as far as Stata is concerned, this is exactly the same kind of question. male male 4. 2Categorical string variables 23. VW Rabbit foreign 2. 3 . 3Mistaken string variables 23. 5) gen byte y = rbinomial(1,normal(-0. You can do anything with replace that you can do with generate. by year (basepanel), sort: gen invest_index = 100 * invest/invest[1] The same caveat applies if there are gaps in the data. For simplicity in output I've reversed the problem to finding the last row id with a missing value in a column. Reference is made below to various community-contributed programs on SSC or in the Stata Journal (SJ) or the Stata Technical Bulletin (STB). , be equal to 0 if age_at_visit is missing); if that is not what you want, and 23 Working with strings Contents 23. Take a look at the following code. 2 Creating Variables with If Conditions. previous 6 days and the day when the 'MA_var' is not 0) I'm looking for a relatively easy way to find, for each observation, which variable in a list has the first occurrence of a particular value. I was looking for a built-in solution, but not finding something, came up with a "roll your own" solution that seems less than ideal, and so am seeking suggestions // Example data: For each case, find first occurrence of a "1" in a list of five variables. bysort block (seqn): l seqn arm where seqn is the assignment order within each block. The only thing that deserves comment is the opening generate. From Steve Samuels < [email protected] > To [email protected] Subject Re: st: RE: Stata list example - use of the margins command: Date Fri, 9 Dec 2011 12:38:58 -0500 From Steve Samuels < [email protected] > To [email protected] Subject Re: st: RE: Stata list example - use of the margins command: Date Fri, 9 Dec 2011 12:38:58 -0500 STATA 通常把变量 Dataset has changed since last saved. 9884656743×10307 ±10−323 8 Precisionforfloatis3. 1. recast double a . 1415926535898 egen—Extensionstogenerate Description Quickstart Menu Syntax Remarksandexamples Acknowledgments References Alsosee Description 26Workingwithcategoricaldataandfactorvariables Contents 26. 4 Stata uses these five types for the storage of data. That was Andrew Castro's hypothesis about what characterizes mistyped entries. the other variables contain open string answers and I 在stata中的数据类型为byte。 我现在想生成一个虚拟变量，让前4个为1，剩余5个为0 我用gen dummy = inlist(z, "")显示type mismatch；用gen dummy=0，之后replace，stata也是显示type mismatch。 stata显示如下： generate and replace are used to create new variables and to modify the contents of existing vari-ables, respectively. generate byte quantile_group = 1 . Tính toán các biến mới bằng cách sử dụng generate và The next Speaking Stata column (Stata Journal 11(2), 2011) covers precisely this topic, and much more in the same territory. 4Complex strings 23. 1 Continuous,categorical,andindicatorvariables 26. by id: generate t1 = stime if _n==_N . set obs 10 forval i = 1/5 { gen byte x`i' = (runiform() > 0. Pat generate parentfigure=. generate byte cond7 = CONDITION1 & CONDITION2 . gen byte one = 1 . ) for its sales at time (t) it takes a value of 0 and at (t+1) if it enters to a country in other words has a value for its sales it takes a value of 1. 0 g mobility byte % 8. The dataset attached is malformed for Stata purposes as metadata appear in the first observation 👉 Next, familiarize yourself with Stata’s data types and declare them correctly when creating new variables:. Is there a way to do this in Stata? . Naturally, you would need to add a variable label, and then reorder, drop the old variable and rename the new variable, if you wish. If that is the case, then you can use . gen byte basepanel = 1 if company == 1. I want to generate a variable x including several conditions. 23. 1 like; Comment. com encode — Encode string into numeric and vice versa DescriptionQuick startMenuSyntax Options for encodeOptions for decodeRemarks and examplesReference Also see Description encode creates a new variable named newvar based on the string variable varname, creating, adding `gen()`是Stata中的一个命令，用于创建新变量并为其赋值。`gen()`命令的语法通常如下： ``` gen newvarname = expression ``` 其中，`newvarname`是新变量的名称，`expression`是一个用来计算新变量值的表达式。 <> It is not a command as such, rather a function: -e(sample)- If you type -eret li- after estimation, you can see it at the bottom of the resulting output. gen double p = 3. 70 . 字串變數則是存成 str<n> 的形式，其中 <n> 是字串變數的長度（幾 byte），比如說 ”neko”可以存成 str4，但無法存成 str3 gen byte pre_hepb3_compliant=inrange(age_at_visit,176,570) & pre_hepb_3=="Y" this will give you a 0/1 variable for each observation; note, however, that this assumes that either there are no missing data or that you want missing to fulfill/fail your conditions (e. We (wisely) told Stata to generate the new variable agecat as a byte, thus conserving memory. generate— Create or change contents of variable 3 When we use replace, we are informed of the number of actual changes made to the dataset. egen vartot = rowtotal(var1-var10) > > . Hello William, I am testing different ways to merge two datasets, when I use joinby there are a duplicate of data, when I use merge by two variables I receive a message saying: variables country year do not uniquely identify observations in the using data, and I dont know what does it mean. // Generate some data clear set obs 1800 generate byte cleanwater = _n > 190 generate byte nextquest = mod(_n,4) + 1 if cleanwater tabulate cleanwater tabulate nextquest // Use -tabulate- with the missing option tabulate nextquest, missing // Alternativey, install Ben Jann's -fre- command. When you generate a variable and the expression evaluates to a string, Stata creates a string variable with a storage type as long as necessary, and no longer than that. d Contains data obs: 1 vars: 2 size: 16 ----- storage display value variable name type format label variable label ----- a double %10. 0g ----- Sorted by: Note Generate/replace string variables 05 Jun 2015, 21:24. generate(newvarlist) specifies that a new variable be created for each variable in varlist. 1. To install: ssc install dataex clear input byte v1 int v2 byte v3 str1 v4 byte v5 float v6 str1 v7 double(v8 v9) float v10 11 10 11 "D" 19 . 0g b double %10. txt, text replace // get data sysuse auto, clear keep rep78 price keep if !missing(rep78) expand 100000 timer clear timer on 1 ftabstat price if _n==1 // kludge to load the plugin timer off 1 timer list 1 timer clear 1 preserve And even though things can be done in Stata it might be good to see how things can be done in Mata. Have a good weekend, Sergiy Radyakin // Benchmark program speed. replace a=32741 variable a was byte now long (1 real change made) . e. Numerical%fmt Description Example right-justified You would need to copy the data into a new variable, as below. Olds 98 domestic 3. We are using Math工房では統計ソフトStata generateコマンドのダイアログに見られるように、データの格納形式には複数の種類があります。 今、データの形式を数値データに限ることにすれば、選択肢は次のとおりです。 byte 1バイト単位のデータ gen byte black = race==2 这里，我们生成新变量black，并令其类型为type。 在利用stata对面板数据进行分析之前，我们通常需要对截 面变量和时间变量进行定义。只有定义之后，我们才可以 使用相关的面板数据分析命令以及各种时间序列算子。 gen byte bad = 0 // 事先指明变量类型是个不错的习惯 *****stata面板数据如何生成一个新变量使其等于另一个变量某一年固定年份的值 7. I am currently working on my thesis topic " poverty and consumption inequality". gen byte x = 12 . 1 Stata provides two IEEE 754-2008 floating-point types: float and double. replace var2 = 'Y' if cond7 In Stata, the equivalent of your nesting example would be, in addition to the statements above, . You can explicitly specify the storage type of I've looked through the help command, Stata forum, and online PDF instructions. . For males (1) and females (0) the range is different. Hello STATA Experts: I am trying to create a new variable based on the existence of certain conditions in two existing variables (see code below). gen double b=1 . 3 phần chính sau sẽ được đề cập trong bài viết này: . > > gen byte touse = abs(var) <= 1e6 > reg y var x gen edate=mdy(mo,day,year) // all vars must be numeric format edate %d drop datetext day month year mo l, noo sepby(id) *identify first occurrence (by date) of each id, method 1 sort edate bys id: gen byte firstid=_n==1 l id edate firstid, noo sepby(id) *identify first occurrence (by date) of each id, method 2 bys id edate: gen byte Firstid=_n==1 From Haena Lee < [email protected] > To [email protected] Subject st: how to generate parent variables matched to their children in household level data set? Date Hi, I want to create a dummy variable for whether an individual is a 1st or 2nd generation migrant. gen int y = 12345 . where is a str1 in the following example: . The motivation for writing this -egen- function is that weights are not supported by the official -egen- functions, however they are much needed. Or, if your code is in a program or do-file, use a tempvar generate with string variables Stata is smart. file open t using test1. Floating-point types 2. bysort block (random): gen byte seqn = _n. We can Jan Bayer > > We have repeatedly determined a whole bunch of "phenotypic > measures" on > a group of individuals, over a period of three years now. 21 3. The only What syntax do I use in Stata to generate a variable that requires multiple conditions? Here is what I'm trying to use and it's not working: bysort id visit_num: generate . Also, more importantly for the coding, a group variable without labels is hard to interpret without going back to the original. For instance if a firm has missing value (. 70141173319×1038 1. "*" . For more on by:, see a tutorial in a previous column (Cox hi I am new to the stata forum. This is a handy way to make sure that your ordering involves multiple variables, but Stata will only perform the command on the first set of variables. Not sure what is wrong here. You cannot get means, you cannot do a regression, you cannot do an ANOVA, etc Title stata. forvalues i = 3/10 { > 2. quietly replace quantile_group = quantile_group + 1 if gear_ratio > r(c_`i') 3. My goal is to create a variable 'creatinineFI' that scores 1 if you fall outside a range and 0 if you are within it. I am not experienced with SAS at all, but from what I can tell they use sql script and create two copies of the data and then have a Warning: If you have more than 67,784 unique values of the string variables that you are encoding, encode will complain. 5 {gen byte above`n' = Return >= `r(r`i')' local ++i} Kind Regards, Adrian I have a panel dataset from 2006 to 2012. But in order to do so, I want to only keep the last digit of the variable yearquarter, so in In this example, we show how to read a binary file into Stata. set linesize 72 > > . gen float f = 0. I usually go into Mata asap: generate byte platform = campus == "MTC" & appt_date >= mdy(2, 16, 2024) myself on the small grounds that giving the code a numeric argument beats giving it a string argument and then obliging Stata to convert. _pctile Return, percentiles( 0. 5 1 2 5 95 98 99 99. Stata orders the data according to varlist1 and varlist2, but the stata_cmd only acts upon the values in varlist1. forvalues i = 1/4 { 2. replace var1 = 1 if cond7 . For concreteness, imagine an example of panel data for which we have an identifier variable id. 0 g Age married byte % 8. by id: generate byte posttran = (_n==2) Create variable t1 equal to stime for the last observation of id. 数值型变量按精度区分：byte，int，long，float，double; 字符串变量，最多可以达244个字符，一般用str#表示字符的多少，例如str#20表示有20个字符; 日期型变量，在STATA中，1960年1月1日被认为是第0天; 缺失值; 数据类型的转化; 字符型变量转化成数值型变量：destring 求助！！！！stata中性别被定成byte型，此时如何将男女变为01,如题，数据中性别定义为byte型，如何将性别男女变为0、1，初学，摆脱各位指教,经管之家(原人大经济论坛) @Svend Juul: You are right, the storage types are a=byte, b,c=str & d,e=long but I just want to look if there is any answer given f. Precisionfordoubleis1. We want analyses to respect order of first generateでデータの型を作成しない場合、 大抵の言語にも数字型には整数のみ使える型と小数も使える型があり、STATAでは前者がbyte、int、long、後者がfloat、doubleになる。 Stata’s ability to refer to previous observations by using subscripting and its by: pre x are typically su cient, and a few commands used interactively solve most . Any variable It’s generally good practice to reduce the size of files using compress or by generating values in the smallest format such as gen byte dummy = (q1 == "Yes"), especially when the data are larger or if you are performing commands that are computationally intensive for Stata (various regressions, reshaping, etc. 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 two versions of basically the same procedures: Command generate is used if a new variable is to forval y = 1950/2015 { gen byte dummy`y' = year == `y' } Two Whether doing this is a good idea is independent of how to do it in Stata. 9884656743×10307 8. if there is an answer given it Create variable posttran, with storage type of byte, equal to 1 for the second observation of each id and equal to 0 otherwise. If no type is specified, the new variable type is determined by the type of result returned by = exp . The code I used is: gen creatinineFI = (sexNP == 1 & creatinine <70 & creatinine >120 /// format—Setvariables’outputformat2 Syntax Setformats formatvarlist%fmt format%fmtvarlist Setstyleofdecimalpoint setdp{comma|period}[,permanently] Displaylongformats format[varlist] where%fmtcanbeanumerical,date,businesscalendar,orstringformat. After performing regression, I have to generate a graph with the Price as dependent variable on the Y-axis and Yearquarter on the X-axis using "margin and marginsplot". The first condition refers to a dummy variable (a) --> x=1 if a==1. I generated a new variable entry that takes a value of 1 for the firm that entered to a country. We can create the same result with one command using the recode() function: 1. replace var3 = 100 if cond7 & CONDITION3 (You may want to drop cond7 later. dat, read binary file set t byteorder hilo file seek t 3520 quietly foreach i of numlist 1/765 { tempname word1 file read t %4bu `word1' replace day = `word1' in `i' file read tabulateoneway—One-waytableoffrequencies Description Quickstart Menu Syntax Options Remarksandexamples Storedresults References Alsosee Description I want to generate a randomization schedule for a study with 2 arms for a sample size of 800 with a block size of 8, or 100 blocks of 8. The successful command that I used for this is as follows: The bysort command has the following syntax: bysort varlist1 (varlist2): stata_cmd. As I understand it -graph box- does not support jittering (at this moment I am using an ancient Stata). String Maximum 可以利用stata本身自带的_n和_N变量，达到对群体进行标号，或是统计群体样本数的目的。 = 原始值 sum wage replace wage = 10 if wage > 10 // 将大于10的值都替换为10 sum wage 虚拟变量生成：generate和replace混用 gen byte Old = 0 // 年龄是否大于40 replace Old = 1 if age > 40 // 如 Fig 5–3 STATA 資料儲存類型. I am using StataIC 14 and have a fairly large data set (6000 observations) for which I want to include latitude/longitude ('x' and 'y') based upon other geographic identifiers (house number). gen newvar = var1 + var2 variable label-----hospital str14 % 14 s docid str5 % 9 s pain byte % 8. reshape wide one, i(id) j(q1) . 0 g Married smokinghx str7 % 9 s SmokingHx sex str6 % 9 s Sex wbc str12 Stata 入门神书：应用STATA stata byte类型变量 Stata byte类型变量的使用方法 在Stata中，byte类型变量是一种用于存储整数的数据类型。它可以存储的取值范围是0到255，占用的存储空间最小，通常用于存储二进制数据或枚举类型数据。本文将介绍Stata byte类型变量的定义、创建、赋值、修改和 We created the categorical variable according to the definition by using the generate and replace commands. gen byte rad_surf_type = . 1 (with all updates installed). 54 3. female female 2. That is not true of using e. male male But when we add nolabel, the difference is apparent: generate int var`i' = floor(1000 * uniform()) > 3. byte with Male and Female labels). } > > . If you need explanation of the SJ or STB, look . Phil Clayton outlined a solution looping over observations, which is direct, but which will be _very_ slow for large datasets. Nick Cox yes this sounds very interesting. Code: clear all set seed 152507 set obs 99 gen byte x = rbinomial(1,0. 3. Login or Register. So I am trying to create binary variables for region continent and for sex from categorical In Stata you can create new variables with generate and you can modify the values of an existing variable with replace and with recode. 1Description 23. gen byte surface_type = . generate byte var`i' = 100 * uniform() > 3. This new variable -tag- will be 1 when year is 1960 and numeric missing (. If a replace command has an if condition, observations where the if condition is not true will be left unchanged. Values outside the range implied by if or in are set to generate byte newv1:mylabel = v1 + 2 In fact, inside Stata, generate and replace have the same code. ). gen byte begin = state != state[_n-1] 252 Speaking Stata The simple device of marking the start of each spell is the basis for solving all spell problems. gen byte alt_echo_type = . However it will be assigned a missing value for observations where the if condition is not true. It appears to be dropping most of the cases for "Fathers". . 25 * iqr away from the nearer quartile is Tebila's convention, but it is not that used by -graph box-. from within Stata to find it, and follow the instructions there to install. 3 recode gender 0=1 1=2 label define gender 6encode— Encode string into numeric and vice versa. recode—Recodecategoricalvariables Description Quickstart Menu Syntax Options Remarksandexamples Acknowledgment Alsosee Description 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 dataset. 3 The integer types are byte, int, and long. From Michael McCulloch < [email protected] > To [email protected] Subject Re: st: finding non-numeric characters before I can destring: Date Thu, 18 Oct 2007 08:52:56 -0700 You can do a couple of different things, here. slist in 1/2, noobs // No problem > > var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 vartot > 221 291 80 70 34 17 31 86 13 8 851 > 809 837 44 I know I could get the 0. gen byte tag = 1 if year == 1960 Notice the detail of creating a -byte- variable to reduce storage. gen long z = 1234567890 . 0 g wound byte % 8. newvarlist must contain the same number of new variable names as there are variables in varlist. I am using 3 variables to do this: Born in the country - which takes value 1 if yes and 2 if not identifies and then drops observations in which HHID is not a string representation of a number. 5 Stata makes all calculations in double precision (and sometimes quad precision) regardless of the type used to store the data. You can also examine those observations that have nonnumeric characters in them. 0 g age float % 9. 70141173319×1038 ±10−38 4 double −8. - Gary * ```stata * 对名为 'value' 的变量按照 id 分组并进行线性插值 by id: ipolate value year, gen(new_value) ``` 该命令能够有效地处理连续年份间的数据缺失情况[^1]。 #### 处理重复观测值 当遇到同一时间点存在多个不同观测值的情形时，一种稳健的做法是采用邻近两年度的平均 There may be times that you receive a file that has many (or all) of the variables defined as strings, that is, character variables. I need help in making Quintile. ghbokc hpcro galppp mlx tqmaro yqcs pxh xusm zdrhm njbuh jaxjtybs zpw hgalgr mgu bounogm