Xtile by group stata. I don't know why -egenmore- is being singled out here.
Xtile by group stata. 问题背景我们经常使用 generate (后文简称 gen) 命令提供的 group() 函数对某个变量进行分组，产生分组变量 gg，继而基于 gg 变量进行后续的分组回归分析… xtile: Bin variable in groups (similar to Stata xtile) Description Bin variable in groups (similar to Stata xtile) Usage xtile(x, n = NULL, probs = NULL, cutpoints = NULL, wt = NULL) Value An integer vector representing groups corresponding to cutpoints. I have had this impression also while consulting the Stata material. 13. com> Prev by Date: st: RE: Problem with variables in glamm Next by Date: RE: st: how to exclude an observation when calculating the median of a group Previous by thread: Re: st: new package -fastxtile- available in Feb 13, 2024 · 您可以使用Stata的 xtile 命令来将公司规模分成上下三分位。假设公司规模变量为 size，您可以按照以下步骤操作： 首先，使用 sort 命令按照公司规模变量 size 进行排序： sort size 登录后复制 然后，使用 xtile 命令将公司规模变量 size 分成上下三分位，生成一个新的变量 size_group： xtile size_group = size, n(3 Jul 4, 2022 · Stata’s xtile function must be putting all identical value observations into a single decile group for that value, and hence preventing the deciles from each having uniform numbers of observations. Other way round, this is a common question, even when the number of non-missing values is a multiple of the number of bins: I asked for quantile-based bins. So when I gave xtile a specific year&month to split it, it did the trick for me. benchmarklevel 实验目标 在一个面板数据集中，已知目标变量名为SO2，想要逐年（year）对SO2构造高低组（创建新变量 H_SO2）。 方法1：cond Nov 26, 2020 · 本文揭示了Stata中gen命令的group ()函数在处理存在重复值的分组变量时可能出现的结果不稳定性问题。通过示例，解释了group ()函数的工作原理，指出其依赖于数据排序。文章提出了解决方案，包括使用xtile命令进行基于分位数的分组，以避免因重复值导致的随机分组。 stata分位数xtile-与其他Stata命令可灵活组合使用 。结合绘图命令展示分位分组后的可视化结果 。可以对不同变量分别进行分位分组操作 。比较不同分位组下多个变量间的关系 。能根据分位分组构建新的分类变量 。以分位分组为基础进一步筛选数据 。在教育评估中 ，用xtile评估学生能力水平分布 Oct 4, 2020 · 变量分组注意 如果采用 sort var gen gg=group(var) 分组，则按照样本量平均分组，如果里面重复值较多，则每次跑一遍程序则重新打算顺序。 如果重复值较多，建议采用xtile分组。 xtile gg=var, nq(5) ，且xtile默认不会将空缺值分入组内，但是采用group则会分进去。 可以参见连玉君老师的帖子： [ stata分组注意 Stata has built-in commands -ptile- and -xtile- for calculating the quantile ranks of a variable. The package includes: panel data functions (monthly/quarterly dates, lead/lag, fillin) data. xtset panelvar timevar declares the data to be a panel in which the order of observations is relevant. Could anyone please help me, I would much appreciate this since I have been struggling for a while to get around this problem. 5 Jun 11, 2018 · What would be an equivalent SAS code for this STATA code: xtile patient_xtile = totalpatients if surveymiss !=1, nquantiles(4) ta patient_xtile bysort patient_xtile: sum totalpatients Thanking you in advance. As far as -egenmore- is concerned, the whole package is pretty much an Jan 3, 2021 · 文章浏览阅读954次。文章揭示了在Stata中使用gen命令的group ()函数进行分组操作时，由于排序依赖性，可能导致分组结果不一致。问题源于当分组变量存在重复值时，group ()函数无法确保稳定分组。解决方案包括使用xtile命令基于分位数分组，或者在排序命令中添加sort稳定的选项以保持数据相对顺序。 Jan 12, 2021 · Faster Stata for big data. Contrary to general pedagogic practice, I start with examples that are about as tricky as is common (bad news first) and end with examples where handles for sorting into the desired order already exist (good news follows). I realize that the "by" group does not work with "xtile". In doing so, I am using the xtile command: sysuse auto. Thus -egen, xtile ()- is a user-written function (by Ulrich Kohler) in the -egenmore- package on SSC. When you specify timevar, you can then use Stata’s time The problem is that I don't know the method Stata xtile uses, and I want to reduce mismatches between the code below and Stata xtile when run on the same data set. Algorithms that I've tried: import numpy as np def mark_weighted_percentiles(a, labels, weights, type): # a is an input array of values. generate newstr = s1 + string(n1) + string(n2) + s2 arks of StataCorp LLC. Description Option by() repeats the graph command for each value of varlist and arrays the resulting individual graphs into one graph. 5 and also the 99. The point I am going to make arises frequently, and has featured more than once recently on Statalist. for each panel. Suppose that we have n ordered values, which can be thought of as laid down in a series end to end like this: Feb 27, 2023 · I recently had a dataset with two groups (0 or 1), and a continuous variable. astile is faster than Stata official xtile. Description xtset manages the panel settings of a dataset. xtile is based on a command originally posted on Statalist (see [U] 3. Both methods used by -pctile-, the default and -altdef-, are consistent with the Help generating a variable which contains the percentile for each observation : r/stata r/stata Current search is within r/stata Remove r/stata filter and expand search to all of Reddit Jun 3, 2019 · Displaying percentiles in Stata June 03, 2019 Sometimes you want to display the percentiles of a variable to get an idea of how values are distributed. At the end of the year, if they pooled their data together, they would have a dataset (for example, xtline1. colorvar options allow you to specify the cutpoints or the number of levels to be created for colorvar. So far I've had to work on each province separately. stata分位数分组 介绍 分位数分组是一种常用的数据分析方法，可以将数据分成若干组，每组包含一定百分比的观测值。在Stata软件中，有多种方法可以进行分位数分组，本文将详细介绍如何使用Stata进行分位数分组的操作，以及分析结果的解读和应用。 什么是分位数分组 分位数是指将所有的数据按 I > have tried several methods but the groups are not equally sized. Itcreatesonevariabletakingonvalues1,2,forthegroups formedbyvarlist. varlist may be a numeric or a string variable. Description margins calculates statistics based on predictions of a previously fit model. egen both_group = group (mpg_group weight_group) label Remember the request to explain where non-official commands you use come from. html Sent from the Statalist mailing list archive at Nabble. Step 1 was to generate an overall decile variable with an –xtile– command. varlistmaycontainnumericvariables,stringvariables,oracombinationofthe two. Description colorvar options allow you to create two-way plots in which the color of the markers, lines, spikes, dots, or bars varies based on the values of a numeric variable. The Stata help says that xtile is used to: Nov 23, 2011 · 人大经济论坛 › 论坛 › 计量经济学与统计论坛 五区 › 计量经济学与统计软件 › Stata专版 › 请问xtile和pctile什么区别？如果想求收入的五等分组，到 Mar 31, 2017 · stata怎么将某一变量按大小分为三组,在做国有企业的非效率投资，稳健性检验中，想将模型残差（非绝对值）按大小分成3组，选择残差最大的一组作为投资过度组，选择残差最小的一组作为投资不足组，中间一组剔除，再次进行回归，请各位大神不吝赐教，谢谢 Nov 16, 2022 · To view examples, scroll over the categories below and select the desired thumbnail on the menu at the right. I now want to create a new variable, income_group, which has a value of 1 if the respondent's income is less than the 50th percentile, 2 if the respondent's income is between the 50th and 90th percentile, and 3 if it's greater than the 90th percentile. For instance: assigns to ptile the percentile rank associated with the variable x. When you specify timevar, you may then use Stata’s time-series operators such as L. The third line reads -version 6- so I think it will Oct 15, 2019 · 使用するCodeは xtile newvar = var, nquantiles (4) Command（コマンド）欄にxtile newvar = var, nquantiles (4)と入力。 その後、varに自分が4分位に分割したいvariableの名前を入れる。そして新しくできるColumnにつける名前をnewvarのところに代わりに記載する。 そして CommandをRunするとDatatableに自分のつけた名前の by (varlist) Compute quantiles by group (pctile or xtile only). I would like to create > deciles of mcap by years (not across the entire That is, -xtile ()- creates a new variable that categorizes a variable by its quantiles. This packages uses C plugins and hashes to provide a massive speed improvements to common Stata commands, including: reshape, collapse, xtile, tabstat, isid, egen, pctile, winsor, contract, levelsof, duplicates, unique/distinct, and more. You can still follow this guide to understand how bi-variate maps are Nick [email protected] I would be grateful for advice on the xtile function. I'm working in Stata 9 SE for Windows. xtile 命令 使用 xtile 命令，可以对某一个变量数进行等分组。 dis_inc 表示可支配收入， inc_group 表示按照可支配收入分组，生成的收入组变量，取值是 1-5， 1 为低收入组 (20%)， 2 为中低收入组 (20%)， 3 为中等收入组 (20%)， 4 为中高收入组 (20%)， 5 为高收入组 (20%)。 May 24, 2022 · 分位数やパーセントタイルで変数を作成pctileやxtileを用いる。リンクはこちら。pctileについてpctileコマンドは以下の様に用いる。pctile qrt1 = myvar, nq (n)\ (n\)には整数を入れる。このコマンドを References: st: new package -fastxtile- available in SSC From: Michael Stepner <stepner@mit. So far I've had to work on each province Feb 27, 2023 · I wanted to show how the overall deciles of that continuous variable varied by group. > > To do so, I use the xtile-command from the egenmore-package. In context, Stata understands the addition symbol + as specifying concatenation or adding strings end to end. 4 The Stata forum) by Philip Ryan of the Discipline of Public Health at the University of Adelaide, Australia. 3. Syntax gegen [type] newvar = fcn (arguments) [if] [in] [weight] [, /// replace fcn_options gtools_options ] Gtools options compress Try to compress strL to str#. statar This package contains R functions corresponding to useful Stata commands. Thanks! Jan 10, 2022 · Main idea: xtile bins to quintile bins on variable a_ip, with weights. May 30, 2024 · Now your xtile calculation is a binning exercise. Dec 7, 2021 · Note: This guide has been converted into the Stata bimap package that significantly improve the processes described below. Oct 14, 2016 · 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 the latter. When it comes to getting an overview of a variable perhaps the simplest and most powerful command is summarize along with the detail option: xtile is a bit of a distraction here, and not just because it can't be applied under by: (and lacks an equivalent option too). How many groups can Astile make in Stata? The values of size10 range from 1 to 10. ado" would show you. References: st: how to group variables into equal number groups From: Xixi Lin <winnielxx@gmail. Therefore, point estimation of the percentile for survey data can be obtained with pctile or _pctile with pweight s. This book compiles a number of my “Quick Stata Tips. -예를 들어, auto 데이터의 변수 price 를 최저 ~ 최고 금액을 3개의 그룹으로 나누어 가격순으로 나누어 준다. The code (Code II) below is my present solution and it seems very complicated. I have created a categorical variable denoting quintile group membership by region: egen quin=xtile (income), by region nq (5) weight (wght) I would like to know how I can create a variable that includes a percentile value eg lowest quintle using weights. So the lowest 20% of observations (taking weighting into account) should be in bin 1, and so on. Feb 21, 2015 · Does anyone know the difference between the following two commands? egen variable_name = cut (X), group (4) xtile variable_name = X, nq (4) * Continuous variable X Faster implementation of Stata's collapse, reshape, xtile, egen, isid, and more using C plugins - mcaceresb/stata-gtools I have > created a categorical variable denoting quintile group > membership by region: > > egen quin=xtile (income), by region nq (5) weight (wght) > > I would like to know how I can create a variable that > includes a percentile value eg lowest quintle using weights. e xtile quintile=exp[aw=weight] if------, n(5) 2. com graph twoway rline — Range plot with lines Syntax Remarks and examples Menu Also see Description Nov 6, 2024 · stata数据处理——分位数分组的命令分位数分组是数据处理中常用的技术，它能够将数据集按照特定的分位数切割为多个组别，适用于数据分布分析和分类。Stata 提供了多个命令来实现这一功能，下面介绍其中的三个：-pcti > Hi, > > I analyze a panel dataset that includes the daily market capitalizations of a group of firms. My data do contain ties and I think this is the I don't know why -egenmore- is being singled out here. Thanks in advance Feb 13, 2015 · This is the Stata code I used to divide a Winsorised & centred variable (num_exp, denoting number of experienced managers) based on 4 quartiles & thereafter to generate the highest & lo 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. Step 2 was to make a frequency histogram. If the expenditure variable is 'exp' and 'weight' is the weighting variable, then to create the income quintiles type xtile quintile=exp[aw=weight], n(5) you can use the 'if' command if necessary. gquantiles is a by-able replacement for xtile, pctile, and _pctile that offers several additional features, like computing arbitrary quantiles (and an arbitrary number), frequency counts, and more (see the examples below). But one of its rules is that observations with the same value always go into the same group. frame functions (tabulate, merge) vector functions (xtile, pctile, winsorize) graph functions (binscatter) Data Frame Functions sum_up = summarize sum_up prints detailed summary statistics (corresponds to Stata summarize) N Feb 20, 2017 · I am converting Stata code into R, so statar::xtile gives the same output as the original Stata code but I thought dplyr::ntile would be the equivalent in R. I follow a twoway bar displays numeric ( , ) data as bars. But an approach from first principles, as in Sergio's post, is always welcome. 2009, 10:43 +0100 schrieb Kaspar Dardas: > Hello, > > > I have two variables years (2005 2006 2007) and mcap (which is the > capitalization of firms, numeric values). Note that colorvar options also apply to graph twoway bar — Twoway bar plots Syntax Remarks and examples. verbose prints some useful debugging info to the console. I have picked up these tips over the years from many different sources. dta) that contains the number of calories each of them consumed for 365 days. n2. I would like to create a group variable which tells me in which quartile an observation falls xtile is based on a command originally posted on Statalist (see [U] 3. These rankings are based on the values of an existing variable, mvalue. ) Create Portfolios in Stata using astile astile : A brief introduction astile creates a new variable that ranks values of an existing variable on a scale of 1 to n. I could be mistaken but I have noticed two possible issues with -pctile- and -xtile-: 1. I am absolutely new to stata and I am am having some trouble creating a variable Here is the command for creating the variable egen y =… When we have survey data, we can still use pctile or _pctile to get percentiles. >> >> >> If I were to group 'epc' by national quintiles I would use the command: >> >> xtile q_epc = epc [fweight = weind], nquantiles(5) >> >> But what if I would like to generate quantile groups for each >> province? Is there any quick way to do this? The 'by' option wouldn't >> work with 'xtile'. As the original author of tag () I know, and many Stata users know too, that it selects the first value in each group, so as you say with your sort order it selects year 2012. It's speed efficiency matters more in larger data sets or when the quantile categories are created multiple times, e. com/xtile-command-Stata-10-tp6309599p6309599. groupid (varname) Store group ID in varname. That creates an obligation to say which kinds of weights are supported. ” I am basing this book on Stata version 18 (and sometimes 17) on a Mac. 1 02May2018 Builds: Linux, OSX , Windows (Cygwin) Faster Stata for Group Operations This package's aim is to provide a fast implementation of various Stata commands using Subscribed 3 1. by without the sort option requires that the data be sorted by varlist; see [D] sort. astile 案例1：根据公司的市场价值创建10个分组 astile size10 = mvalue, nq (10) astile 比 state 官方提供的 xtile 命令处理速度更快。 它的高效性在数据集较大或者当分组类别被多次创建时更加明显，比如说，我们可能需要根据每个年份或者月份分别创建分组。 Feb 24, 2015 · I am trying to create indicator variables using different quantile levels. For > example, > > -xtile cat=income, n (100)- > (similarly with pctile) > and > -sumdist income, n (100) qgp (cat)- > > It produces the desired number of groups but they are not equally sized. For full Jun 7, 2014 · su group, meanonly gen QLagTNA = . Nevertheless, it can be improved. StataNow is a trad Jun 4, 2019 · Displaying percentiles in Stata 2 June 04, 2019 In a recent post we looked at listing percentiles of a variable. 创建分类分组变量tabtabulate type,gen (type_dummy) ////if type=1\2\3, then gen type_dummy1 type_dummy2 type_dummy3, and all is d… Most Stata commands follow the logic that using an if exp is equivalent to dropping observations that do not satisfy the expression and running the command. xtset panelvar declares the data in memory to be a panel in which the order of observations is irrelevant. Nov 7, 2022 · 将会使用到的命令tabulate //tab xtile //单个变量从小到大排序，均等分组 1. "soft" + "ware" produces "software", and given string variables s with some separator such as a spac . Example 1 Suppose that Tess, Sam, and Arnold kept a calorie log for an entire calendar year. (There is an egen function xtile() at egenmore on SSC. Jun 12, 2014 · Dear all, I am trying to do something conceptually fairly simple. How would I go about doing this? Any help is appreciated. My data do contain ties and I think this is the I get slightly different numbers if I sort and when I do not sort for example for one group I get 481 with and 477 without sorting) xtile xc = mcap if file, cutpoints (xu) drop xx xu * this bits cuts the y variable into three groups for each group of x egen yc=xtile (btom) if file, by (xc) nq (3) * forming the final 6 groups gen gp=10*xc+yc I think what you need is the -xtile- command. (When the cutpoints() option is not used, the standard logic is true. benchmark prints how long in seconds various parts of the program take to execute. 1588530. Is there a way to do that? For the weight I can use regular xtile: xtile quan = salary [aw=weight As it happens, there is a better way here, Uli Kohler's -egen, xtile ()- as part of -egenmore- on SSC. Aug 8, 2025 · xtile: Bin variable in groups (similar to Stata xtile) In statar: Tools Inspired by 'Stata' to Manipulate Tabular Data View source: R/xtile. Nov 9, 2015 · xtile groups for panel dataset 09 Nov 2015, 22:01 Hi, Here is a small sample of the panel dataset (permno qyear) that I have: Code: Jun 29, 2020 · → 코맨트 창에 db xtile 을 입력하고 xtile 대화창을 실행. Then a clunky way to find the highest value in a quartile is to use the list command with if conditions after sorting the values of the variable of interest. I wanted to show how the overall deciles of that continuous variable varied by group. i. The bigger issue is that -egen- does not take weights as such, so that use of -egen- with weights requires some work-around, for example the use of an option, as in -egen, xtile ()- on -egenmore-. (lag and Then you can proceed directly to something like . For Jul 30, 2019 · Type -help sumdist- and you'll see that there's an option to derive quantile group membership! (As it happens, -sumdist- calls -xtile- to do its work, as a "viewsource sumdist. But observations with the same value will always be assigned to the same bin. For finely spaced data, also View this message in context: http://statalist. This is not true of xtile when the cutpoints() option is used. Apr 26, 2018 · I am attempting to create quantiles of performance within groups of my data. If no varlist is specified, centile calculates centiles for all the variables in the dataset. nabble. ssc install egenmore . However, much—though not all—of the content in this book applies to (recent) prior versions of Stata. So just a question for understanding, xtile basically doesn't divide households into 5 equal parts rather decides cut-off points of each quintile based on cumulative percent? xtile函数是Stata中用于计算分位数的命令，可以将指定变量的观测值划分为等频或等距分组。 如果在使用xtile函数时遇到问题，请检查以下几个可能的原因： 检查是否正确输入xtile命令：要使用xtile函数，您应该键入类似于以下格式的命令： xtile newvarname = varname -xtile- is undoubtedly problematic -- as it reduces the information in your data and isn't guaranteed to produce equal-sized groups even when the number of observations is an exact multiple of the number of groups. Theorderofthegroupsisthatofthesortorderofvarlist. 5% percentiles for the variable "Return". I know the command of choice for this task is xtile, but Stata doesn't allow me to use it with "by" like in "by city date: xtile var=income nq (10)". by () is most useful with option groupid (varname). Why is the number of observations different in each? The answer is always ties (plus the small print for non-multiples, as From "Tim Wade" < [email protected] > To [email protected] Subject Re: st: Creating quintiles with "xtile" Date Mon, 26 Mar 2007 18:41:14 -0500 Yvonne, egen will do this if you install the egenmore package (ssc install egenmore) e. I will start by presenting an example on how _pctile works with survey data. If no centiles are specified, medians are reported. you can tabulate your expenditure vairable by the income quintiles. gquantiles is also faster than the user-written fastxtile, so an alias, fasterxtile Hi Statalisters, Can anyone comment on the difference between the way Stata's -xtile- command creates tertiles compared to the way the SAS -proc rank- creates tertiles? And the differences in which ties are handled? The following are the code I'm using and I am getting slightly different results. > (Which I see by looking at the frequencies when I say -tab cat- > thereafter). This is the case because survey characteristics, other than pweight s, affect only the variance estimation. For one variable, the code I am using is x Mar 25, 2017 · In the Github repository, you will also find a file called "test_fastxtile. ) xtile uses all nonmissing values of the cutpoints() variable whether or not these values belong to 1. . g, we might want to create portfolios in each year or each month. , egen mpg10 = xtile (mpg), by (foreign) nq (10) Hope this helps, Tim On 3/26/07, Yvonne Capstick < [email protected] > wrote: Apr 4, 2015 · (4) the cumulative quantile group shares of total x (with cumulation in ascending order of x), i. g. twoway bar is useful for drawing bar plots of time-series data or other equally spaced data and is useful as a programming tool. 11. 5, I believe this is because these are not integers. Previous by thread: Re: st: Re: How to generate quantile categories by group/varlist? Next by thread: st: estimation of short run coefficient in panel data with small time series and large cross section Apr 12, 2015 · xtile perfectly (close to perfect) splits my 254 data points into approximately equal sized quintiles. egen mcadecile = xtile (mcap), by (years) p (10 (10)90) Am Dienstag, den 10. They could then use xtset to identify the date variable and treat each person as a panel and use xtline to plot the Faster Stata for big data. 2. 5%, 1%, 2%, 5%, 95%, 98%, 99% and 99. This is my command: > > en month=mofd(date) May 13, 2020 · Unlike Stata’s official xtile, astile is byable. These statistics can be calculated averaging over all covariates, or at fixed values of some covariates and averaged over the remaining covariates. without using the mi passive command) generate the quntiles using xtile in each imputed dataset, using something like: Feb 26, 2019 · In addition I want to do a box plot of this gap for each decile (I want to have 10 box plots, one for each decile which shows the gap between group grades). astile handles group-wise calculations super efficiently. com> Prev by Date: Re: st: AW: Autocorrelation after xtdpdsys Next by Date: Re: st: graphing a 3 way interaction with mi data Previous by thread: Re: st: bug in -xtile- Next by thread: Re: st: bug in -xtile- Index (es): Scott ================ David wrote: The command xtile listed in the manual under pctile will give you the quartiles or quintiles you need. quietly forval d = 1/`r(max)' { xtile work = LagTNA if group == `d', nq(5) replace QLagTNA = work if group == `d' drop work } For more, see this link But you will probably prefer to download a user-written egen function [correct term here] to do this ssc inst egenmore h egenmore The function you want is xtile(). After you fit a choice model, margins provides estimates such as marginal predicted choice probabilities, adjusted predictions, and marginal effects that Jul 12, 2011 · xtile没有bysort功能，有哪个命令可替代,比如说：我有两个变量日期变量，从2001年1月1日至2011年7月1日市值变量现在要做的是按每一天的市值，分为高市值、中市值、低市值即分别按2001年1月4日、2001年1月5日的市值分为三等分，就是按不同的日期，对市值进行等分。 Mar 11, 2009 · 讨论如何在Stata中使用xtile命令对收入数据进行分组，并解决分组比例不均的问题。 Apr 22, 2021 · 登录 注册 写文章 首页 下载APP 会员 IT技术 Stata--用分位数分组xtile命令 古城路揸fit人 关注 赞赏支持 References: Re: st: bug in -xtile- From: Nick Cox <njcoxstata@gmail. if the number of visits is labled as 'visit' table exp, c(n visit) Cheers On Zoue, You may want to take a look at -xtile- This command will create a new categorical variable containing categories corresponding to the specified quantiles. With "by", the -xtile ()- makes the categorization for each by-group separately. I am creating a variable that contains categories corresponding to quantiles. A simple example would be when you create a scatterplot of variable versus variable and when you want different colored markers for levels of a third numeric variable, colorvar. After the comma, we specify the option nq (10), that tells astile to make 10 groups. Learn how to use the xtile command in Stata to create quartiles, quintiles, deciles, and other user-defined xtiles. Improvements and Extensions (2) lsmr estimator from Matthieu Gomez ftools allows significant speedups in Stata with large datasets (based on optimizations by Python’s Pandas) Publicize collected benchmark datasets May 12, 2018 · For example, if we want to make 10 portfolios, values of the newvar will range from 1 to 10. com> Re: st: how to group variables into equal number groups From: Marcello Pagano <pagano@hsph. For example, we might be interested in making 10 firm size-based portfolios. Apr 29, 2020 · Then after learning about Quintile makiing in stata I copied the the Column V1 from excel sheet and pasted into stata sheet to run the xtile command in order to make quintiles but unfortunately I saw the error mismatch when i run the command. pctile [ ()] requires option strict, which has the effect of ignoring groups where the number of quantiles requested is larger than the number of non-missing observations within the group. Now, I want to group these firms into deciles based on their market capitalizations on a monthly basis. Many—though not all—of the tips build on concepts introduced in earlier tips. One way of achieving this is by using the pctile command which creates a variable containing the percentiles according to specification. In order to get every 10th percentile (ie. Weichle, Thomas Can anyone comment on the difference between the way Stata's -xtile- command creates tertiles compared to the way the SAS -proc rank- creates tertiles? And the differences in which ties are handled? The following are the code I'm using and I am getting slightly different results. Title stata. > I tried the folllowing but weights were not allowed: > > by region: egen stata中xtile用法-实际操作中有个细节要注意。如果原始数据里有大量重复值，分组可能会出现“不均匀”的情况。比如某个班级50个学生中，有10个人数学都考了80分，这时候用`xtile`分成四组时，系统会优先保证分界点的准确性，可能导致某些组的人数略多于或少于25%。这种情况需要结合`altdef`参数 Dec 2, 2016 · In particular in the last quintile? The only explanation that I can come up with is that when Stata constructs quintiles with xtile, it excludes from the computation those observations that present a replicate value of NetWealth. In the second syntax—xtset panelvar timevar—the data are to be a panel and the order of observations within panel are considered ordered by timevar. the Lorenz ordinates L (p_k) at each p_k = F (x_k) for quantile points x_k Learn to create portfolios and perform portfolio anlaysis in Stata, calculate value weighted and equal weighted portfolio return in Stata. The -xtile- problem is a clustering problem, so that we should worry about the combinatorics of possible solutions, but -xtile- sensibly ignores that. However, STATA does not recognise the 0. and F. -xtile ()- is especially useful for data from cross-country comparative surveys. edu> Prev by Date: Re: st: how to group variables into equal number groups Next by Date: Re: st: Using foreach and forval to append data files Previous by thread: Re: st: how to group variables Hi Everyone, I have a variable, income, that details some respondents' incomes. forcestrl Skip binary variable check and force gtools to read strL variables. In Stata, type -help xtile- to find out more. gquantiles Efficiently compute percentiles, quantiles, categories, and frequency counts. Stata automatically created four levels from the age variable and assigned a color to each level. BUT! I wanted these histograms to overlap and not be side-by-side. ) With a membership variable created (with values 1,, 10, for the decile group case, you can then loop to derive group totals Oct 30, 2020 · Hi, I am using the following loop to get the 0. Line for the server -which- the command and note that it is dated "30sep2004", during the lifetime of Stata 8. egen mpg_group = xtile (mpg), by (weight_group) nq (3) . from 10 to 90), we utilize the nquantiles option (number of Strange though it may seem, -xtile- doesn't try directly to equalize group frequencies. group(varlist)[,missingautotypelabel[(lblname[,replacetruncate(#)])]] maynotbecombinedwithby. Description centile estimates specified centiles and calculates confidence intervals. What I first did was to compute the deciles using xtile for both groups: xtile decileA= mat if group==1, nq(10) xtile decileB= mat if group==0, nq(10) Feb 13, 2024 · 您可以使用Stata的 xtile 命令来将公司规模分成上下三分位。假设公司规模变量为 size，您可以按照以下步骤操作： 首先，使用 sort 命令按照公司规模变量 size 进行排序： sort size 登录后复制 然后，使用 xtile 命令将公司规模变量 size 分成上下三分位，生成一个新的变量 size_group： xtile size_group = size, n(3 Oct 4, 2021 · The focus of this column is on methods to produce such ordering or ranking of groups, which in practice often hinges on some convenient functions in egen. May 13, 2024 · Stata gtools是一个用于Stata统计软件的扩展程序包，它提供了一组额外的命令和函数，用于数据处理、图形绘制和模型拟合等方面。其中包括一些常用的命令，例如：collapse、reshape、egen、levelsof、xtile等。此外，gtools还提供了一些高级的命令和函数，例如：glogit2、gmm、gquantile等，这些命令和函数可以 Then you can proceed directly to something like . harvard. do" that runs a battery of tests comparing the speed of fastxtile to xtile and ensuring that fastxtile accurately matches the xtile results. dta local outcomes mpg foreach outcome in `outcomes' { bys What I would like to do is cut the y variable for each group of x based on the 30th and 70th percentile value. The syntax and purpose Apr 13, 2021 · In this video, we will learn about three stata commands: "ipolate" "mvencode" and "pctile d 'EGENMORE': modules to extend the generate function d d This package includes various -egen- functions. R If I were to group 'epc' by national quintiles I would use the command: xtile q_epc = epc [fweight = weind], nquantiles(5) But what if I would like to generate quantile groups for each province? Is there any quick way to do this? The 'by' option wouldn't work with 'xtile'. 4 The Stata Forum) by Philip Ryan of the Discipline of Public Health at the University of Adelaide, Australia. For instance, in data collected from repeated surveying of the same people over various years, panelvar might be person and timevar, year. Overview This package provides a fast implementation of various Stata commands using hashes and C plugins. version 0. Interpretation of percentiles and percentile ranks ===================================================== It seems to me that -xtile- gives results that are inconsistent with the method used by -pctile- for computing quantiles. 2K views 2 years ago #stata #tutorial #stata #tutorial Stata xtile command | Quintile Variable in Statamore Mar 13, 2014 · If you impute using the long form in Stata, my first idea was to manually (i. sysuse auto May 18, 2025 · CSDN问答为您找到Stata中如何根据某变量值大小自动分组并进行回归分析？相关问题答案，如果想了解更多关于Stata中如何根据某变量值大小自动分组并进行回归分析？ 青少年编程 技术问题等相关问答，请访问CSDN问答。 Dec 21, 2020 · 本文揭示了Stata中使用`gen`命令的`group ()`函数进行数据分组时可能出现的不稳定性问题，特别是在变量有重复值时。通过示例解释了`group ()`函数的工作原理，指出`sort`命令未加`stable`选项可能导致分组结果随机变化。解决方案包括避免使用`group ()`函数处理重复值多的变量，以及考虑使用`xtile`或` Jul 2, 2020 · Thank you for the references. Stata has built-in commands -ptile- and -xtile- for calculating the quantile ranks of a variable. If I understand your question, you plan to subset the data into quantiles and then performing analysis on the subsets will produce incorrect results. Aug 2, 2015 · I have data with income variable, with weight, and I want to calculate the 5% quantiles by year. You must xtset your data before you can use the other xt commands. References: st: xtile Stata 8 From: [email protected] st: xtile Stata 8 From: [email protected] From: [email protected] Prev by Date: st: xtile Stata 8 Next by Date: SV: SV: st: Survey - raking - calibration - post stratification - calculating weights Previous by thread: st: RE: xtile Stata 8 Index (es): Date Thread Date Thread Faster implementation of Stata's collapse, reshape, xtile, egen, isid, and more using C plugins - mcaceresb/stata-gtools Mar 27, 2022 · 1. What do you think? 作者：连玉君 (知乎 | 简书 | 码云) 连享会 最新专题 直1. com. I know I could get the 0. edu> Re: st: new package -fastxtile- available in SSC From: David Muller <davidmull@gmail. Includes missing values when present in the original vector. String variables ation of string variables is provided in Stata. Stata and Stata Press are registered trademarks with the World Intellectual Property Or-ganization of the United Nations. To do so, I use the xtile-command from the egenmore-package. Stata’s handy –histogram– is a quick I understand STATA > allows one to get deciles for the full data set (in my case I used: > xtile size_decile=size1, nq (10)), but I really need to get my deciles > by year. Best wishes Roger Roger B Newson BSc MSc DPhil Lecturer in Medical Statistics Respiratory Epidemiology and Public Health Group National Heart and Lung Institute Imperial College London Royal Brompton Campus Room 33, Emmanuel Kaye Building 1B Manresa Road Dec 4, 2023 · I'm using the following Stata code to calculate value weighted (wt) groups based on a variable called x: egen q = xtile (x), by (year) nq (2) weights (wt) However, the code above gives me very unequal groups, something like: Group1: 1000; Group2: 100 I couldn't find the help file on how the weight is used when calculating these groups. This packages provides a hash-based implementation of collapse, pctile, xtile, contract, egen, isid, levelsof, and unique/distinct using C plugins for a massive speed improvement. e. There is a egen function in -egenmore- for this: . So, perhaps I should not raise it again, except that some inefficient habits Feb 10, 2022 · xtile () isn't ranking; it's binning. inbc pvaqb vezeac sadb ehbsr fnmpgri rsmsj dlnb yktaibk lplnq