: Sum if stata With every other command with which I have used an if qualifier, the c Learn how to effectively `calculate the sum of variables` in Stata for annual data using simple commands and commands in Mata. list Jul 23, 2013 · When you run a "conditional" if like sum price if price > 4499, Stata finds the observations for which price exceeds 4,499 and then runs the summarize command on those observations. Feb 12, 2017 · There might be an easier way to code this doubled sum in stata. egen sum2=total(a) . Feed to egen, total() a true-or-false expression and the result will be the count of observations for which the expression is true (1); arguments that are false (0) are ignored in the sense that they make no difference to the sum. Without the detail option, the number of nonmissing observations, the mean and standard deviation, and the minimum and maximum values are presented. Description total produces estimates of totals, along with standard errors. It shows how to use the Stata commands tab, list, sum, table, and if. varlist may contain any number of string or numeric variables. Aug 10, 2015 · It's particularly helpful to copy commands and output from your Stata log window and paste them into your Statalist post using CODE delimiters, as described in section 12 of the FAQ. How can I do that? I've tried summing across the columns with "egen example = rowtotal ()", but would need to type each of the 200 variables there? Nov 19, 2018 · 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. How to use if qualifiers and if statements in Stata. By default, each case (i. A great websit Sep 30, 2020 · I use Stata 13. for Excel that woud be =SUMIF (range, criteria, [sum_range]) For example: 21sep2009 is in date1 and appears in date. Options Main detail produces additional statistics, including skewness, kurtosis, the four smallest Apr 10, 2015 · Let's say I have three columns of data. The rawsum function, however, ignores the weights and sums only the specified variable, with one exception: observations with zero weight will not be included in the s Is there an easy command to sum the values of all observations of a variable. If I use egen with if, if year > 2002 { bysort year month :egen Z= total( x*weight) } else { bysort year month : egen Z= total(y*weight*0. You could do this recode region 1/4=1 5 6 7 13=2 8/12=3 , gen (zone) bysort year industry zone : egen tax_zones = total (tax) I don't see that -collapse- is the best solution here, given what else you are likely to be doing. 1 Overview Stata has two matrix programming languages, one that might be called Stata’s older matrix language and another that is called Mata. Edit: easiest way is to generate the variable and then use replace commands for each if condition. I want the sum total of variables "patients" and "providers" categorized by variables "year" and "region" for a specific variable "stress_echo". With detail, the same information is presented along with the variance, skewness, and kurtosis; the four smallest and four largest values; and the 1st, 5th, 10th, 25th, 50th group over subpopulations defined by varlist; optionally, suppress group labels by(varlist) requests separate summaries for each group along with an overall total. There are 48 such observations. 1 and I couldn't get the results I want. clear . We can use the keep command to keep just these five variables. k. Summarize). , subject) is given a weight of 1. suffix over a network, whether by use, net, update, etc. com marize() option produces one- and two-way tables of summary statistics Remarks are presented under the following headings: One-way tables Two-way tables Description egen creates a new variable of the optionally specified storage type equal to the given function based on arguments of that function. Oct 8, 2015 · It looks like you are essentially trying to create totals for unique combinations of id and eventid, not id and year. , it also looks for filename. colsum(Z) and colsum(Z, missing) return a row vector containing the sum over the columns of Z. See -help varlist- for full details. Sum of Wgt. The functions are specifically written for egen, as documented below or as written by users. com summarize can produce two different sets of summary statistics. sysuse auto For this module, we will focus on the variables make, rep78, foreign, mpg, and price. Technical note s sum() function and egen’s total() function. I tried to find a solution with separate sum commands, but the result is slightly different from what it should be. Hi all--Is it possible to have multiple conditions using an if statement? I'm trying to create several variables and sum all but two of them. 1 41 commands Putting aside the statistical commands that might particularly interest you, here are 41 commands that everyone should know: Nov 16, 2022 · How do I create variables summarizing for each individual properties of the other members of a group? Quick start Report means and overall, between, and within standard deviations for all numeric variables in xtset data xtsum Nov 14, 2019 · 1 0 14jan2010 26apr2009 I would like to sum the variables likes and comments, if the date in date1 appears in date. Here's my code: foreach e in aborig afr asia can camer carber euro namer nonabor ocean samer{ gen `e'_grt=pob_`e'+poc_`e' if "`e'"!="aborig" | "`e'"!="nonabor" replace sum_grt=sum_grt+`e'_grt } It executes, but does not perform the second part of the if Nov 6, 2018 · 在stata中如何使用summarize中的if条件 yourshi0099 2018-11-06 7269人看过在stata中如何利用summarize中的if条件实现对国产车和国外车一加仑汽油所行驶的里程数的比较 May 1, 2016 · Hello, I'm looking for an equivalent in STATA to MS Excel's SUMIFS function. rawsum would have worked as the solution to all three cases. In Stata, you can use different kinds of weights on your data. This video is for students in Soc 357 Methods at UW-Madison, Spring 2020. If Stata finds that file, Stata reads it and uses its contents to verify I have data like this year month X Y weight 2013 1 1 0 1000 2001 12 0 1 2000 I want to create a variable Z based on the X and Y variables, conditional on year. Its result will be non-zero if the non-missing values have cumulative sum non-zero. Let’s use the auto data file. So now all likes and commentst are summed up so in sum i have 2 likes and 3 comments for that date. Whenever Stata reads file filename. First, let’s use the kids file (and clear out the existing data). The sum of the boy dummy variable is the number of boys and the sum of the girl dummy variable is the number of girls. The rawsum function, however, ignores the weights and sums only the specified variable, with one exception: observations with zero weight will not be included in the sum. My command is this: bysort round_year ( firm_id_new) : gen ind_patsubgrp_total = sum ( expgrp_total) I was expecting in the 4th column to have the total value 75 for all 1978 Description summarize calculates and displays a variety of univariate summary statistics. keep make rep78 foreign mpg price Description rowsum(Z) and rowsum(Z, missing) return a column vector containing the sum over the rows of Z. c. If no varlist is specified, summary statistics are calculated for all the variables in the dataset. ---This video is based on the q Nov 16, 2022 · Why doesn't summarize accept pweights? What does summarize calculate when you use aweights? Follow-Ups: Re: st: -egen total ()- function and indexing within the -if- condition From: Nick Cox <njcoxstata@gmail. These optional files are used to reduce the chances of corrupted files going undetected. Oct 24, 2016 · I don't understand what you mean, esp by "to replace the latter variable"; if you want to sum variables and have missing values treated as 0, use the -egen- command with the "rowtotal" function; if you do not want a new variable but want instead to have either the sum or field1 if field2 is missing or field2 if field1 is missing you want to use Sep 11, 2024 · sum在 Stata 中，sum 命令用于提供变量的描述性统计信息，包括观测值的数量、平均值、标准差、最小值、最大值等。基本用法： 1sum [varlist] [if] [in] [weight] [, options] varlist 是你想要计算描述性统计的变量列表。 if 是一个条件表达式，用来指定满足特定条件的观测值。 in 是一个范围，用来指定想要计算 Feb 13, 2016 · I was too focused on promoting the cond () function to solve the conditional sum to realize the situation was inappropriate. If for an observation 3 of those criteria are true, using this code, this hypothetical observation would be assigned a missing value. I have no idea how to do this in Stata - please help. A count is a sum of indicators, so this shows some technique rather than necessarily being an answer. Mean – This is the arithmetic mean across the observations. When you do a "programming if", the execution is: Stata reaches the if statement and decides whether the condition is satisfied. 5) } this code is not going to work, because You are confusing & and |, and also two distinct syntaxes for -egen-. While we only considered the count if and summarize commands, you can also use the if condition -egen, sum ()- is just the same as -egen, total ()-. tabstat varlist, by (category) statistics (stat1 stat2…) reports summary statistics by groups, where multiple statistics can be specified, including mean, sum, count, standard deviation, percentiles etc. For example: ID bmi 1 26 2 18 3 20 SUM bmi = 64 trueYou could just generate a new variable equal to one if your conditions are met and zero otherwise. Menu Statistics > Summaries, tables, and tests > Summary and descriptive statistics > Summary statistics Description summarize calculates and displays a variety of univariate summary statistics. -egen, sum ()- was cloned as -egen, total ()- in Stata 9 for precisely the reason you identify. stata. r stands for return as in returned results, e stands for estimation as in estimation results, s stands for string, and, admittedly, this last acronym is weak, n stands for null. Nick [email protected] Leonor Saravia I would like to sum the variable "tax" by "year" (2001-2004 Jun 15, 2017 · Stata code to conditionally sum values based on a group rank Asked 8 years, 5 months ago Modified 8 years, 5 months ago Viewed 4k times stata. On the other hand, I think there's a reasonable possibiity that the OMS variables are not "numbers" but rather "numeric identifiers" like the ICD9 codes that turn up on Statalist occasionally. Sep 9, 2016 · When gazing at the view of a Stata dataset provided in the Browse window, or some -list- output, it is tempting to think of a Stata dataset as a spreadsheet and, if one has been using Excel extensively, to then draw on one's Excel-based experience in approaching data analysis. Stata’s Mata is the new one, and there is an uneasy relationship between the two. recorded a missing for x. Sep 11, 2022 · Now, I want to collect the sum of the values of the first 12 variables in another one called, say, "tot_2000" which should contain just one number (in this example it is 18). Stata’s sum() function creates the running sum, whereas egen’s total() function creates a . com> Prev by Date: st: quantile-quantile plots Next by Date: Re: st: -egen total ()- function and indexing within the -if- condition Previous by thread: st Dec 25, 2021 · In this module you learnt how to apply Stata commands on a subset of data using the if condition. sum. noshow prevents stsum from showing the key st variables. Based on your example, the event date and "special date" flag (event) don't seem to matter in calculating the desired sum. So I want statistics on number of observations, the mean and standard deviation by the following. Follow-Ups: RE: st: Egen to sum across rows (with an if across rows) From: Lucy GELDER <l. au> References: st: Egen to sum across rows (with an if across rows) From: Lucy GELDER <l. Column 1 tells me the originating city, column 2 tells the destination city, and column 3 tells the price of the trip. com> Re: st: -egen total ()- function and indexing within the -if- condition From: Maarten Buis <maartenlbuis@gmail. This option is seldom used because most people type stset, show or stset, noshow to set whether they 27. 14. Observations are in the same group if they have equal values of the variables in varlist. I managed to find the correct formula in MS Excel (by Specifying (sum) pop would not have worked because sum would calculate weighted sums (with a normalized weight). With detail, the same information is presented along with the variance, skewness, and kurtosis; the four smallest and four largest values; and the 1st, 5th, 10th, 25th, 50th Description checksum creates filename. Let's say I want to sum up all the prices for the trip from city X to city Y. How to use if statement with sum ()? Asked 12 years, 5 months ago Modified 12 years, 3 months ago Viewed 12k times Using IF with Stata commands | Stata Learning Modules This module shows the use of if with common Stata commands. – This is the sum of the weights. tab year region, sum (patients providers) if Mar 18, 2018 · Now I would like to sum first across all rows, and secondly across all but the first column (I could drop the first if necessary). Jun 15, 2015 · I am trying to get summary statistics for my data by group. But a Stata data set is not a spreadsheet, and your Excel-driven instincts are almost never helpful, and often get Feb 18, 2016 · Any Stata command that takes a varlist enables you to specify certain wild cards. gelder@ecu. e sum would calculate weighted sums (with a normalized weight). 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 for that same year across the rows. In your case, if these 15 are the only variables with the prefix recid_charges_prop, you could get the sum with: nothing may follow the open brace except, of course, comments; the first command to be executed must appear on a new line; Remarks and examples stata. Jan 25, 2016 · Say rather that sum() ignores missing values. I have two formulas for year before and after 2002. and also wondering if there is a way to give an equal weighting for each data (to create an equal weighted portfolio) Cheers, Chris Jul 19, 2016 · I want to first sort by group and date, and then perform a cumulative sum over one of the variables, but by group: In each group, I want to sum all previous values of the variable in that group, and then record this rolling or cumulative sum as another variable. edu. Therefore bysort id eventid: egen _sum = total(var1) or more simply egen _sum = total(var1) , by(id eventid) should both give you the total you want stata. generate sum1=sum(a) . For each product I'd like to calculate the total sum of market shares in the other regions (in the same month and year). sum files for later use by Stata when it reads files over a network. Then just sum up that variable. au> Prev by Date: st: Egen to sum across rows (with an if across rows) Next by Date: st: Rolling regression based on trading days Previous by thread: st: Egen to sum across rows (with an Description rowsum(Z) and rowsum(Z, missing) return a column vector containing the sum over the rows of Z. When this default is used, the sum of the weights will equal the number of observations. Once that works you can probably just make all of this in one line. set obs 5 obs was 0, now 5 . Oct 9, 2020 · However, Des (new variable) is a categorical variable so I went on to create a Dummy variable (with multiple indicators) DumDes to allow me sum or total across columns excluding certain indicators in DumDes (another New variable). May 29, 2018 · Note that by setting sum==2 in the last line you require that only 2 of the 6 statements on your third criteria are true. Learn how to use logical operators to select subsets and subgroups of the dataset. Every command of Stata is designated r-class, e-class, or s-class, or, if the command stores nothing, n-class. How can I loop that? So, once I have a specific origin and destination pair, how can I search the rest of the columns to see if there's a match, and add the Sep 6, 2022 · Hi, I want to obtain summary data (specifically total sum) by using a couple of conditions. g. generate a = _n . How can I easily generate the sum of a variable? I know this can be done with the sum function, but can you get the sum as part of the output of a Stata program that generates univariate statistics (e. With detail, the same information is presented along with the variance, skewness, and kurtosis; the four smallest and four largest values; and the 1st, 5th, 10th, 25th, 50th Jul 3, 2016 · hi guys, how can i sum a row of data (stock price) on stata? I tried to looked up with help functions and some youtube video but couldn't find any helpful resources. Description estat summarize summarizes the variables used by the command and automatically restricts the sample to the estimation sample; it also summarizes the weight variable and cluster structure, if specified. Jun 14, 2013 · Stata. I tried a couple of different codes, including the one below, and I cannot seem to get it. When Stata processes the third observation in that region, it will calculate the sum of two elements (remember that one is missing) and then divide the sum by 3 when Could you, please, let me know how to obtain the scalar for the value of the column sum? I need the value I get using "egen sum (x)", but not the column of these values, but just a single number which stata would terat as a scalar. Thanks for the help . e. I have a database which includes prices, quantities and market shares of many products which were sold in different regions, months and years. I've searched the internet for info, but haven't found anything yet.

Sum if stata. There are 48 such observations.