Stata function count

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August undefined, 2024

WebJul 6, 2024 · 1 I want to know how to calculate in Stata the total number of columns and rows in a .dta or dataset. For example, in R language, I know there are two commands "nrow" and "ncol", which returns the number of columns and rows in a dataset. The "dim" command gives the dimensions of the table. Can anyone please help me what command I should use? WebFeb 7, 2024 · Count the number of observations for each stockid. bysort stockid: egen numobs = count (stockid) (You can accomplish the same thing with tabulate stockid or duplicates report stockid .) egen Suite of Commands The egen command consists of functions that extend the capability of the generate command.

Count observations satisfying speciﬁed conditions

WebPay attention to whether the function you are using needs to specify gen or egen a. Notice that sum works for both gen and egen (even though it is not in the egen documentation and works differently - egen + sum = creates a total for all values specified in the by - gen + sum = creates a cumulative sum over the observations specified WebCount unique values in Stata Ask Question Asked 6 years, 11 months ago Modified 10 months ago Viewed 41k times 6 codebook is a great command in Stata. It describes data contents but also simply identifies unique values sysuse auto, clear codebook mpg, compact Number of unique values of mpg is 21. triathlon féminin

stata - Count by groups and collapse - Stack Overflow

WebIn Stata version 10: gen date2 = date (date, "DMY") The mdy () function takes three numeric arguments (month, day, year) and converts them to a date variable. generate birthday=mdy (month,day,year) You can display elapsed times as actual dates with display formats such as the %d format. format birthday %d WebA Comparison Between Some Methods of Analysis Count Data by Using R-packages 1 Faculty of Comp. and Math., Dept. of math , University of Kufa, Najaf ,Iraq 2 Al-Furat Al-Awsat Technical University, Najaf ,Iraq a) Corresponding author: [email protected] b) [email protected]‏ Abstract. The Poisson regression model is a simple count data … WebNov 10, 2024 · #1 count total observations per variable group 15 Aug 2014, 06:55 I have an id variable for firms (IMP), the destination of their exports (countryX), and the year (year). I need to count how many firms are exporting for each destination and for each year. tent national park new mexico

Stata tip 98: Counting substrings within strings

Count unique values in Stata - Stack Overflow

WebThe Stata Journal (2011) 11, Number 3, pp. 460–471 Speaking Stata: Fun and ﬂuency with functions Nicholas J. Cox Department of Geography Durham University Durham, UK [email protected] Abstract. Functions are the unsung heroes of Stata. This column is a tour of functions that might easily be missed or underestimated, with a potpourri of tips, Webcount counts the number of observations that satisfy the speciﬁed conditions. If no conditions are speciﬁed, count displays the number of observations in the data. Quick start Count the number of observations count As above, but where catvar equals 3 count if … tent name templateWebHello friends,What's up! In this video, I am coming with a new Stata Command which is "count".Definition of "count" command in Stata is "Count observations s... tent name tag template

"WebStata can convert continuous variables to categorical and indicator variables and categorical variables to indicator variables. 25.1.1 Converting continuous variables to indicator variables Stata treats logical expressions as taking on the values true or false, which it identiﬁes with the numbers 1 and 0; see [U] 13 Functions and expressions ... " - Stata function count

Stata function count

WebKeywords: pr0016, cond(), functions, if command, if qualiﬁer, generate, replace 1 Introduction Stata functions, like functions in any similar language, fall on a continuum, from those you know you want to those you do not know you need. If you want a logarithm, a square root, or some probability function, the only small diﬃculty is likely to be WebSep 27, 2024 · To get the grand total in each observation of the group, you need to use -egen-, not -gen-, and the function is -total ()- not -sum ()-: Code: bysort round_year ( firm_id_new) : egen ind_patsubgrp_total = total ( expgrp_total) 1 like Joro Kolev Join Date: Aug 2024 Posts: 3036 #3 30 Sep 2024, 14:21 What Clyde said, or slightly simpler Code:

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Web2 days ago · @BenBolker I explored the data and I suspect that there may be complete separation due to the variable loginc which mostly contains unique values for each case. Cross-tabulation gives for each unique value of loginc, the count is either zero or non-zero.But I wonder how the same function just from two packages end up in different … Webcount from left to right or from right to left, but note that Stata, by default, works on stringsfromlefttoright. Stata has a function, subinstr(), that looks for occurrences of …

WebMost Stata commands can be followed by if, for example Summarize if rep78 equals 2 summarize if rep78 == 2 Summarize if rep78 is greater than or equal to 2 summarize if rep78 >= 2 Summarize if rep78 greater than 2 summarize if rep78 > 2 Summarize if rep78 less than or equal to 2 summarize if rep78 <= 2 Summarize if rep78 less than 2 WebNov 16, 2024 · In Stata, this condition becomes y [_n] > record [_n - 1] But y [_n] can just be written y, as Stata by default always works on the current observation number (or, more precisely, all of them in sequence). cond () works like this: cond (true-or-false-condition, result if true, result if false) With one bound we get a solution:

WebFeb 7, 2024 · Stata has two system variables that always exist as long as data is loaded, _n and _N. _n basically indexes observations (rows): _n = 1 is the first row, _n = 2 is the second, and so on. _N denotes the total number of rows. To illustrate, let’s use stocks.dta. This portfolio contains 32 observations. WebMar 20, 2024 · To give a quick reply: Stata has an internal coding scheme for missing values that are ., .a, .b, .c, ... I assume from the post that you want to count all kinds of missingness. Then its simply: Code: count if missing (VAR) Zero is then not a missing, of course.

Webgen sum1 = trial1 + trial2 + trial3. The list command below illustrates how missing values are handled in assignment statements. The variable sum1 is based on the variables trial1, trial2 and trial3. If the value of any of those variables were missing, the value for sum1 was set to missing. Therefore sum1 is missing for observations 2, 3, 4 and 7.

Web3 Using Mata in Stata 3.1 Command line use Mata is directly accessed from the Stata command window. Type the stata command mata and all subsequent commands will be interpreted as Mata com-mands. Type end to return to the normal Stata command prompt. Note: All matrix and function de nitions are kept in the Mata tent newsWebcount counts the number of observations that satisfy the speciﬁed conditions. If no conditions are speciﬁed, count displays the number of observations in the data. Remarks … triathlon femme franceWebJul 19, 2024 · The macro function word count would do the job. . global x abc xyz foo . local len_x : word count $x . di `len_x' 3 Alternatively, . di wordcount ("$x") 3 Note the need to … tent national parkWebStata functions, like functions in any similar language, fall on a continuum, from those you know you want to those you do not know you need. If you want a logarithm, a square root, … triathlon femme distanceWebStata has several procedures that can be used in analyzing count data. Let’s begin by loading and describing a dataset on 316 students at two Los Angeles high schools. tent near me walmart triathlon ferropolisWebThe code below creates a variable called nmis that gives the number of missing values for each observation. The function rmiss2() used here is an extension to the egen function rmiss(). It counts the number of missing values in the varlist. rmiss2() accepts both string and numeric variables. (Stata’s rmiss() only accepts tent name plate template printable free