2024 Stata function count

Stata function count

Author: ckqi

August undefined, 2024

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. Remarks … 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.

Missing Values Stata Learning Modules - University of California, …

WebThe rule is to calculate the number of any occurrences in the matched id (disregarding whether it is treated or not) within one year starting from the date of the treated observations. Example: The very first treated observation is matched with id 2. id 2 has two observations within the next year after February 1st, 2000. 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 … breaking news nsw police

count total observations per variable group - Statalist

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: WebJul 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 … 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. breaking news nyc fire

How to count the number of missing values? - Statalist

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. WebStata 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, … breaking news nyc twitter chelseaWebNov 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: breaking news nwitimes

"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 … " - Stata function count

Stata function count

Collapsing data across observations Stata Learning Modules

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 WebAs a program, Stata functions by manipulating variables. The notion of a variable in Stata corresponds directly with the notion of a variable in econometrics. Each variable thus has a certain number of observations associated with it (frequently all variables will have the same

Did you know?

WebWe will illustrate this using an example showing how you can collapse data across kids to make family level data. Here is a file containing information about the kids in three families. There is one record per kid. Birth is the order of birth (i.e., 1 is first), age wt and sex are the child’s age, weight and sex.

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 ... 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?

WebMay 25, 2024 · The command egen newvar = count (stringVar), by (groups) does not work ( type mismatch r (109); ). Removing the by (groups) doesn't solve the issue: the problem … Web1 I have a dataset in Stata and want to count by group ( loc_ID) and year. I used the following two lines of code: egen count_obsv = tag (loc_ID year) This adds a counter to my dataset ( …

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

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 cost of genesis sv80WebThe 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, cost of genesis gv80 suvWebStata 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. breaking news nyc todayWebcount 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 … cost of genesis vehiclesWebPay 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 cost of genesis health club membershipWeb3 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 breaking news nyc subway shootingWebgen 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. breaking news nyc subway