Count variables stata
WebI want to count the number of characters in each response/string and generate a new variable containing this number. Using the egenmore I have already counted the number of words using nwords, but I cannot find the counterpart for counting characters. EXAMPLE: egen countvar = nwords (stringvar) 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.
Count variables stata
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Webcount stores the following in r(): Scalars r(N) number of observations References Cox, N. J. 2007a.Speaking Stata: Counting groups, especially panels. Stata Journal 7: 571–581.. 2007b.Speaking Stata: Making it count. Stata Journal 7: 117–130.. 2007c.Stata tip 51: Events in intervals. Stata Journal 7: 440–443. Also see WebNov 19, 2013 · (1) -egen-'s -count ()- function just counts how often -- in your example -- the result of evaluating timedispatch<= timecreate [_n] & timedispatch +53<= timecreate [_n] is not missing, and it does that separately for each observation. The subscript [_n] here does no harm, but it just means "in the current observation" and can be omitted.
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. WebThe 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
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 ( count_obsv) which is 1 (and 0 for every element that has the same combination of loc_ID and year) for every new combination. Then I use: WebNov 16, 2024 · The variable nvals now contains the number of distinct observations. Although we chose to tag the first observation in each group, as was specified by _n == 1, we could have done it also for the last observation in each group, for which the code is _n == _N. In this problem, the result is the same. The next complication is that we might …
WebApr 10, 2024 · Now, I want to create a table that has the number of participants with each symptom on each day. For each symptom I created a counting variable that counts the number of patients suffering from each symptom. Now, I want to but the data into a table. Right now I am using the tabdisp-command, i.e. tabdisp Day_of_Influenca, cell (symp1 …
WebCount data often have an exposure variable, which indicates the number of times the event could have happened. This variable should be incorporated into your negative binomial regression model with the use of the exp () option. The outcome variable in a negative binomial regression cannot have negative numbers, and the exposure cannot … dj stunna stimelaWebAug 16, 2015 · 2 Answers Sorted by: 4 How about egen count_of_nonmiss = rownonmiss (`varlist') generate count_of_0s = count_of_nonmiss - count_of_1s When the value of the macro varlist is substituted into your if clause, the command expands to egen count_of_1s = rowtotal (`varlist') if Qa Qb C3 C4 Wa == 1 Clearly a syntax error. Share Improve this … dj su instagramWebMar 20, 2024 · count if missing (VAR) Zero is then not a missing, of course. However, I assume you want to have a deeper look into the issue and you need to prepare your data. For example, some institutes code missing values with negatives, like -999. Clearly, you need to recode them beforehand, for example: Code: dj stupid birthdaydj stunnaWebCounting with by. Using _n and _N in conjunction with the by command can produce some very useful results. Of course, to use the by command we must first sort our data on the by variable. sort group score by group: generate n1 = _n by group: generate n2 = _N list score group id nt n1 n2 1. 72 1 1 7 1 4 2. 76 1 3 7 2 4 3. 85 1 7 7 3 4 4. 90 1 6 ... dj su remixWebOct 11, 2024 · I am trying to create a new variable that counts the number of temperature variables whose value falls within a certain range of the temperature. For example, my data looks like this - Data sample. I would like to create a new variable that counts the number of days where the temperature was within 30°C - 31.9°C. dj suarez astrayWebApr 26, 2024 · egen watch_count=noccur (column_name), string ("watch") output: column_name apple_count penny_count watch_count. 1.) apple, penny, watch 1 1 1. 2.) penny, cherry 0 1 0. This is just how I've ... dj su4l