Count if in stata

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WebMar 2, 2024 · About Nick`s answer: fillin country year bysort country year : egen freq = total (!_fillin) by country: egen minfreq = min (freq) drop if minfreq <= 30 drop if _fillin drop _fillin. Worked fine but dropped almost all observations as many countries do not include more than 30 observations in each year of the study. WebIn Stata, the functionality of commands can be enhanced by adding qualifiers like if and in, and prefixes like by and bysort. Qualifiers are written in the middle of a command to let the command be applied on a specific …

r - `zeroinfl` from the `pscl` and `countreg` packages give very ...

WebApr 9, 2024 · count data analysis. Today, 13:54. Dear All. Anyone can help me to do the basic descriptive data analysis and then run a regression model to predict the statistically significant variable in predicting the disease? The table shows clinical presentation for subcategories of a group of diseases called (PID: primary immunodeficiency) and the ... Web//gen ct = time minus the time below this row, plus 1, if variable ==2 gen ct = t-t [_n+1]+1 if variable==2 //replace the count in this row with the count above, if variable ==1 replace ct = ct... old sulehay nature reserve

Stata: Using egen, anycount() when values vary for each …

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 … WebNov 16, 2024 · Stata follows two rules, the second of which may be considered as a generalization of the first. I will state the rules, and then we will look at each in turn. Rule 1: Logical or Boolean expressions evaluate to 0 if false, 1 if true. ... . count if foreign == 1 & rep78 == 4 shows that there are nine such cars in the auto dataset. WebNov 19, 2013 · Re: st: Generating a Count Variable of Number of Obs in a Time Interval Preceding the Current Obs. Let us first look at your code and explain, at least in part, why you got your results. (1) -egen-'s -count ()- function just counts how often -- in your example -- the result of evaluating timedispatch<= timecreate [_n] & timedispatch +53 ... is a building an asset or liability

Count unique values in Stata - Stack Overflow

Counting non-missing observations by variable - Statalist

WebIn that you could do one of these two things (and there are probably many more options): *----------- begin example -------------- sysuse auto, clear codebook make count if !missing (make) *------------ end example --------------- 2) You want to know how many observations have a specific string. 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 … old sugar house prisonWebcount counts the number of observations that satisfy the speciﬁed conditions. If no conditions are speciﬁed, count displays the number of observations in the data. … is a builder a secondary job

"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 … " - Count if in stata

Count if in stata

Row-wise count/sum of values in Stata - Stack Overflow

Web1 Answer Sorted by: 2 The documentation for egen warns you not to make references to _n. See Stata - Moving Finite Product for the principle that the sum for the last so many time units is the difference between two cumulative sums. However, I suspect that you should go straight to http://www.stata-journal.com/sjpdf.html?articlenum=pr0033 WebAug 31, 2013 · Variables move1 up represent on which moves each player was active. I need to count the number of times each player was . Stack Overflow. About; Products For Teams; ... Stata: Maximum number of consecutive occurrences of the same value across variables. 1. Stata: Counting number of consecutive occurrences of a pre-defined length ...

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WebOct 12, 2015 · ssc inst distinct. will install a function that is very close to what the mentioned SQL statement does. In the case of a dichotomous variable and 20 countries this statement will give the distinct number of value combinations of countries and the dichotomous variable. distinct Countries dichVar if dichVar == 1. Share. 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.

WebAug 16, 2015 · Row-wise count/sum of values in Stata. I have a dataset where each person (row) has values 0, 1 or . in a number of variables (columns). I would like to create two … WebOct 13, 2024 · This would seem to require the following simple code: count if control_ == "." The observations in variable control are strings. When I run the above code, I get a "0," but when I browse the data, there are many missing values. I have also tried: count if control_ == " " What may be happening? stata Share Improve this question Follow

Web1 day ago · What could be the reason for such a difference? Results from Stata closely resemble the results of zeroinfl from the pscl package (especially, the results for the count part of the model). I fited the models exactly similarly by specifying the same options using zeroinfl.control(). I also tried to search online to see if others have reported ... WebThis module shows the use of if with common Stata commands. Let’s use the auto data file. sysuse auto . For this module, we will focus on the variables make, rep78, foreign, mpg, …

WebNov 11, 2014 · Stata: Count if non-missing across row for certain range Ask Question Asked 8 years, 4 months ago Modified 8 years, 4 months ago Viewed 3k times 1 I am trying to count the number of times an event occurred before a particular age.

WebOct 17, 2024 · It is not a good idea in Stata to create a variable that is 1 when some logical condition is true but missing value when false. It is much better to create a 1/0 variable. So I would go with Code: gen vaxseries = (`A') & (`B') & (`C') instead. Nathan Garst Join Date: Dec 2024 Posts: 15 #10 28 Apr 2024, 11:55 Still getting invalid syntax error. old summerville road rome gaWebCounting from _n to _N Introduction Stata has two built-in variables called _n and _N. _n is Stata notation for the current observation number. _n is 1 in the first observation, 2 in … is a building an object old sunbeam camerasWebJul 11, 2024 · At present my approach: 1. Creates two dummies, with values if the person is employed / unemployed (respectively), and missing otherwise. 2. Uses egen count () with by, to create two new variables recording the raw number of employed / unemployed people in the region. 3. Creates a fifth new variable, the unemployment rate I actually want, by ... is a builder the same as a contractorWebThe 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 … old sumo wrestlerWebFor instance: id year x1 111 1999 3 111 2000 5 111 2001 6 123 2000 4 123 2001 2 For the above example, there are 2 unique ids (111 and 123). Since my dataset has over 6000 observations, what commands should I use to generate a count of unique ids? old sunbeam carsWebThat seed is the number with which Stata (or any other program) starts its algorithm toward generate the pseudo-random numbers. If you do not set the seed, Stata will start its algorithm using the seed 123456789. To set the seed, use the put seed command followed via a number. The total bucket be very large, including 30 or more digits. is a building lease a direct cost