Generate count by group stata

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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. WebOct 31, 2013 · Stata: Generate new variable with all values (e.g. not just max or min) for a group based on other variable in the group 1 Row-wise count/sum of values in Stata

Stata FAQ: Creating variables recording properties of the other ...

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 == … WebOct 27, 2014 · At the moment I have to deal with paradata (long-format) generated by a software during the data collection phase of a cohort study. How can I create a variable containing the number of occurence of a certain value by a group-variable (like by id: gen _n if VAR1==2 in Stata)?. Basically the data looks like this: st mary willesden

Stata FAQ: Number of distinct observations

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 … WebNov 16, 2024 · Now the number of groups is identifiable from . summarize group, meanonly . local max = r(max) Typically, then you loop over groups: . forvalues i = 1/`max' { something for each group. } There is one common need we should mention. As we cycle over the groups within the loop, we often wish to display the identifier of the current group. 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 ... st mary wic office

STATA Tutorials: Creating a Grouped Variable - YouTube

WebThis is because sorts the data by the variable list and assigns each distinct group an integer value. If one dataset includes distinct groups that the other does not, you likely will ... WebIn Stata we can state something as true like below: use the dummy variable without explicitly specifying the condition but with the variable name alone. ... variables created for the number of the levels of rep78. For each variable, ... Creating Group Identifiers. egen group_id = group(old_group_var) creates a new group id with numeric values ... st mary williamston miWebCalculate the number of countries in each income group and their average census year, using the egen command. egen stands for “extended generate,” and it allows for creating statistics and other functions by groups. st mary willesden church

"WebRecoding variables using recode. There is an easier way to recode mpg to three categories using generate and recode. First, we make a copy of mpg, calling it mpg3a. Then, we use recode to convert mpg3a into three categories: min-18 … " - Generate count by group stata

Generate count by group stata

Stata: using egen group () to create unique identifiers

WebAug 3, 2015 · Stata sum by group. tinh huyen xa diaban hoso fee1 fee2 income 1 1 4 12 13 100 200 1 1 4 12 13 120 150 1 1 5 11 14 130 140 1 1 5 11 14 100 100 1 1 6 14 20 130 … WebNov 17, 2024 · Dear Stata users, I have a panel data set with 14 string variables each of which indicates whether this type of service is provided (one variable per. ... I would like to create a count variable "total" indicating the number of services provided for each observations. This variable would most likely count the number of "NP"s in all 14 …

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WebJan 14, 2015 · What I want is a cumulative count of the number of floods over the past year within each group (id), as is shown by the *cumulative_count* variable that i added. There are sometimes several id's at the same time in the same country, so the cumulative variable needs to address this. cntry year mn id flood *cumulative_count* WebOne of Stata’s most powerful and useful commands is egen. Like generate, it is used to create new variables, but it is much more than that. Using egen difficult and tedious variables can be created easily. Some examples are variables whose values are the mean of another variable for each group such as sociability for males and females.

WebNov 16, 2024 · In particular, egen, total () by () is natural for producing totals, including counts, separately for groups defined by one or more variables specified as arguments to … WebMay 25, 2024 · I have a number of variables. One of them is an ID and another one is Place. I want to generate a variable that tells me how many ID´s each place has. I have tried this: egen Counter = count(ID), by (place) But I get a type mismatch. I figured it has …

WebFor example, the complete offending code with a minimal data input that recreates the problem. See help input for creating short example data within a do-file. – Roberto Ferrer. Mar 27, 2014 at 0:14. ... Convert Stata "egen, group" to SAS. 0. repeated time values within panel (r451) 1. Stata using if condition with _n under by and egen commands. WebSTATA Tutorials: Creating a Grouped Variable is part of the Methodology Institute Software tutorials sponsored by a grant from the LSE Annual Fund.

Webelsewhere in Stata. The big idea behind by: is just this: do something separately for each group of observations deﬁned by a speciﬁed variable list (varlist). For example, imagine that you have read in Stata’s auto.dta. On your machine, that dataset will be in whatever directory or folder the sysdir command tells you pertains to STATA ...

WebOct 8, 2014 · For "wanted1" I want to generate a count for obs==1 based on obs==1, by group_id. For "wanted2" I want to generate a count for obs==1 based on the number of distinct periods until and including obs==1, by group_id. Any input on these problems would be highly appreciated. Sincerely, Erik Aadland st mary whittier caWebNov 16, 2024 · This command creates a new variable newid that is 1 for the first observation for each individual and missing otherwise. _n is the Stata way of referring to the … st mary willingdonWebMar 20, 2024 · For example, some institutes code missing values with negatives, like -999. Clearly, you need to recode them beforehand, for example: Code: replace VAR = .a if VAR == -999 //Not at home replace VAR = .b if VAR == -9999 //Refusal. So Stata knows what defines a missing. st mary williamston school