What is Egen command in Stata?
The Stata command egen, which stands for extended generation, is used to create variables that require some additional function in order to be generated. Examples of these function include taking the mean, discretizing a continuous variable, and counting how many from a set of variables have missing values.
What does Rowmax mean in Stata?
rowmax(varlist) may not be combined with by. It gives the maximum value (ignoring missing values) in varlist for each observation (row). If all values in varlist are missing for an observation, newvar is set to missing. It gives the (row) median of the variables in varlist, ignoring missing values.
What does Egen group do in Stata?
egen creates a new variable of the optionally specified storage type equal to the given function based on arguments of that function. The functions are specifically written for egen, as documented below or as written by users.
What is difference between Gen and Egen in Stata?
generate is a fast internal command. egen is being parsed by Stata, and you can write extensions to it using Stata ado-code.
What is the difference between append and merge?
Merge will join two tables horizontally adding columns based on matching key columns like vlookup in Excel from the 2nd table, but append, you add rows from the 2nd or more tables to the 1st table the end.
What does _n mean in Stata?
observation number
Introduction. Stata has two built-in variables called _n and _N. _n is Stata notation for the current observation number. _N is Stata notation for the total number of observations.
Can you Bysort two variables in Stata?
Sort order You can use the sort command in Stata to acheive this. Of course you can order your observation based on ordering one variable, but you can go further and sort your data on multiple variables.
What does Egen tag do?
egen creates a new variable of the optionally specified storage type equal to the given function based on arguments of that function.
How do you break lines in Stata do file?
16.1.3 Long lines in do-files You can change the end-of-line delimiter to ‘;’ by using #delimit, you can comment out the line break by using /* */ comment delimiters, or you can use the /// line-join indicator.
When to use the opposite of concatenate in Excel?
As we all know, the Excel Concatenate function can be used to combine multiple strings in one single cell. However, some situations arise where you might be in need to do exactly the opposite of concatenating, i.e. split the combined text into different columns.
When to use Stata to split a string?
stata.com splitis used to split a string variable into two or more component parts, for example, “words”.You might need to correct a mistake, or the string variable might be a genuine composite that youwish to subdivide before doing more analysis.
What does Stata tell you about your data?
Stata is telling you that your data has one or both of the problems above. Note that Australia 2012 & Canada 2012 are listed 2x. Also note that year is missing 2x for US. If country year should uniquely identify the data, then you will want to look for duplicates ( help duplicates ).