foreign and will execute it whenever autoreg is run as if it were an ordinary command.Īs a first extension, we might try writing a command that is not dependent on the data, such as one that would list all the values of each variable for us. The variance inflation factor for the predictors of interest was less than 2, indicating no multicollinearity. For example, we might write the following program in an ordinary do-file:
Like the < pre > andIt is powered by the Pygments library and supports hundreds of different programming languages and file formats.
#Stata if else code
Using program drop before the block will ensure that the command space is available. The SyntaxHighlight extension, formerly known as SyntaxHighlightGeSHi, provides rich formatting of source code using the < syntaxhighlight > tag.When a program command block is executed, Stata stores (until the end of the session) the sequence of commands written inside the block and assigns them to the command name used in the program command. The program command defines the scope of a Stata program inside a do-file or ado-file. The tempvar, tempfile, and tempname commands all create objects that can be used within the scope of program execution to avoid any conflict with arbitrary data structures.The syntax command parses inputs into a program as macros that can be used within the scope of that program execution.The program command sets up the code environment for writing a program into memory. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators.That said, Stata programming functionality is achieved using several core features: set of Stata commands that includes the program statement.
![stata if else stata if else](https://datacarpentry.org/stata-economics/img/interface.png)
![stata if else stata if else](https://www.princeton.edu/~otorres/Stata/dofile_files/image033.jpg)
The article does not assume that you are actually writing an ado-file (as opposed to a program definition in an ordinary dofile) and it does not assume you are writing a command for distribution. You should consider yourself a Stata programmer if you write do-files: sequences of Stata. This is in contrast to ordinary programming of do-files. Gen electron_right=(electron=1) if electron<.This article will refer somewhat interchangeably to the concepts of "programming", "ado-files", and "user-written commands". Gen bigbang_right=(bigbang=1) if bigbang<. Label define edcats 1 "Less than HS" 2 "HS" 3 "Some College" /// Label variable edu_cat "Education Category" Gen edu_cat=1 if educ12 & educ16 & educ12 & educ16 & educ<. if conditions ensure that each respondent gets the right value of edu_cat based on its value of educ. You'll need an initial gen command to create the new variable and handle one of the categories, and a replace command for each of the remaining categories. Let's turn the educ variable ("HIGHEST YEAR OF SCHOOL COMPLETED") into a categorical variable edu_cat, with the categories "Less than High School", "High School", "Some College", "Bachelors", and "Advanced". With replace, an observation that doesn't meet the if condition is left unchanged. With gen, an observation that doesn't meet the if condition will not get a value for the new variable-it will be missing instead. The gen and replace commands will often have if conditions.
![stata if else stata if else](https://www.stata.com/why-use-stata/i/markdown_example4_browser_dofile_combo.png)
![stata if else stata if else](https://i.imgur.com/p1pmq8g.png)
The something you're setting the variable to will be the result of some math, but it can be really simple math, like a single number. The basic syntax is the same for both commands: Since replace can destroy data, it has no abbreviation. You can change the value of an existing variable using replace. You create a new variable in Stata using the generate command, usually abbreviated gen. Start with the usual setting up (see Doing Your Work Using Do Files):
#Stata if else how to
In this article you'll learn how to create new variables and change existing variables.Īssuming you created an SFS folder while reading Managing Stata Files, go to that folder and create a new do file called newvars.do. If you are new to Stata we strongly recommend reading all the articles in the Stata Basics section. This article is part of the Stata for Students series.