WebVariable formats affect how Stata displays values of variables to the user and are loosely related to the storage type – a string cannot be displayed with significant digits for example. Numeric variables are stored as byte, int, long, float or double. WebStata will assume that the variables on both sides of the # operator are categorical and will compute interaction terms accordingly. • Hence, we use the c. notation to override the default and tell Stata that age is a continuous variable. • So, c.age#c.age tells Stata to include age^2 in the model; we do not
Stata Guide: Preliminaries I: Factor Variables
WebMar 13, 2014 · The string variable you must convert to numeric. encode is one option. Then use Stata's factor variable notation (i.e. #). A nonsensical example: clear all set more off … WebAug 26, 2024 · Note that I have used Stata’s factor-variable notation in the example below to include the main effect of the continuous variable age, the main effect of the categorical … lettmann zweierkajak
Stata capabilities: Factor analysis
WebJan 21, 2013 · Basically, the idea is that you run any regression using Stata's factor variable notation, where you tell Stata that a variable X is continous and should be interacted with itself, eg reg y c.x##c.x is the notation to regress Y on X and X^2. (Check out Stata's documentation on factor variables if this isn't familiar to you.) WebJun 8, 2014 · 1 Answer. Sorted by: 1. Just change the coding to positive integers (perhaps using recode ): x x2 -3 1 -2 2 -1 3 1 4 2 5 3 6. Also, you can use factor variable notation directly (instead of xi ): reg y i.x2##i.z. This will include main effects for the two categorical variables as well as their interaction. Share. http://scorreia.com/software/reghdfe/ letto ikea opinioni