How do you combine two categorical variables?
You do this by creating a new categorical variable based on the existing categorical variables you want to merge. The new categorical variable will automatically have the same categories as the categorical variables you are merging.
What is a categorical variable in Stata?
Stata handles categorical variables as factor variables; see [U] 11.4. Categorical variables refer to the variables in your data that take on categorical values, variables such as sex, group, and region. Factor variables refer to Stata’s treatment of categorical variables.
What are categorical variables and factor variables in Stata?
Stata handles categorical variables as factor variables; see[U] 11.4.3 Factor variables. Categorical variables refer to the variables in your data that take on categorical values, variables such as sex, group, and region. Factor variables refer to Stata’s treatment of categorical variables. Factor variables create indicator variables for
Which is an example of an expression in Stata?
An expression is a formula made up of constants, existing variables, operators, and functions. Some examples of expressions (using variables from the auto dataset) would be 2 + price, weight^2 or sqrt(gear ratio).
What is the difference between factor variables and categorical variables?
Factor variables refer to Stata’s treatment of categorical variables. Factor variables create indicator variables for the levels (categories) of categorical variables and, optionally, for their
What’s the difference between generate and replace in Stata?
replace Whereas generate is used to create new variables, replace is the command used for existing variables. Stata uses two different commands to prevent you from accidentally modifying your data. The replace command cannot be abbreviated. Stata generally requires you to spell out completely any command that can alter your existing data.