What is the Generate command in Stata?
The basic form of the generate command is generate newvar = exp, where newvar is a new variable name and exp is any valid expression. You will get an error message if you try to generate a variable that already exists.
What are double variables in Stata?
Storage Types in Stata Numeric variables are stored as byte, int, long, float or double. Float and double are the two that can hold non-integer numbers (decimals) and are the most common. More details on how numerical formats may affect datasets is available in this guide article.
Can you use two if statements in Stata?
if statements can be nested. An if statement can optionally be followed by an else statement. (But, the if qualifier does not have a corresponding else part. In Stata, that loop occurs separately for each statement.
What is Egen?
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 is the difference between generate and replace in Stata?
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.
What are the different types of Stata commands?
Stata Commands No Title Some Stata Commands General Plotting Commands Plot a histogram of a variable: graph vn, bin(xx) Plot a histogram of a variable using frequencies: graph vn, bin(xx) freq Plot a histogram of a variable with a normal approximation: graph vn, bin(xx) norm where xx is the number of bins. Plot a boxplot of a variable:
How do I create a new variable in Stata?
Stata has some utility commands for creating new variables: The egen command is useful for working across groups of variables or within groups of observations. See[D] egen for more information. The encode command turns categorical string variables into encoded numeric variables, while its counterpart decode reverses this operation.
How do you plot a histogram in Stata?
Some Stata Commands. General Plotting Commands Plot a histogram of a variable: graph vn, bin(xx) Plot a histogram of a variable using frequencies: graph vn, bin(xx) freq. Plot a histogram of a variable with a normal approximation: graph vn, bin(xx) norm. where xx is the number of bins.