What are the types of variables in Stata?
What are the types of 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.
What does format do in Stata?
format [ varlist ] displays the current formats associated with the variables. format by itself lists all variables that have formats too long to be listed in their entirety by describe.
What is double variable Stata?
If the identification numbers are integers and take 9 digits or less, store them as longs; otherwise, store them as doubles. doubles have 16 digits of accuracy. Stata stores numbers in binary, and this has a second effect on numbers less than 1.
What is a float variable Stata?
float is a storage format used by Stata, not a computation format. When you have a number stored as a float and you make a calculation, such as . gen newvar = sqrt(oldvar)/sqrt(2)
What does comma mean in Stata?
The option comma tells Stata that the file is comma-delimited. names tells Stata that the first row of data has variable names in it. case indicates that Stata should keep the case of the variable names (upper-case, etc). Finally, the clear option will clear the data currently in memory.
What is a string variable in Stata?
String variables, simply speaking, are variables that contain not just numbers, but also other characters (possibly mixed with numbers). But actually a string variable may contain characters such as “\” or “-” or “:” and so on — anything a keyboard may produce.
What is float variable Stata?
float is a storage format used by Stata, not a computation format. When you have a number stored as a float and you make a calculation, such as . gen newvar = sqrt(oldvar)/sqrt(2) oldvar is retrieved and is promoted to a double.
What does long mean in Stata?
Storage types
| byte | integer values between -127 and 100 |
|---|---|
| long | integer values between -2,147,483,647 and 2,147,483,620 |
| float | real numbers (i.e. numbers with decimal places) with about 8 digits of accuracy |
| double | real numbers (i.e. numbers with decimal places) with about 16 digits of accuracy |
Does numeric format include commas?
Writes numeric values with a comma that separates every three digits and a period that separates the decimal fraction.
How can I change the number of decimals in Stata’s output?
In Excel you can do this either by changing the formatting of the cell (use a number format and the pop-up will give an option to change decimals) or use the =round(cell, 2) function to round the contents of cell to 2 decimal places. If the number is zero, no decimal places are displayed.
What is string variable example?
Example: Zip codes and phone numbers, although composed of numbers, would typically be treated as string variables because their values cannot be used meaningfully in calculations. Example: Any written text is considered a string variable, including free-response answers to survey questions.
What kind of format can I use in Stata?
Formats for special types of variables. Stata offers possibilities to define string variables (variables containing characters) or date/time variables. These have their own formats and may be dealt with here later.
What kind of variables can be defined in Stata?
Stata offers possibilities to define string variables (variables containing characters) or date/time variables. These have their own formats and may be dealt with here later.
What do w and D stand for in Stata?
Stata’s three numeric formats are denoted by a leading percent sign, %, followed by the string w.d (or w,d for European format), where w and d stand for two integers. The first integer, w, specifies
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.