Why does Stata say invalid syntax?

invalid syntax This error is produced by syntax and other parsing commands when there is a syntax error in the use of the command itself rather than in what is being parsed.

What does ## in Stata mean?

Stata: Data Analysis and Statistical Software You can put a # between two variables to create an interaction–indicators for each combination of the categories of the variables. You can put ## instead to specify a full factorial of the variables—main effects for each variable and an interaction.

How long can a variable name be in Stata?

32 characters
4 STATA allows up to 32 characters as a variable name. Make it consistent and systematic. 5 • Use lower cases unless necessary or required.

What is a type mismatch error in Stata?

A type mismatch means that you trying to do something numeric to strings, or vice versa. In your examples, possibly year is a string variable somehow. If so, destring year, replace. On debugging: Stata will stop with an error message as soon as it hits a problem.

What coding language does Stata use?

Stata was written, then as now, in the C programming language, initially for PCs running the DOS operating system.

Is there an or command in Stata?

In Stata, these expressions use one or more various relational and logical operators. The operators ==, ~=, != , >, >=, <, and <= are used to test equality or inequality. The operators & | ~ and ! are used to indicate “and”, “or”, and “not”.

What makes a variable name invalid in Stata?

Variable name may not start with a digit or underscore, and may not end with an underscore. Double underscores are not permitted in variable name. Variable names may not be longer than 32 characters and are required to be shorter for some question types: multiselect, GPS location and some other question types.

What is a float variable in Stata?

For example, float variable type data will be stored with a 7-digit level of accuracy. This means that Stata will not round a number stored as a float type, as long as the number is 7 total digits or fewer. If precision is needed past the 7- digit limit, however, the “double” storage type should be used.

What programming language does Stata use?

Is Stata easy to learn?

Stata is both easy to learn and also very powerful. Stata is easy to learn in two ways. First, it offers a point-and-click interface that you can use if you do not know the name of a command, or the particulars of using it.

What is the best way to learn Stata?

Short and convenient for busy schedules, webinars are a great way to learn about Stata from our experts. Short demonstrations on using Stata. Topics covered include everything from a quick tour of Stata to advanced statistical techniques. In-depth on-site training courses taught by StataCorp experts in your facility.

Is Stata syntax based?

Stata has a simple, consistent command syntax. As you learn more commands in Stata, you can save yourself time by typing these commands directly into the Command window.

How do I use syntax in Stata?

The syntax command. syntax is easy to use. syntax parses standard Stata syntax, which is command varlist if exp in range [weight] using filename, options Actually, standard syntax is a little more complicated than that because you can substitute other things for varlist.

Why does Stata see my macro as if it’s empty?

The local macro `keyvar’ will be empty so Stata will see those commands as if we ran incomplete commands like: There are two common ways to resolve this issue. The first is defining the macro in the part you are selecting, so it will be present when you run the selection, such as running all three lines in the first example code.

How to sum all the variables in a data set in Stata?

Stata thus sees the command as -qui sum-, and, as -summarize- does when called with no varlist, it summarizes every variable in the data set. (If you hadn’t put the -qui- prefix on you would have seen that.) The `r (mean)’ is then the mean of the last variable, rather than the one you were hoping for.

Why can’t I use the-syntax-statement to specify a varname?

Although the -syntax- statement allows you to specify varname, a peculiarity is that the resulting variable name is not stored in `varname’, it is stored in `varlist’. So when you get to -qui sum `varname’-, varname is, in fact, an undefined macro, which is interpreted as an empty string.